论文部分内容阅读
为了获得自锚式悬索桥施工阶段结构体系转换过程中各构件的受力状况及成桥后结构的力学性能,利用优化方法计算了缆索系统的安装过程,并对三汊矶湘江大桥进行了缩尺比例为1∶28的整体模型试验。介绍了优化计算的原理以及模型设计、试验方案的细节,并对施工过程中顶升主梁进行吊索的无应力安装过程以及活载作用下结构力学性能的测试和计算作了详细说明。结果表明:模型试验的测试结果与计算值吻合良好,吊索的无应力安装能够满足施工阶段的受力要求并达到设计成桥线形;活载作用下结构挠度、应力与荷载呈线性关系,叠加原理能够适用。
In order to obtain the stress state of each component and the mechanical properties of the structure after the completion of the structural system transition of the self-anchored suspension bridge, the installation process of the cable system was calculated by the optimization method and the scale of the Xiangjiang River Bridge Overall model test at a ratio of 1:28. The principle of the optimization calculation, the details of the model design and the test scheme are introduced. The stress-free installation of the sling during the construction and the testing and calculation of the structural mechanical properties under live load are described in detail. The results show that the test results of the model test are in good agreement with the calculated values. The stress-free installation of the sling can meet the force requirements of the construction stage and reach the design of bridge linearity. The deflection, stress and load of the structure under load have a linear relationship, The principle can be applied.