简支变连续采用支座位移施工方法可行性分析  

Simple Support Continuous Beams using Support Displacement Method of Construction Feasibility Study

作　　者：周琦[1] 张江涛[1] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074

出　　处：《交通科技与经济》2012年第5期41-44,共4页Technology & Economy in Areas of Communications

摘　　要：为研究简支变连续T梁桥采用支座位移的施工方法,结合重庆黄泥凼中桥,对整个桥梁施工过程作模拟对比。支座位移的施工方法,首先是在简支梁阶段提升梁端支座的位移,然后在简支变连续阶段下降梁端支座的位移,从而使梁端的湿接缝现浇混凝土在二期恒载和活荷载作用前获得预压应力。这种方法简化在负弯矩区设置预应力钢绞线的过程,提高在负弯矩区的工作效率而且还降低整个项目的成本。其主要结构数据表明,它是一种在负弯矩区建立预压应力行之有效的方法。A new method on Simple support continuous beams which first lifts up the inner supports in noncomposite stages and then lays them down in composite stages, resulting in the cast-in-situ deck concrete obtains prestressed compress stresses before secondary dead loads acting. It simplifies the procedures of prestressing at negative moment region, improves the work performance of negative moment region and reduces the entire project costs. And the primary results of structure data are listed which shows that it is an effective method to build compression stresses at negative moment region.

关 键 词：简支变连续桥梁 支座位移 预压应力 湿接缝 

分 类 号：U448[建筑科学—桥梁与隧道工程]