用应力平衡法确定斜拉桥主梁的合理成桥状态  

Deciding the reasonable finished dead state of the main beam of Cable-stayed bridges using stress balanced method

作　　者：颜东煌[1] 李学文[2] 刘光栋[1] 易伟建[1] 

机构地区：[1]湖南大学路桥工程系,湖南长沙410082 [2]长沙交通学院路桥工程系,湖南长沙410076

出　　处：《中国公路学报》2000年第3期49-52,共4页China Journal of Highway and Transport

摘　　要：根据主梁截面上、下缘的正应力控制条件 ,综合考虑活载作用以及斜拉索索力对主梁成桥恒载弯矩的可调性 ,确定斜拉桥主梁的合理预加力数量和相应的恒载弯矩合理域 ,并根据实际配置的预加力确定主梁恒载弯矩可行域 。According to normal stress controlling conditions on the top and bottom of beam section, considering live load action and adjustability of cable forces for the dead moments on the finished state of the main beam, this paper decides the reasonable prestressing quantity and the relative reasonable limits of dead moments. It can decide the feasible eimits of dead moments of the main beam if the prestress has been given. The results can provide background data for deciding the reasonable finished dead state of the total structure of cable stayed bridges.

关 键 词：斜拉桥 主梁 预应力 合理成桥状态 应力平衡法 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]