【摘要】 在张弦桁架优化设计及约束条件影响分析基础上,建立了60m、80m、100m、125m、150m跨度模型,采用振型分解反应谱法和时程分析方法对竖向地震作用进行分析,得到了小震、大震作用下结构最大动内力系数及动内力分布规律,并对大震时结构挠度与拉索是否会松弛进行了分析,用反应谱法与时程法得到的结果基本一致。本计算结果可供张弦桁架设计参考。更多还原

【Abstract】 On the basis of optimization and discussion about influence of different restrictions,five models of 60m,80m,100m,125m,and 150m span are developed.The factors and distribution of dynamic internal force are analyzed by time history method and response spectrum method,at the same time,deflection and cable slackness are also studied,the results obtained from the time history and response spectrum method are similar.The results in this paper can be referenced for the design of truss string structure.更多还原