连体桁架结构优化比选分析

Analysis on Structural selection of Connected Truss

为探析三种桁架结构方案的合理性,以某高校实训楼连接体为例建立模型,从动力特性、内力分布、变形特点、抗连续倒塌性能四个方面进行优化比选。结果表明:交叉桁架安全性能最高,斜拉空腹桁架最为经济合理,且兼顾美观,但抗连续倒塌能力不足,其应用须结合实际。

In order to analyze the rationality of 3 kinds of truss schemes,taking the connecting body as an example to establish the models,and the optimization comparison is carried out from 4 aspects such as dynamic performance,internal force distribution,deformation performance and anti-progressive collapse performance.It is concluded that the cross truss has the highest safety performance,and the cable-stayed Vierendeel truss is the most economical and reasonable,which takes into account the aesthetic requirements of the building,but its ability to resist progressive collapse is insufficient,so its application should be combined with practice.