斜拉桥成桥及施工阶段的索力优化  

Optimizing Cable Tension During Construction and Completion of a Cable-Stayed Bridge

作　　者：张文献[1] 刘旭光[1] 李东炜 欧丹[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004 [2]中铁九局,辽宁沈阳110200

出　　处：《东北大学学报（自然科学版）》2009年第8期1201-1204,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50778035);黑龙江省交通厅科研项目(311098)

摘　　要：为了在斜拉桥成桥过程中合理优化施工索力,以期实现设计思想,利用MIDAS/Civil软件对在建的某斜拉桥进行了有限元分析,实现了对该桥成桥阶段和施工阶段的索力模拟计算.分别采用刚性支承连续梁法、零位移法、弯曲能量最小法确定恒载初始索力,并对这些方法加以比较;认为仅用上述的一种方法对索力进行优化,局限性很大,提出利用综合法计算成桥索力,可达到满意的优化效果.采用正装分析法对各施工工况进行仿真,绘制出施工阶段的索力时程曲线,用于该桥施工控制过程,获得了满意效果.To rationally optimize the cable tension in the construction process of a cable-stayed bridge so as to realize the idea of design, the software MIDAS/Civil was used for FEA to a cable- stayed bridge being constructed. Then, the cable tension during construction and completion of the bridge was calculated through numerical simulation. With the methods of rigid support continuous beam, zero-displacement and bending energy minimization used separately to determine the initial cable tension under the dead load, the different results were compared with each other and supposed that using a single method mentioned above to optimize the cable tension is significantly limited. A comprehensive method is therefore proposed to calculate the cable tension, by which a favorable optimization result is available. Each construction step is simulated by the orderly-erecting analysis, then the relevant time-dependent cable tension curve was plotted to control the construction process of the bridge, thus providing a satisfactory effect.

关 键 词：斜拉桥 索力优化 成桥状态 索力时程曲线 有限元分析 正装分析 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]