Revista Brasileira Multidisciplinar

Skate territories: a review study on youth leisure

Victor Hugo Nedel Oliveira — 2025-01-01

The study addresses the leisure practices of youth skateboarders and their relationship with the occupation of urban spaces. The article's objective is to conduct a review of studies investigating skateboarding as a physical practice and its interaction with territory. The methodology involved the analysis of 26 studies, including 18 articles, 6 dissertations, and 2 theses, categorizing the most recurrent terms in the conclusions of these works. The results highlight three main categories: the skateboarders themselves, the spatial context of their practices, and skateboarding as an activity that goes beyond sport. It was observed that skateboarders reconfigure urban spaces, transforming them into territories of leisure and sociability. Additionally, the studies indicate that public policies aimed at urban leisure are still limited and deserve greater attention. The article concludes that youth skateboarders challenge urban order by reinterpreting public space, bringing important reflections on territory, identity, and leisure.

Cross-cutting themes in didactic productions by members of the Programa de Residência Pedagógica at FCL Unesp/Assis

Ariadne Beatriz Ávila — 2025-01-01

During the 2020-2022 cycle of the Programa de Residência Pedagógica, a research study titled "Initial Training of Spanish Language Teachers in the Programa de Residência Pedagógica of FCL Unesp/Assis: Constructing Critical Teaching" (ÁVILA, 2022) was developed at the master's level, stemming from a training workshop offered to residents of the Letters course - Spanish language subproject of FCL Unesp/Assis. Throughout the preparation and execution of the workshop, during which action research was conducted, the topic of "cross-cutting themes" was not formally named as a subject of knowledge in the activity schedule. Subsequently, enrolling in the specialization course in Cross-Cutting Themes at IFSP Salto provided an understanding that the construction of critical teaching, by presenting and problematizing historical, cultural, political, and geographical contexts involved in language teaching, needs to implicitly address social issues. With the aim of reflecting on the importance of cross-cutting themes in the teaching of Spanish as a foreign language, we revisited the completed research, specifically focusing on the four didactic sequences produced by the residents at the conclusion of the workshop. We conducted a qualitative documentary analysis to verify the presence of cross-cutting themes in the productions and, if present, how the approach was or could be conceived. Without receiving this designation, cross-cutting themes were identified both as a reality and a possibility in the didactic proposals, demonstrating that resident graduates understood the significance of connecting language with the social world when teaching Spanish as a foreign language.

Hypodermoclysis in patients under palliative care: new pharmaceutical recommendations for clinical practice

Stephanie Colin — 2025-01-01

Palliative care (PC) is defined by the World Health Organization as an approach that improves the quality of life of patients and their families facing problems associated with life-threatening illnesses. Hypodermoclysis (HDC) is considered the second main route of administration for patients undergoing PC and is mainly recommended in cases of impossibility of oral ingestion and difficult venous access. As it is considered an old practice, more medications are being tested and recommended for use via HDC. The pharmacist is the professional responsible for answering questions related to medicines and may not be properly updated and qualified on the topic. The objective of this work was to describe the new pharmaceutical recommendations for the use of medications and fluids through HDC. The review was carried out in the Medline databases; Embase; Cochrane Database; Latin American Literature in Health Sciences and Scientific Electronic Library Online, including publications in any language from 2015 onwards. The exclusion criteria was articles on HDC in pediatric PC and articles that contain only technical information involving this route. The search resulted in 872 articles. Of these, 67 were fully analyzed, 42 of which were included. The summary of the new pharmaceutical recommendations regarding the administration of medications and fluids via HDC can help guide this professional in clarifying doubts and making evidence-based decisions, promoting the optimization of pharmacotherapy for patients under PC.

