双层索面人行悬索桥状态反演研究

Study on State Inversion of Double-plane Pedestrian Suspension Bridge

摘要:

悬索桥的检测，由于吊杆力、索力难以直接测量，一般通过测量主缆的线形来确定悬索桥的状态。采用桥面索的人行悬索桥，存在两个承力索面，即塔顶索面和桥面索面。这两个索面和吊杆组成了索-吊杆超静定体系，其受力分析较为复杂。以某人行桥为工程背景，研究双索面人行悬索桥的内力反演问题，提出了一种根据实测线形反演索力的优化方法，与静载试验结果对比，说明了该方法的适用性。

Abstract:

For the detection of suspension bridge, its state is usually determined by measuring the linear of main cable because of hard to measure the boom force and cable force directly. For the pedestrian suspension bridge with deck cables, there are two bearing cable planes, namely, the pylon top plane and deck plane. The cable-boom statically indeterminate system is composed of the two cable planes and boom. Its stress analysis is more complex. Taking a pedestrian bridge as the engineering background, the internal force inversion problem of double-plane pedestrian suspension bridge is studied. An optimization method of cable force based on the measured linear inversion is proposed. Compared with the static load test results, the applicability of the method is explained.