scholarly journals Analisis Kekuatan Kolom Beton Bertulang Berdasarkan Diagram Interaksi Kolom

2021 ◽  
Vol 3 (2) ◽  
pp. 125-134
Author(s):  
Indra Dody Kurniawan Manguki' ◽  
Jonie Tanijaya ◽  
Olan Jujun Sanggaria
Keyword(s):  
Bending Moment ◽  
Axial Loads ◽  
Microsoft Excel ◽  
Cross Sectional ◽  
Boundary Area ◽  
Interaction Diagram ◽  
Circular Column ◽  
Steel Strength ◽  
Concrete Quality ◽  
Failure Conditions

The column interaction diagram is a boundary area graph showing the various combinations of axial loads and moments that the column can safely hold. The benefit of a column interaction diagram provides an overview of the strength of the column in question. This study aims to analyze rectangular and circular columns using column interaction diagrams and then compare the strength of the columns in withstanding a combination of axial loads and bending moments with the same area. In this study, square and circular columns have the same number of reinforcement, diameter of reinforcement, steel strength, concrete quality, and cross-sectional area. The column is reviewed based on five conditions, namely pure axial load conditions, pure bending moment, and three failure conditions. Based on the five conditions that occurred, a column interaction diagram was created by using Microsoft Excel. Results of the analysis show that in the same area, the square column is stronger in withstanding the bending moment (Mu) of the circular column by 0.015 - 0.61%, while the circular column is stronger in resisting the axial force (Pu) of the square column by 1,9 - 4.4%.

scholarly journals Parametric study of the strength of reinforced concrete polygonal sections submitted to oblique composite flexion

2020 ◽  
Vol 13 (5) ◽  
Author(s):  
Lucas Peres de Souza ◽  
Marco André Argenta
Keyword(s):  
Reinforced Concrete ◽  
Axial Load ◽  
Bending Strength ◽  
Computational Algorithm ◽  
Bending Moment ◽  
Failure Surface ◽  
Surface Shape ◽  
Axial Loads ◽  
Interaction Diagram ◽  
Cylinder Strength

abstract: This work aims to verify the influence of characteristic compressive cylinder strength ( f c k), section geometry and eccentric axial load on the strength of square, cross, “T” and “L” reinforced concrete sections, under oblique composite flexion. A computational algorithm was created to calculate sections interaction diagram of bending strength, taking into account NBR 6118 idealized parabola-rectangle stress-strain relationships for 20 to 90 MPa f c k concretes. The results show that f c k influence is stronger for higher values of axial load and that the failure surface shape in interaction diagrams depends directly on the f c k and on the rebars distribution in the section. Furthermore, under lower compressive axial loads, higher oblique composite flexion strengths are reached when there is more reinforcement area in tension regions but, as the compression increases, the reinforcement presence and larger concrete areas in compression zones provide higher bending moment strengths.

scholarly journals INTERACTION DIAGRAMS AXIAL FORCE-BENDING MOMENT FOR FIRE EXPOSED STEEL-CONCRETE COMPOSITE SECTIONS

2016 ◽  
Author(s):  
Milivoje Milanovic ◽  
Meri Cvetkovska
Keyword(s):  
Bearing Capacity ◽  
Cross Section ◽  
Axial Force ◽  
Bending Moment ◽  
Cross Sectional ◽  
Load Bearing ◽  
Composite Columns ◽  
Interaction Diagram ◽  
Steel Sections ◽  
The Cross

The bearing capacity of the column cross section can be determined from the interaction diagram moment-axial force (M–N). Fire induced temperatures cause reduction of the load-bearing characteristics of the constitutive materials, steel and concrete, and this effect directly reflects on the reduction of the axial force and the bending moment that could be accepted by the column cross section, respectively the interaction diagram of the column cross section is changed. The load bearing capacity of the steel-concrete composite columns exposed to fire from all four sides and loaded by axial force and uni-axial or bi-axial bending moments, was estimated on the basis of the changes in the interaction diagrams moment-axial force amd the results are presented in this paper. Different types of composite columns made of totally or partially encased steel sections, or concrete filled hollow sections were analyzed and a detailed discussion on the effects of the shape of the cross section and the cross sectional dimensions are presented.

