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采用ANSYS软件对3个单层单跨开洞率不同的填充墙钢筋混凝土框架水平荷载试验模型进行了非线性分析,由分析结果可得计算值与试验结果吻合良好。用同样的模拟方法,对5个单层双跨不同填充墙高度的钢筋混凝土框架模型进行了水平荷载作用下的全过程模拟分析。研究结果表明,随着填充墙高度的增大,填充墙框架结构侧移刚度和水平承载力显著提高,结构延性相对降低;框架结构开裂荷载有所提高,但框架柱原有的“强剪弱弯”性能可能改变,出现箍筋先于纵筋屈服的不利情况;框架柱上段剪力值比原纯框架柱有明显增大,各跨墙高不等时,增幅更大;按照现行结构设计方法,框架柱正截面和框架梁弯、剪承载力设计是安全的,但是框架柱斜截面抗剪承载力的设计存在极大的安全隐患。
The ANSYS software was used to analyze the horizontal load test model of three different single-span single-span infill walls with reinforced concrete frame. The calculated results agree well with the experimental results. The same simulation method was used to simulate the whole process of five reinforced concrete frame models with single-wall and double-span filled walls with different horizontal loads. The results show that with the increase of infill wall height, the lateral stiffness and horizontal bearing capacity of the infilled wall frame significantly increase, and the ductility of the infilled wall structure decreases. The cracking load of the frame structure increases, but the original “ Weak bending ”performance may change, the emergence of stirrups precede the adverse conditions of longitudinal reinforcement yield; Shear section of the upper column than the original pure frame column significantly increased, the span of the wall height ranged from a larger increase; according to the current The structural design method, the positive cross-section of frame columns and the beam bending and shear bearing capacity of frame are safe, but the design of shear strength of diagonal cross-section of frame columns has great potential safety hazard.