残余应力对H形截面上弦张弦梁的影响

Influence of residual stress on BSS with H-section top chord

文章用有限元方法分析了残余应力对张弦梁结构预应力张拉阶段和工作阶段的力学影响,进行了定量评价,指出残余应力对张弦梁起着减小刚度、增大变形的消极作用,但影响不明显,在留有必要安全储备的前提下,可忽略其影响,简化设计工作。

This paper analyzes the mechanical influence of residual stress on beam string structure（BSS） in prestress-tension stage and operation stage by using finite element method.With the quantitative assessment,the paper points out that though residual stress reduces the stiffness of structure and enlarges the displacement,the negative influence is not obvious,so it can be neglected to simplify the design provided that the structure possesses necessary safe storage.