Elastoplastic analysis of reinforced concrete space frames using the uniaxial and biaxial bending method

IF 0.6 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Acta Scientiarum-technology Pub Date : 2022-08-26 DOI:10.4025/actascitechnol.v45i1.60188
P. Vieira, W. T. M. Silva
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Abstract

The scope of the work involves reinforced concrete frame structures with variations in structural design conception for columns with biaxial bending or uniaxial bending. The beams are designed with simple bending criteria for singly or doubly reinforced beams, or uniaxial bending. The analysis and design criteria are according to NBR 6118:2014. Structure analysis in elastoplastic regimen with the incremental analysis method is performed to detect plastic hinge formation order, collapse load factor, displacements, and rotation capacity of cross sections with the criteria established in the current building codes. The study evaluates the influence of the defined concepts on the structure’s elastoplastic behavior. The biaxial and uniaxial bending method is presented as an important formulation for obtaining the collapse load factor using the elastic stiffness matrix with modifications. The algorithms presented enable the development of research without the need for expensive commercial software licenses.
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钢筋混凝土空间框架的单轴和双轴弯曲弹塑性分析
工作范围涉及钢筋混凝土框架结构与结构设计概念的变化与双轴弯曲或单轴弯曲柱。梁的设计采用简单的弯曲准则,适用于单筋或双筋梁,或单轴弯曲。分析和设计标准根据NBR 6118:2014。采用增量分析方法对弹塑性结构进行分析,根据现行建筑规范的标准,检测塑性铰形成顺序、倒塌荷载系数、截面位移和旋转能力。该研究评估了定义的概念对结构弹塑性行为的影响。提出了双轴和单轴弯曲法,这是利用修正后的弹性刚度矩阵获得倒塌荷载系数的重要公式。所提出的算法使研究的发展不需要昂贵的商业软件许可证。
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来源期刊
Acta Scientiarum-technology
Acta Scientiarum-technology 综合性期刊-综合性期刊
CiteScore
1.40
自引率
12.50%
发文量
60
审稿时长
6-12 weeks
期刊介绍: The journal publishes original articles in all areas of Technology, including: Engineerings, Physics, Chemistry, Mathematics, Statistics, Geosciences and Computation Sciences. To establish the public inscription of knowledge and its preservation; To publish results of research comprising ideas and new scientific suggestions; To publicize worldwide information and knowledge produced by the scientific community; To speech the process of scientific communication in Technology.
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