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在结构设计中,填充墙通常被当作非结构构件,不参与结构抗震计算。在实际地震作用下,填充墙和框架成为整体,共同抵抗地震作用,合适的墙-框连接方式可以减轻二者的相互作用,从而提高结构整体抗震性能。首先,运用ABAQUS软件对前人已开展的考虑墙-框不同连接方式的框架结构拟静力试验进行数值模拟,验证了所建立的有限元模型的可靠性。然后,基于某典型框架结构,建立三种墙-框连接方式的框架结构有限元模型并进行分析。模态分析表明,墙-框连接方式对框架结构的振型及周期影响较小,结构动力特性趋于一致。通过多遇地震和罕遇地震下的弹塑性时程分析,对比分析各结构的加速度反应、位移反应、滞回耗能及构件震害特征等可知,合理的墙-框连接方式可以提高结构抗震性能。针对本文框架结构工程实例,采用墙-框脱开密封材料封缝,构造柱加水平系梁的连接方式时其抗震性较好。
In structural design, infill walls are often treated as non-structural components and do not participate in structural seismic calculations. Under the action of actual earthquake, the infill walls and the frame are integrated to resist earthquakes. The appropriate wall-frame connection mode can reduce the interaction between the two and improve the overall seismic performance of the structure. First, ABAQUS software is used to simulate the pseudo-static test of frame structure which has been carried out by predecessors considering different connection ways of wall-frame, which verifies the reliability of the established finite element model. Then, based on a typical frame structure, three kinds of frame-structure finite element models of wall-frame connection are established and analyzed. The modal analysis shows that the wall-frame connection mode has less influence on the mode shape and period of the frame structure, and the dynamic characteristics of the structure tend to be consistent. Through the elasto-plastic time history analysis of frequent earthquakes and rare earthquakes, it is found that the reasonable wall-frame connection mode can improve the seismic performance of structures by comparing the acceleration responses, displacement reactions, hysteresis energy dissipation and seismic damage characteristics of each structure. performance. Aiming at the engineering example of the frame structure in this paper, the wall-frame is used to seal off the sealing material, and the connection between the structural column and the horizontal tie beam is better.