山墙结构型式对预应力张弦桁架结构的影响研究

Research on the Influence of Gable Structure to Prestressed Truss Structure

对某跨度为124?m的预应力张弦桁架结构,研究山墙结构采用"上刚下铰""上弹下铰"和"上刚下刚"三种不同连接节点时的结构受力特性,通过MIDAS有限元分析软件进行内力分析,得出在三种山墙结构型式下结构的内力分布、柱脚反力以及整体位移的变化规律。

For a 124?m span prestressed string truss structure,the structural stress characteristics of gable truss structure adopted three different joints of "upper rigid lower hinge","upper elastic lower hinge" and "upper rigid lower rigid" is discussed here.The internal force was analyzed by MIDAS finite element analysis software.The variation rules of internal force distribution,column foot reaction force and overall displacement under three types of gable structure are obtained.