scholarly journals Near-Fault Seismic Response Analysis of Bridges Considering Girder Impact and Pier Size

Mathematics ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 704
Author(s):  
Wenjun An ◽  
Guquan Song ◽  
Shutong Chen
Keyword(s):  
Seismic Response ◽  
Bending Moment ◽  
Expansion Method ◽  
Response Analysis ◽  
Seismic Action ◽  
Transient Wave ◽  
Cross Sectional ◽  
Displacement Response ◽  
Near Fault ◽  
Continuous Girder Bridge

Given the influence of near-fault vertical seismic action, we established a girder-spring-damping-rod model of a double-span continuous girder bridge and used the transient wave function expansion method and indirect modal function method to calculate the seismic response of the bridge. We deduced the theoretical solution for the vertical and longitudinal contact force and displacement response of the bridge structure under the action of the near-fault vertical seismic excitation, and we analyzed the influence of the vertical separation of the bridge on the bending failure of the pier. Our results show that under the action of a near-fault vertical earthquake, pier-girder separation will significantly alter the bridge’s longitudinal displacement response, and that neglecting this separation may lead to the underestimation of the pier’s bending damage. Calculations of the bending moment at the bottom of the pier under different pier heights and cross-sectional diameters showed that the separation of the pier and the girder increases the bending moment at the pier’s base. Therefore, the reasonable design of the pier size and tensile support bearing in near-fault areas may help to reduce longitudinal damage to bridges.

Combined flexure and torsion of I-shaped steel beams

1989 ◽  
Vol 16 (2) ◽  
pp. 124-139 ◽  
Author(s):  
Robert G. Driver ◽  
D. J. Laurie Kennedy
Keyword(s):  
Limit State ◽  
Bending Moment ◽  
Phase Behaviour ◽  
Inelastic Interaction ◽  
Steel Beams ◽  
Ultimate Limit State ◽  
Second Phase ◽  
Design Standards ◽  
Limit States ◽  
Interaction Diagram

Design standards provide little information for the design of I-shaped steel beams not loaded through the shear centre and therefore subjected to combined flexure and torsion. In particular, methods for determining the ultimate capacity, as is required in limit states design standards, are not presented. The literature on elastic analysis is extensive, but only limited experimental and analytical work has been conducted in the inelastic region. No comprehensive design procedures, applicable to limit states design standards, have been developed.From four tests conducted on cantilever beams, with varying moment–torque ratios, it is established that the torsional behaviour has two distinct phases, with the second dominated by second-order geometric effects. This second phase is nonutilizable because the added torsional restraint developed is path dependent and, if deflections had been restricted, would not have been significant. Based on the first-phase behaviour, a normal and shearing stress distribution on the cross section is proposed. From this, a moment–torque ultimate strength interaction diagram is developed, applicable to a number of different end and loading conditions. This ultimate limit state interaction diagram and serviceability limit states, based on first yield and on distortion limitations, provide a comprehensive design approach for these members. Key words: beams, bending moment, flexure, inelastic, interaction diagram, I-shaped, limit states, serviceability, steel, torsion, torque, ultimate.

Geometrical Stiffness of Thin-Walled I-Beam Element Based on Rigid-Beam Assemblage Concept

2012 ◽  
Vol 28 (1) ◽  
pp. 97-106 ◽  
Author(s):  
J. D. Yau ◽  
S.-R. Kuo
Keyword(s):  
Stiffness Matrix ◽  
Virtual Work ◽  
Bending Moment ◽  
Beam Element ◽  
Narrow Beam ◽  
Cross Sectional ◽  
Geometric Stiffness ◽  
Buckling Behavior ◽  
Post Buckling ◽  
Thin Walled