Research on iron deficiency anemia and risk factors in preschool children

Fernanda Francischini Assunção — 2025-01-01

Iron deficiency is identified as the main causal determinant of most cases of anemia, and is currently the most prevalent nutritional deficiency in the world, affecting developed and developing countries. Among the populations at risk for iron deficiency anemia, preschool children constitute a vulnerable group, raising concern due to the losses it causes: impairment of mental development, delayed growth and physical development, increased frequency of morbidities, among others. In this context, this article shows data collection from the last 10 years with the aim of clarifying the current prevalence of anemia in preschool children in Brazil and what are its main risk factors. To prepare this work, a systematic search was carried out in the electronic databases Virtual Health Library (VHL), PubMed/Medline, LILACS and SciELO. The results obtained show that iron deficiency anemia in preschool children is strongly associated with several sociodemographic, dietary and health factors.

Responsive architecture for cognitive health

Ciro Férrer Herbster Albuquerque — 2025-05-06

Using an exploratory research methodology, this research seeks to provide support to designers and health professionals in creating built spaces capable of contributing to cognitive health and continuous learning throughout users' lives. To achieve this objective, the experimental concept of environmental enrichment (EA) was investigated through an integrative literature review, exploring its neuroscientific contributions in relation to the significant influence that the physical environment and its possibilities can exert on the structure of the brain, resulting in biological, psychological and social changes, especially during human aging. Although studies related to EA and brain plasticity generally consider animal models, it is clear that exposure to enriched environments can induce beneficial structural changes in the brain, resulting in improvements in cognitive capabilities, such as learning and cognitive reserve. The practical application of these concepts is configured through a diagram of design propositions, which can be incorporated into current and future architectural and urban constructions. This approach is supported by recent research with human models carried out over the last three years. Effects capable of mitigating chronic stress, anxiety and cognitive decline are constantly identified in the studies analyzed. Thus, considering the significant potential that the built environment has to influence human behavior, approaches that integrate neuroscience, architecture and learning are considered essential for the design of spaces aligned with the promotion of cognitive health throughout life.

Biological aspects of feathers evolution

Glauco Verner Firmino — 2025-01-01

The tretapod teguments has undergone several modifications throughout the their evolution, which it includes living and extinct groups, and it is related to several adaptive advantages, as the case of feather, a morphological trait that is currently restricted to birds. This character is the result of the tegument evolution in reptile groups since the Triassic. In this sense, this literature review aimed to investigate publications on the origin of feathers, their possible morphologies and ancestral stages, their development in living birds, the adaptive impacts of feathers and which groups presented feathers or their possible precursor stages. The ancestral feathers possibly arised in the Avemetatarsalia group whose origin refers to the Triassic period and would be structures that would enable thermal insulation and thus maintain higher metabolic rates than other groups in a competitive environment. Although there is no fossil evidence tracing morphological changes in feathers since their origin, an evolutionary model is accepted leading totake into account the evolutionary novelties that feathers present during their development in a characteristic scenario of Evo-Devo.

Steel-concrete composite connections in a fire condition: a review

Renato Silva Nicoletti — 2025-01-01

Steel-concrete composite connections are characterized by the fact that the concrete slab participates in the transmission of forces from a composite beam to a column or another composite beam in the adjacent span. Although there are composite connections with known and consolidated behavior, there are still doubts about the working mechanism of steel-concrete composite connections in a fire situation, in which high temperatures significantly alter the distribution of resistance and stiffness, both in the connections and in the elements associated with them. In this scenario, there is a shortage of worldwide research evaluating the behavior of steel-concrete composite connections in a fire situation. The objective of this work was to conduct a bibliometric analysis and subsequent systematic literature review about research on steel-concrete composite connections in fire situations, to outline the state of the art on the subject and contribute to the advancement of research in the area from the identification of the main gaps in existing knowledge. Among the identified gaps, the recommendations for conducting investigations on the behavior of steel-concrete composite connections stand out, considering their relationship with the structure globally, in addition to their isolated behavior.

