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框架结构局部柱铰整体屈服机制允许中柱的柱端和边柱的梁端屈服,要求边柱强度更高以避免发生层间破坏。该屈服机制的强柱弱梁条件不在于使每个节点都满足强柱弱梁的条件,而从结构整体出发要求满足基于层间柱梁强度比的强柱弱梁条件,使节点的强柱弱梁条件得以放松。基于梁铰屈服机制和部分柱铰屈服机制分别设计2组6层框架结构,利用ABAQUS有限元分析软件建立实体模型,采用Pushover方法进行推覆分析,对比不同屈服机制的层间位移角响应及构件塑性铰分布响应。结果表明,层间柱梁强度比对屈服机制的形成有重要影响,具有部分柱铰的框架结构在地震作用下的安全性不低于只允许出现梁铰的框架结构。
Frame Structure The partial column hinge overall yielding mechanism allows the column ends of the center column and the side columns of the side columns to yield, requiring a higher side column strength to avoid interlayer failure. The strong column weak beam condition of the yield mechanism is not that each node satisfies the condition of strong column weak beam, but from the overall structure, it is required to meet the condition of strong column weak beam based on the strength ratio of the interlayer column beam so that the strong column Weak beam conditions to be relaxed. Two groups of 6-story frame structures were designed based on the beam-hinged yield mechanism and the partial column-hinged yield mechanism respectively. The solid model was established by using ABAQUS finite element analysis software, and Pushover method was used for the pushover analysis. The layer displacement angular response of different yield mechanisms and the component Plastic hinge distribution response. The results show that the strength ratio of the interlayer beams has an important influence on the yield mechanism. The safety of the frame structures with partial column hinges under earthquake is not lower than that of the frame structure which only allows the beam hinges.