ABSTRACTUsing conventional virtual work method to derive geometric stiffness of a thin-walled beam element, researchers usually have to deal with nonlinear strains with high order terms and the induced moments caused by cross sectional stress results under rotations. To simplify the laborious procedure, this study decomposes an I-beam element into three narrow beam components in conjunction with geometrical hypothesis of rigid cross section. Then let us adopt Yanget al.'s simplified geometric stiffness matrix [kg]12×12of a rigid beam element as the basis of geometric stiffness of a narrow beam element. Finally, we can use rigid beam assemblage and stiffness transformation procedure to derivate the geometric stiffness matrix [kg]14×14of an I-beam element, in which two nodal warping deformations are included. From the derived [kg]14×14matrix, it can take into account the nature of various rotational moments, such as semi-tangential (ST) property for St. Venant torque and quasi-tangential (QT) property for both bending moment and warping torque. The applicability of the proposed [kg]14×14matrix to buckling problem and geometric nonlinear analysis of loaded I-shaped beam structures will be verified and compared with the results presented in existing literatures. Moreover, the post-buckling behavior of a centrally-load web-tapered I-beam with warping restraints will be investigated as well.

CHILDREN'S AWARENESS OF MEDICINES, DRUG COMPLIANCE AND HEALTH PROTECTION DURING COVID 19 PANDEMIC: A DETAILED CROSS SECTIONAL STUDY

2021 ◽  
pp. 20-24
Author(s):  
Radhika Vijay
Keyword(s):  
Cross Sectional Study ◽  
Sectional Study ◽  
Great Role ◽  
Drug Compliance ◽  
Online Questionnaire ◽  
Microsoft Excel ◽  
Cross Sectional ◽  
North West ◽  
Adult Lives ◽  
Prevention Of Infections

OBJECTIVES: Nobody is refrained from the use of medications in today's times, not even kids,The objective of this study is to focus on the knowledge and awareness level, perception, of children of primary and secondary grade towards medicines , prevention of Infections and Diseases and drug compliance. This descriptive, cross sectional observational study was done METHODS: amongst the kids of North West Rajasthan ,India from August 2020 to October 2020 via an online questionnaire . A sample size of 100 kids , 50 each from Primary and Secondary grade was chosen for the study. The data was entered in Microsoft Excel and was statistically analysed. Results are outcomes of various RESULTS: questions put up to conduct detailed analysis of kids' awareness and medicinal knowledge, drug preferences, factors inuencing and attitude related to hygiene, safety and protection from Covid 19 infection. Kids are the young budding phys CONCLUSION: icians and their childhood beliefs and perceptions might affect their behaviour and decisions in adult lives. Parents and schools can play a great role through educational programs . It's well said, “Children are like wet cement, whatever falls on them, leaves an impression.”

Investigation of Smooth Pipe Bends Under the Effect of In-Plane Bending

2017 ◽  
Author(s):  
Diana Abdulhameed ◽  
Michael Martens ◽  
J. J. Roger Cheng ◽  
Samer Adeeb
Keyword(s):  
High Stress ◽  
Circular Cross Section ◽  
Bending Moment ◽  
Bend Angle ◽  
Bending Moments ◽  
Bend Radius ◽  
Pipe Bend ◽  
Cross Sectional ◽  
Smooth Pipe ◽  
Plane Bending

Pipe bends are frequently used to change the direction in pipeline systems and they are considered one of the critical components as well. Bending moments acting on the pipe bends result from the surrounding environment, such as thermal expansions, soil deformations, and external loads. As a result of these bending moments, the initially circular cross-section of the pipe bend deforms into an oval shape. This consequently changes the pipe bend’s flexibility leading to higher stresses compared to straight pipes. Past studies considered the case of a closing in-plane bending moment on 90-degree pipe bends and proposed factors that account for the increased flexibility and high-stress levels. These factors are currently presented in the design codes and known as the flexibility and stress intensification factors (SIF). This paper covers the behaviour of an initially circular cross-sectional smooth pipe bend of uniform thickness subjected to in-plane opening/closing bending moment. ABAQUS FEA software is used in this study to model pipe bends with different nominal pipe sizes, bend angles, and various bend radius to cross-sectional pipe radius ratios. A comparison between the CSA-Z662 code and the FEA results is conducted to investigate the applicability of the currently used SIF factor presented in the design code for different loading cases. The study showed that the in-plane bending moment direction acting on the pipe has a significant effect on the stress distribution and the flexibility of the pipe bend. The variation of bend angle and bend radius showed that it affects the maximum stress drastically and should be considered as a parameter in the flexibility and SIF factors. Moreover, the CSA results are found to be un-conservative in some cases depending on the bend angle and direction of the applied bending moment.