Hypopressive abdominal gymnastics in lumbopelvic disorders

Pâmela Gross — 2025-01-01

The hypopressive abdominal gymnastics technique comprises exercises that generate a decrease in abdominal and thoracic pressure, combining controlled methods and abdominal traction maneuvers, reflexively activating the abdominal and pelvic floor muscles. It can treat various dysfunctions related to the lumbopelvic region, such as urinary incontinence, diastasis of the rectus abdominis muscles and low back pain. The objective was to carry out an integrative review on the effects of hypopressive gymnastics on urinary incontinence, diastasis of the rectus abdominis muscles and low back pain. An integrative review was performed using the following databases: PubMed, Scielo, Lilacs and PeDro, using the keywords in English and Portuguese: urinary incontinence, low back pain, hypopressive abdominal gymnastic, hypopressive method and diastasis of the rectus abdominis, grouping the studies in a table composed by: authors/year, type of study, objective of the study, sample, intervention and result. Nine studies were analyzed and selected that brought hypopressive abdominal gymnastics as a possibility of treatments in rectus abdominis diastasis, urinary incontinence and low back pain, as well as its effects on these. It is concluded at the end of this study that hypopressive abdominal gymnastics can be used in the disorders listed here, as it has beneficial effects for these, mainly in the reduction of abdominal diastasis, symptoms of urinary incontinence and improvement of muscle dysfunction, reducing low back pain and improving its functionality and mobility. However, it is still necessary that new studies be carried out, since the literature is still scarce to approach this subject.

The use of biomimetic concepts in current Dentistry: literature review.

Flávia Rossi Caruso — 2025-01-01

Biomimetism originates from Greek and in dentistry it establishes principles and techniques that aim to protect the natural structure of the tooth, seeking to imitate the properties of enamel and dentin to restore teeth in a natural and functional, understanding the natural tooth in its entirety. Furthermore, biomimetism requires minimally invasive techniques, with the aim of preserving tooth structure, seeking dental aesthetics and the use of adhesive materials. This approach is constantly evolving, so the objective of this study was to review on the literature the main aspects that characterize the biomimetism in restorative dentistry, involving dental materials, such as resins and adhesive systems, as well as stress reduction and maximum adhesion protocols to the dental substrate. The use of biomimetic materials and restorative protocols that seek to reduce the stress of polymerization contraction and achieve maximum adhesion are the main focuses of study within biomimetic restorative dentistry. This has been achieved with advances in the development of adhesive systems, protocols and different application techniques, for example. The use of minimally invasive in biomimetic techniques may help reduce pain and discomfort during care, with less traumatic interventions and longer-lasting results.

Exploratory analysis of trends in urban agriculture

Eduardo Silva — 2025-05-06

Feeding the world’s population in a nutritious and sustainable way is one of humanity's greatest challenges. In response to this challenge, Urban and Periurban Agriculture (UPA) emerges as an alternative for supplying food in cities. The objective of this study is to provide an exploratory overview of urban agriculture worldwide, identifying the main elements of the external environment of the UPA sector, following Competitive Intelligence principles. Based on an initial set of keywords, namely "urban agriculture," "vertical farms," "urban farming," and "vertical farming," academic articles were identified on the Google Scholar platform, and news articles related to the external environment of UPA were sourced from Google News. The searches were limited to the period between January 2020 and April 2024. Subsequently, new keywords were explored as necessary to delve deeper into each element of the external environment. The results show that urban agriculture is expanding globally and is practiced in various models, notably community gardens, rooftop gardens, controlled-environment food cultivation, and cellular agriculture.

Scientific and patent monitoring of barley biotechnological processes for the development of antioxidant bioproducts.

