初始预应力值对张弦梁结构受力性能的影响

张弦梁结构的工作性能受到拉索初始预应力的影响。从内力和变形的角度对张弦梁结构进行了理论分析,并通过建立有限元模型运用SAP2000对张弦梁结构进行了有限元分析,验证了有限元分析结果与理论分析结果的一致性,进而由有限元计算结果分析初始预应力对结构受力性能的影响。分析结果表明,初始预应力的合理取值可以改善结构的内力分布,而对结构的竖向挠度和支座位移的影响很小。

Research of initial pre - stress on mechanical performance of beam string structure

The value of the cable initial pre-stress has effect on the working performance of beam string structure(BSS).Theoretic and finite element methods were both used to analyze the inner force and deformation of BSS.It proved that finite element method which is accomplished by SAP2000 accorded with the theoretic one,thus SAP2000 were used to study the influence of initial pre-stress on mechanical performance.The result shows that rational value of the cable initial pre-stress can improve the internal force distribution of the structure,but do less influence on the vertical flexibility and support displacement.