G325九江大桥换索工程施工监测

斜拉桥是高次超静定结构,在换索施工过程中,主梁任何一个节点坐标的变化都会引起结构内力的重分布,而索力的监测对结构内力及桥梁线形的控制形起关键作用。利用Midas/Civil软件建立G325九江大桥的空间杆系模型,模拟桥梁换索前的状态并计算分析换索过程中索力、位移、应力的变化。在监测过程中,利用频率法测定索力,通过索力控制来调整桥梁的内力状态及线形。最后,换索后索力、位移基本恢复到换索前状态。

Construction Monitoring For Cable Replacement OF Cable-Stayed Bridge

The cable-stayed bridge is an indeterminate structure with high degrees,in the construction process of cable replacement,coordinate changes of any node of the bridge girder would give rise to the re-distribution of internal forces in the structure,while monitoring of cable force plays a critical role in the control of internal forces and alignment for the bridge.In order to simulate the bridge's state before cable replacement and analyze the changes of cable force,displacement and stress during the process ...