Robson Almeida Silva — 2025-04-01

The potential of fermented barley in the production of antioxidants, such as phenolic compounds, carotenoids, and other polyphenols, presents benefits for human health, given its capacity to mitigate oxidative stress associated with various chronic diseases such as cancer, cardiovascular diseases, neurodegenerative diseases, and others related to aging. This study examines the capacity of barley fermented through biotechnological processes to enhance antioxidant bioproducts and presents data from prospective technological studies. Using keywords, a monitoring of patents and articles was conducted on the Spacenet portals and various databases (Sciencedirect, Pubmed, Science.gov, Scopus, and Nature). A bibliometric analysis of the co-occurrences of biotechnological processes of barley related to combating oxidative stress was performed using the VOSViewer software. Based on patent and article data, advances since 2010 are highlighted, especially in combating oxidative stress, revealing progress in technologies, analytical methods, and synthesis of bioactive compounds. The intersection between science and technology underscores the importance of multidisciplinary approaches. Technological prospecting highlighted the leadership of countries such as China, the USA, and Japan, with significant contributions of commercial interest and patents in the agrochemical, food science, and pharmaceutical industries. Therefore, this study emphasized the gamification of global innovations with the growing potential of barley biotechnological processes, reflecting a trajectory at the forefront of global innovation.

Seed quality, establishment and initial growth of black oat subjected to copper stress

Mariane Comiran — 2025-04-01

The aim of this work was to evaluate the interference of copper (Cu) in the processes of germination, growth and initial development of two batches of black oats, one of which was originated by the accelerated aging technique. Two experiments were carried out, the first evaluated the capacity for establishment and initial growth of seedlings and the second, conducted in a hydroponic system, evaluated the development of the plant. A completely randomized design was adopted for the experiments, with the second experiment being conducted in subdivided plots. A factorial scheme (5x2) was used with five copper concentrations (0, 25, 50, 100, 200 µM CuSO₄) and two vigor levels. Concentrations of 0 to 200 µM of CuSO₄ did not alter the physiological quality of high and low vigor black oat seeds. The different concentrations of copper were harmful to the establishment and initial growth of black oat plants, regardless of the vigor levels of the seeds used.

Effect of different application rates used by piloted aircraft on watermelon cultivation

Luis Felipe Oliveira Ribeiro — 2025-04-01

Watermelon is one of the most cultivated vegetables in the world, however, the productivity and quality of the fruits are influenced due to the constant attack of pests and diseases. In this sense, the use of remotely piloted aircraft becomes a viable alternative. The objective of this study was to evaluate the effect of different application rates (8, 12 and 16 L ha^-1) on the distribution of drops on different watermelon targets using a remotely piloted aircraft. Water-sensitive paper labels were used and placed on the targets of the watermelon tree (adaxial leaf, fruit and apical bud) for data collection. The results indicated that there was an increase in average values, as application rates increased in all watermelon targets, with a significant difference only for the lowest application rate (8.0 L ha^-1). This study demonstrated, for the first time, the feasibility of using ARP in the possible application of phytosanitary products in watermelon cultivation.

Awareness of electricity consumption as a learning tool in Physics: case study with High School students

Renata Mori — 2025-01-01

Sustainability aims to balance current needs with the future capacity of our planet, ensuring that present generations do not compromise future generation. Achieving sustainability in the energy context involves adopting practices to minimize waste and reduce the environmental impact associated with energy generation and consumption. Sustainable measures include implementing renewable energy sources such as solar and wind, and promoting conscious consumption behaviors. In this regard, this study assessed the impact of reducing electricity consumption in households of students enrolled in the Integrated High School at the State Technical School José Martimiano da Silva, after implementing sustainable practices learned in the Physics class. To evaluate the reduction in electricity consumption, students measured consumption in kWh by reading residential electricity meters. A reduction in electricity consumption was found in 88% of the analyzed sample, ranging from 191 kWh to 88 kWh, following the implementation of sustainable measures focused on reducing consumption. Additionally, participants from each course presented various ideas for mitigating energy consumption, spanning from the application of smart technologies and systems to the implementation of efficient design strategies, data analysis, and administrative management. Thus, the results underscore the importance of educational programs in raising awareness and promoting changes in energy consumption behavior.