scholarly journals Perfil dos diagnósticos de enfermagem de fumicultores

2019 ◽  
Vol 13 ◽  
Author(s):  
Naise de Moura Dantas ◽  
Alexandre Wendell Araujo Moura ◽  
Andreivna Kharenine Serbim ◽  
Cristiane Araujo Nascimento ◽  
Ana Caroline Melo dos Santos ◽  
...  
Keyword(s):  
Elementary Education ◽  
Family Health ◽  
Cross Sectional Study ◽  
Microsoft Excel ◽  
Cross Sectional ◽  
Safety Standards ◽  
The North ◽  
Nursing Diagnosis ◽  
Quantitative Descriptive ◽  
Nursing Diagnoses

RESUMO Objetivo: descrever os diagnósticos de Enfermagem segundo a taxonomia da American Nursing Diagnosis Association II.  Método: trata-se de estudo quantitativo, descritivo, transversal, com 51 produtores de tabaco expostos a agroquímicos que viviam na comunidade rural. Coletaram-se os dados por meio das consultas de Enfermagem. Tabularam-se os dados n Programa Microsoft Excel 2010, posteriormente inseridos no banco de dados utilizando o programa SPSS, versão 22.0, for Windows, e submetidos à revisão e análise estatística. Apresentaram-se os resultados em tabelas. Resultados: verificou-se, por meio das consultas de Enfermagem, que a maioria era do sexo feminino, tinha ensino fundamental incompleto e não praticava nenhum tipo de exercício físico. Acrescenta-se, além disso, que eles desconheciam os riscos para a saúde colocados pelos pesticidas e negligenciaram os padrões de segurança recomendados para o manuseio desses produtos. Conclusão: pode-se observar, a partir deste estudo, que o enfermeiro tem um papel importante no cuidado e na educação, nos diversos espaços de promoção, prevenção e manutenção do cuidado em saúde. Descritores: Enfermagem; Diagnósticos de Enfermagem; Estratégia Saúde da Família; Área Rural; Saúde Pública; Saúde do Trabalhador.ABSTRACT Objective: to describe Nursing diagnoses according to the Taxonomy II proposed by the North American Nursing Diagnosis Association. Method: this is a quantitative, descriptive, cross-sectional study conducted with co plantations. The research was carried out with 51 tobacco growers exposed to agrochemicals living in the rural community. The data were collected through nursing consultations. The data collected were tabulated in the Microsoft Excel 2010 software and later entered into a database using the SPSS software version 22.0, for Windows, and subjected to statistical review and analysis. The results were presented in tables. Results: the Nursing consultations revealed that the majority of the farm workers were females, had incomplete elementary education, and did not practice any type of physical exercise. In addition, they were unaware of the health risks posed by pesticides and neglected the recommended safety standards for the handling of these products. Conclusion: it was observed in this study that nurses have an important role in care and education, in the various spaces of promotion, prevention and maintenance of health care. Descriptors: Nursing; Nursing Diagnoses; Family Health Strategy; Rural Area; Public Health; Occupational Health.RESUMEN Objetivo: se buscó describir los diagnósticos de Enfermería según la taxonomía de la American Nursing Diagnosis Association II. Método: se trata de un estudio cuantitativo, descriptivo, transversal, realizado con 51 productores de tabaco expuestos a agroquímicos que vivían en la comunidad rural. Se recogieron los datos por medio de las consultas de Enfermería. Se tabularon los datos recogidos en el programa Microsoft Excel 2010, posteriormente inseridos en el banco de datos utilizando el programa SPSS, versión 22.0, for Windows, y sometidos a la revisión y análisis estadística. Se presentaron los resultados en tablas. Resultados: se verificó, por medio de las consultas de Enfermería, que la mayoría era del sexo femenino, tenía enseñanza primaria incompleta y no praticaba ningún tipo de ejercicio físico. Además de eso, ellos desconocen los riesgos para la salud colocados por los pesticidas y negligenciaron los patrones de seguridad recomendados para el manoseo de esos productos. Conclusión: se puede observar, a partir de este estudio, que el enfermero tiene un papel importante en el cuidado y en la educación, en los diversos espacios de promoción, prevención y mantenimiento del cuidado en salud. Descriptores: Enfermería; Diagnósticos de Enfermería; Estrategia Salud de la Familia; Zona Rural; Salud Pública; Salud Laboral.

