斜拉桥初始索力对桥跨结构的内力影响  

Impact of Initial Cable Force on Structural Behavior of A Cable-stayed Bridge

作　　者：袁月波[1] 顾萍[1] 

机构地区：[1]同济大学土木工程学院桥梁工程系,上海200092

出　　处：《中国市政工程》2007年第A02期88-90,共3页China Municipal Engineering

摘　　要：根据斜拉桥结构的受力特性和施工方案,模拟了斜拉桥建造过程,研究了初始索力对结构内力和桥梁线形的影响。研究表明:斜拉桥的初始索力对桥跨结构内力影响很大,不合理的初始索力可能导致桥跨结构受力极不合理;设计时要对斜拉桥的初始索力进行优化分析,施工过程中必须严格按设计要求完成斜拉桥的初始索力张拉,成桥后将索力调整至设计值并不能保证桥跨结构受力的合理和安全。According to the structural force characteristics and construction method of the cable-stayed bridge, the construction process thereof is simulated to study the impact of the initial cable force on the internal force of the structure and the alignment of the bridge. The study shows that the impact is great, and that improper initial cable force may cause extremely irrational force distribution on the span structure. The initial cable force must be optimized during design and the tension of the initial cable force during construction must be done strictly to the design requirement. Adjustment of the cable force to the design value after completion of the bridge cannot guarantee rational and safe force on the span structure.

关 键 词：斜拉桥 主梁 初始索力 施工 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]