Food and nutritional contexts for primary health care users with type 2 diabetes mellitus: educational booklet

Iury Souza — 2025-01-01

Low knowledge of type 2 Diabetes Mellitus (DM2) is associated with inefficient glycemic control and may be related to non-adherence to nutritional treatment. The use of validated printed educational materials is one way of approaching topics that can contribute to individuals' knowledge and add value to health services. This study focused on constructing and validating an educational booklet on food and nutritional contexts for Primary Health Care (PHC) users with DM2. The booklet was developed by the researchers and validated by a group of judges made up of nutritionists and nurses. The evaluation considered the following domains: scientific accuracy, content, literary presentation, illustration, specific and comprehensible material and quality of information. After the judges' assessment, the Content Validity Index (CVI) was applied. Acceptable agreement was obtained when each item in the instrument had a minimum CVI value of 0.80. Although the Educational Booklet had a high overall CVI (0.99), the judges requested adjustments related to improving the content, including adjusting the spelling of the text, reformulating texts and figures to make them easier to understand and changing terms or expressions to make them simpler to read, in order to favor interpretation by the target audience as much as possible. The conclusion is that the Educational Booklet on food and nutritional contexts for PHC users with DM2, validated by expert judges, is a substantial tool to be used as a health promotion measure for this target audience.

Trend in precrisptions of antidepressants and anxiolytics in the fist year of the COVID-19 pandemic

José Matheus Mendonça da Silva — 2025-01-01

The pandemic caused by SARS-CoV-2 has led to several changes in society's behavioral patterns. Social isolation and the pandemic, in general, have been important factors in the development of various psychiatric disorders in Brazil and around the world, such as anxiety disorders and depression, as well as in the increase in prescriptions for antidepressants and anxiolytics. This study analyzed the trend in prescriptions for antidepressants and anxiolytics in 2020. A cross-sectional, retrospective and quantitative analysis was carried out, using prescriptions retained in units of a private pharmacy chain, from January 1, 2020 to December 31, 2020, assessing the trend in prescriptions during the initial year of the pandemic. A total of 1072 prescriptions were analyzed, showing an increase in prescriptions for antidepressants and anxiolytics. There was a gender disparity between prescriptions for men and women, with women being more prevalent. There was a predominance of prescriptions made by general practitioners, indicating a shortage of specialists in the countryside. Finally, there is a need for public policies that enable greater monitoring of the dispensing of psychotropic drugs, as well as making more specialist doctors available in the interior of Brazil.

The impact of the COVID-19 pandemic on mental health: characterization of the profile of users of a Psychosocial Care Center, in Ceará, Brazil

Lidia Sousa Pinheiro — 2025-01-01

The study aims to analyze the profile of users of a General CAPS in a city in northeastern Brazil in the context of the pandemic by COVID-1.This is a descriptive, cross-sectional and documental study, with a quali-quantitative approach. The population was made up of users of the institution and health professionals from the Psychosocial Care Center type II of Quixadá. The results obtained reveal the predominance of female users, being in 2019 (55.5%) of the open medical records, and in 2020 (59.6%).The predominant age group is 30 to 59 years. As for the marital status and educational level of users, the survey identified a higher prevalence of singles and people with incomplete elementary education. In a pandemic year (2020) there was an increase in anxiety disorders, showing a 2.2% increase compared to 2019, as well as the report of feelings of fear that had an increase of (6.2%). Also in the year 2020, 22 users cited the pandemic as the determining factor for triggering their symptoms. Other variants were on the rise such as suicidal ideation (2.5%), and attempted suicide (0.9%) compared to 2019.

