论文部分内容阅读
采用有限元软件SAP2000对中柱失效时多层钢筋混凝土(RC)平面框架抗连续倒塌性能进行了非线性静力分析,研究其抗倒塌的承载力及其对应的荷载传递机理。在模型验证的基础上,对不同加载方式、约束条件、不同跨数的模型及子结构的选取形式进行了分析,并通过结构抗力曲线、各层梁内力变化的对比,研究了平面框架的荷载传递机理。结果表明:荷载施加方式对各层梁内力影响较小,但对于各层中柱轴力分布影响较大;平面框架跨数的增加和空间框架均对所研究的多层平面框架抗力曲线影响不大,但相应梁柱的内力均发生了较大变化;平面框架仅能在一定程度上反映实际结构的受力机理,其与空间子结构中的平面部分还略有差异。
Using the finite element software SAP2000, the non-linear static analysis of the anti-continuous collapse behavior of multi-story reinforced concrete (RC) plane frames with failure of the center column was carried out to study the bearing capacity of anti-collapse and the corresponding load transfer mechanism. On the basis of the model verification, the paper analyzes the models of different loading methods, constraints, different spans and the selection forms of substructures. Through the comparison of the structural resistance curves and the changes of the internal forces of the beams, the effects of the load on the planar frame Transfer mechanism. The results show that the mode of load exerts little influence on the internal force of each layer but exerts a great influence on the distribution of axial force in each layer. The increase of the span of the plane frame and the influence of the space frame on the resistance curve of the multi-layer plane frame However, the internal forces of the corresponding beam and column all changed greatly. The plane frame can only reflect the mechanical mechanism of the actual structure to a certain degree, which is slightly different from the plane part of the space substructure.