【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.更多还原

【Abstract】 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.更多还原