论文部分内容阅读
转换桁架是转换结构中常采用的一种结构形式,也是结构受力的关键部位。结合工程实际介绍了底部带转换桁架的钢框架结构的受力性能与设计方法。基于静力弹塑性方法对结构进行抗震性能化分析,给出了结构的能力谱和需求谱,分析了结构的出铰机理,得出了结构在性能点处的弹塑性层间位移角。针对底层V形分叉柱柱脚铸钢节点进行了有限元分析,以确保关键节点具有足够的承载力。基于上述结构分析结果,给出了背景工程的结构安全评定及设计建议。
Transform truss structure is often used in the conversion of a structural form, but also the key parts of the structure force. Combined with engineering practice introduced at the bottom of the steel truss structure with the transformation of the stress performance and design methods. Based on the static elasto-plastic method, the seismic performance of the structure is analyzed. The capacity spectrum and demand spectrum of the structure are given. The out-hinge mechanism of the structure is analyzed and the displacement angle of the elastic-plastic interlayer at the performance point is obtained. Finite element analysis was carried out for the bottom V-bifurcated column foot cast steel nodes to ensure that the key nodes have sufficient bearing capacity. Based on the above structural analysis results, the structural safety assessment and design recommendations of background engineering are given.