scholarly journals Nutritional status among children aged one to six years in tribal area

2020 ◽  
Vol 7 (7) ◽  
pp. 2715
Author(s):  
Palle Lokhnath Reddy ◽  
Aluka Anand Chand
Keyword(s):  
Nutritional Status ◽  
Normal Growth ◽  
Good Health ◽  
World Health ◽  
Microsoft Excel ◽  
Cross Sectional ◽  
Tribal Area ◽  
South Indian ◽  
Health Organization ◽  
Severe Degree

Background: Nutrition in children is considered as a major concern for good health and also for normal growth and development. The present study aimed to estimate the prevalence of malnutrition in 1 to 6 years children.Methods: This was a community based cross sectional carried out in a south Indian tribal area for a period of 5 years among 1020 children. The anthropometric measurements categorization among children was done using world health organization (WHO) guidelines. Data was analyzed using microsoft excel 2010.Results: Out of 1020 children, nutritional status based on underweight, stunting and wasting was 30.80%, 26.8% and 15.68% respectively. Severe degree of underweight, stunting and wasting was observed in 76.4%, 64.7% and 5.49% respectively.Conclusions: Under nutrition was significantly high in infants and it decreased with increasing in age and significantly higher number of female children were stunted and underweight compared to male children.

scholarly journals Prevalence and costs of hospitalizations for poisoning and accidental intoxication in Brazilian elderly

2013 ◽  
Vol 49 (4) ◽  
pp. 679-687
Author(s):  
Marcelle Silva de Abreu ◽  
Silvandro Diego de Albuquerque Ferreira ◽  
Larissa Pelágia de Lima Ferreira ◽  
José Ferreira Toneo Júnior ◽  
Wamberto Vieira Maciel ◽  
...  
Keyword(s):  
Hospital Admissions ◽  
Average Length ◽  
Length Of Hospital Stay ◽  
Secondary Data ◽  
Mortality Rates ◽  
Cross Sectional Study ◽  
Microsoft Excel ◽  
Cross Sectional ◽  
Alcohol And Drugs ◽  
Elderly Males

A cross-sectional study of secondary data/information obtained from the Hospital Information System (HIS) spanning the years 2008 - 2009 was performed. The distribution of the main hospital admissions by gender, age, color/race, region and federal unit of residence, average expenditure and average length of hospital stay, year of hospitalization and mortality rates (MR) were studied. The data collected were tabulated by TabNet and keyed into Microsoft Excel 2007. It was verified that elderly males (54.3%), from 60 to 69 years old (50.6%), nonwhites (36.3%) and residents of Southeast and North regions of the country had the highest rates of hospitalization. Seniors were hospitalized for an average of 4.8 days, and the major causes were exposure to alcohol (43.7%) and to drugs (33.9%). Expenses related to hospital admissions were, on average, R$ 529,817.70. The highest mortality rates were recorded among females (MR = 4.34), in elderly, 80 years or older (MR = 10.16) and Caucasians (MR = 3.95), where pharmacological substances with action on the Autonomic Nervous System were the leading cause of death. There are demographic differences in morbi-mortality of these elderly since, although men and younger elderly were the main victims, women and elderly of advanced age have greater mortality. The leading causes of hospitalization were alcohol and drugs.

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