在水平荷载作用下不规则建筑结构的弹塑性反应综述

Review of Inelastic Behavior of Asymmetric Buildings under Lateral Loads

建筑结构在强震作用下的变形通常进入非弹性阶段,特别是不规则建筑结构,由于平动与扭转耦合效应使之在强震作用下的弹塑性更为复杂。因此,这方面的研究还存在相当大的难度,当前并没有形成较为一致的结论。本文着重探讨了建模、刚度偏心、质量偏心和强度偏心等因素对不规则建筑结构弹塑性反应的影响,对不规则建筑结构的弹塑性反应做了简要评述,指出文献中存在分歧和矛盾的主要原因,以便为更深入地开展不规则建筑的地震反应分析做必要的准备。

Buildings subjected to a large intensity ground motion often deform well into the inelastic range.In particular asymmetric buildings undergo coupled inelastic lateral and torsional deformations that couldbe more complex. Hence there are many difficulties for studies in this field, and some controversies stillexist. This paper focuses on the effects of modelling, stiffness, strength, and mass eccentricities on the in-elastic behavior of asymmetric building systems under lateral loads. The elastic behavior of asymmetricbuildings under lateral loads is related to stiffness and mass eccentricities, while the inelastic behavior ofasymmetric buildings under lateral loads is dependent upon modeling, stiffness eccentricity, mass eccen-tricity and strength eccentricity as well. The strength eccentricity can more exactly reflect the inelastic be-havior of asymmetric buildings under lateral loads than stiffness eccentricity. A brief summary on the in-elastic behavior of asymmetric buildings under lateral loads is provided in this paper. The existing studiesarrived at different, and even contradicting conclusions, the causes of which are explored in this paper.