Palliative care practices in long term care facility for the elderly

Isabela Velloso — 2025-01-01

Long Term Care Facilities for the elderly (LTCF) are institutions that must guarantee safe and healthy environment for their residents, which implies offering palliative care (PC) when necessary. The objective of this study was to analyze the daily PC practices offered by a multidisciplinary team in the context of LTCF. This is a qualitative study, carried out in an LTCF in Belo Horizonte, MG, with 12 professionals of the multidisciplinary team. Data were collected through semi-structured interviews and submitted to content analysis. The results shows that CP practices in the context of LTCF are configured around the organization of the routine and the environment for its development. The analysis revealed the importance of care centered on the patient's needs to ensure its quality and effectiveness. The organization of PC can favor the promotion of humanized assistance, capable of meeting physical, emotional, social and spiritual needs of the elderly, as well as their families. Furthermore, the work shared by the multidisciplinary team enhances results and maximizes the quality of care.

The profile of maternal mortality in the municipality of Niterói from 2006 to 2015: a retrospective study

Raíssa Rodrigues Organista — 2025-01-01

Maternal death is still a public health problem. The majority of maternal deaths are due to preventable or treatable causes. It is extremely important to understand the factors that increase the risks of this event, and because of this, the present study sought to describe the epidemiological profile and characteristics related to maternal mortality that occurred in the city of Niterói in the period from 2006 to 2015. This is an epidemiological study with a descriptive nature and a quantitative approach, carried out using secondary data from Death Certificates (DO`s). 77 maternal deaths were recorded, predominantly 42.85% were residents of Niterói, 75.32% of the occurrences were in public hospital services, the age group was 30 to 39 years old and 20 to 29 years old (both 40%), 56 % black people (black and brown), 65% were single, 60.88% had a level of education less than or equal to high school, 46.75% worked at home and 49.35% of the causes were other obstetric conditions not classified in other parts (O94-O99). It is concluded that the epidemiological profile of maternal mortality that occurred in the city of Niterói in the period from 2006 to 2015 was higher among women of childbearing age and economically active, black, who did not have a campaneiro, who had a low level of education, who did not have profession and place of occurrence was in hospital environments. The data observed are relevant for surveying the profile of maternal mortality in Niterói, as it will contribute to directing public health actions, specifically improving maternal health care.

Characterization of patients using warfarin in relation to functional health literacy and identification of associated factors

Gustavo Chaves de Souza — 2025-01-01

Low functional health literacy in patients on warfarin anticoagulation has been widely discussed in the literature. Objective: To identify the quality of oral anticoagulation over time and to analyze the association between this variable and functional health literacy. Prospective cohort study conducted in an anticoagulation clinic in Minas Gerais, at a high complexity hospital. The study included 81 patients, whose data were collected through direct consultation of medical records or by asking questions during the waiting period for appointments. The quality of oral anticoagulation was assessed at 6, 9, 12, 15, and 18 months after the start of the study, with analyses of the association between this variable and functional health literacy at different time points. The quality of oral anticoagulation was identified by calculating the Therapeutic Time Range (TTR), with good quality defined as TTR values >59%. Inadequate control of oral anticoagulation was observed, with only 20% of patients showing persistent improvement in TTR values over the study period. No statistically significant association was found at different measurement times between TTR and functional health literacy. There was no direct association between the quality of oral anticoagulation and functional health literacy. However, the low incidence of persistence in anticoagulation quality among patients with low literacy suggests the need for specific educational interventions for this subgroup of patients.

Late clinical outcomes of patients after Chikungunya fever

Regina Kelly Guimarães Gomes Campos — 2025-01-01

Chikungunya Fever (CF) is a disease that can progress through several phases, with late clinical outcomes, direct or indirect, and it is therefore important to evaluate how patients progress to late phases, with clinical manifestations of the disease. The article aims to analyze the prevalence of late clinical outcomes of patients reported and confirmed with CF, as well as specific health measures for treatment. A cross-sectional study was carried out in January and February 2018, with 121 patients reported and confirmed by the disease two years before data collection, in the municipality of Capistrano, Ceará. The data were analyzed using the EPI INFO 7.0 program, generating percentage frequencies, displayed in tables, subsequently interpreted and discussed with the literature on the subject. Among the direct late clinical outcomes, joint pain (118; 97.5%), musculoskeletal pain (82; 67.8%), and joint edema (54; 44.6%) were the most prevalent; in relation to indirect late clinical outcomes, decompensation of comorbidities (12; 9.9%); and, atypical manifestations such as changes in the nervous system (18; 14.9%), in the eyes (18; 14.9%) and other reasons (11; 9.1%) were the most common. Late, direct and indirect clinical outcomes are diverse and serious, implying the development of effective public policies, in favor of patients' quality of life.

