悬挑梁对结构受力特性影响分析

Analysis of Influence of Cantilever Beam on Structural Mechanical Characteristics

当梁对客运站的悬挑长度为0.9 m时,分别应用高层建筑结构空间有限元分析软件(SATWE)和结构分析软件(SAP2000)进行结构计算。在风荷载、多遇地震作用下,利用SAP2000的反应谱分析和SATWE弹性分析方法,分析结构的整体稳定性,水平层间最大位移、周期比、位移比,A、B轴两榀框架的轴压比。分析表明:不同软件建模分析结果存在差异;结构增加悬挑梁后,周期比增大,X方向上的层间位移和轴压比变化较小,但Y方向上层间位移变化较大。悬挑梁对建筑结构稳定性存在一定影响。

The mechanical characteristics of a passenger station building with a 0.9 m cantilever beam were analyzed by space analysis of tall-buildings with wall-element and structure analysis program 2000 software.Under the action of wind load and frequent earthquake,the overall stability of structure,maximum displacement between horizontal layers,period ratio,displacement ratio,axial compression ratio of two frames of A and B axes were investigated using the finite element software response spectrometric analysis and elastic analysis method.The results show that there are differences with different software modeling and analysis.When the cantilever beam is added to the structure,the period ratio increases,and the variation of the interlayer displacement and the axial compression ratio in the X direction are small,but the amplitude of the displacement between the layers in the Y direction changes significantly.The cantilever beam has some effects on the stability of building structure.