宽扁梁宽厚比对托柱转换结构抗震性能的影响

Effect of Ratio of Wide Flat Beam Width to Thickness on the Seismic Performance of Support Column Structure

以宽扁梁式托柱转换结构工程实例为背景,针对3组宽厚比分别建立结构模型,并对结构进行模态分析、地震作用下的振型分解反应谱分析而Pushover分析。从结构模态、变形、构件内力、塑性铰分布等方面分析宽扁梁宽厚比变化对结构抗震性能影响规律。根据分析结果,初步建议宽扁梁合理宽厚比取1.8~3.0。这可为该类结构的设计提供有益的参考。

Combined with the engineering example, structural model was establ ished and the analysis of Modulation Decomposition Response Spectrum and pushover analysis were performed under the action of earthquake for wide flat beam with three different width,. The influence of the ratio of width - to - thickness of wide flat beam on the seismic performance of the structure was analyzed from the aspects of structural modal, deformation, internal force of structure, and plastic hinge distribution. According the analysis, the suggested value of the ratio can be 1.8 -3. 0. This can provide a useful reference for the design of such structures.