钢网格盒式结构多模态静力弹塑性分析

Study on Model Pushover Analysis of Steel Grid Box-like Structure

该文以某一12层住宅作为研究对象,分别建立钢网格盒式结构模型和普通钢框架结构模型。通过多遇地震烈度下结构抗震设计,采用MPA分析法计算两种结构在罕遇烈度下的目标位移,对比分析两种体系的侧移刚度、层位移、层间位移角以及高阶振型影响。结果表明:盒式结构的抗震设计指标满足规范,并且优于框架结构;盒式结构抵抗罕遇地震的能力强于框架结构,高阶振型影响小于框架结构。

In this paper, based on the research object of a 12-storey residential b u ild in g , the steel g rid b o x -like structure model and the ordinary steel frame structure model were respectively established. Through the structural seismic design for frequent earthquake intensities, the MPA method was used to calculate the target displacements of the two structures under rare earthquake intensities, with the lateral displacement stiffness, layer displace-ment, interlayer displacement angle and high-order vibration modes of the two systems comparatively analyzed. The results show that the seismic de-sign index of the box-like structure meets the standard and is superior to the frame structure; the box-like structure has greater anti-seismic property inrare earthquakes than the frame structure, and its high-order vibration effect is less than that of the frame structure.