Microsimulation applied to determine road capacity and Level of Service

Lucas Medina — 2025-01-01

The current urban expansion and the continuous increase in vehicles on the road system make traffic engineering crucial in modeling sustainable solutions for urban mobility. However, this field of knowledge dedicated to the study and management of vehicular flow faces increasing challenges arising from the complexity of road traffic. Traffic microsimulation, an advanced computational tool, offers the opportunity to evaluate traffic behavior in detail and the effectiveness of infrastructure projects and mobility policies. In this context, the objective of this paper is to assess the road capacity and the Level of Service (LOS) of the “S Curve” Viaduct (Praia Grande-SP, Brazil) and its surroundings, considering operational changes related to road characteristics and the vehicle flow in different periods of analysis. Traffic microsimulations were carried out using the VISSIM software, in which four models were applied for two distinct periods, the current one (2023) and the end of a 20-year time horizon (2043). In the first model, the previous operation of the viaduct was evaluated; the second and third models addressed the current operation, differing only in the access priority to the SP-055 Highway; and in the fourth model, the duplication already planned for the viaduct was considered. The results indicate that only the fourth model would result in satisfactory operational conditions for current traffic (2023). As for predicted traffic (2043), all models suggest some level of congestion, although these less satisfactory results may be associated with system overload in information processing. Future work is encouraged to calibrate the software parameters, and further investigate trends in the region.

Deformation and internal forces of statically determinate beams using discontinuity functions: development of software

Albert Willian Faria — 2025-01-01

This work presents the development of a new numerical application called "Magie", which uses mathematical discontinuity functions to calculate internal forces and generalized displacements of simply supported beams with multiple loads. Developed on the MATLAB platform, the application can calculate the bending moment M, shear force V, elastic line v(x), slopes θ(x), rotation θ, deflection v, and support reactions of simply supported, homogeneous, and isotropic beams with uniformly distributed loads, concentrated forces, and moments. Its user-friendly interface includes windows, buttons, guides, and graphs. The inputs include the geometry of the beam (positions of the supports, length, and cross-section), the applied loads, and Young's modulus (E). The numerical results obtained are validated by comparisons with exact and numerical solutions from the literature. The differential equations governing the problem are formulated in terms of discontinuity functions, reducing the number of unknowns compared to traditional solutions that use functions by beam segment. Free and in Portuguese, the application follows the national system for plotting internal force diagrams and is useful for theoretical and practical courses in engineering.

Finite Element analysis of local buckling in cold-formed steel rack columns with edge-stiffened holes

Flávio Teixeira de Souza — 2025-01-01

Cold-formed steel sections are an efficient and economical way to build structural columns. They have high slenderness due to their low thickness, thus are prone to global, local and distortional buckling. They usually have holes to fit connections or instalations, that may reduce their resistance and make their behaviour more complex. To reduce its holes bad effects, their edges may be stiffened. This work analyzes the efficiency of edge-stiffened rectangular holes in cold-formed rack colums. Finite Element analysis by software ANSYS was used to evaluate colums without holes, with non-stiffened holes, with holes containing one lateral edge stiffened end with holes containing tho lateral edges stiffened. Results indicated that adoption of one edge-stiffened lateral holes avoided local buckling between holes with lenght up to 20% higuer than columns web width, and the two edge-stiffened holes up to lenght 30% higuer than columns web width. Due to similar efficiency and considering the usual assemblage of industrial storage systems, a one edge-stiffened hole may be a reccomendation to practical uses.