大跨度钢结构预应力拉索动态监测方法及应用

DYNAMIC MONITORING METHOD AND APPI ICATION OF PRESTRESSED CABLES IN LARGE SPAN STEEL STRUCTURES

以河湖治理研究基地项目太湖试验厅工程大跨度空间预应力拉索钢结构为例,采用磁通量索力测试方法对结构索体索力进行了测量及动态监测,指导现场预应力张拉施工,并与预应力拉索有限元模拟索力进行对比分析,复核有限元模拟和实测索力偏差是否在可控范围内,对索力进行安全复核和预应力损失复核。该方法可适用于各种大跨度结构的索力监测。

Taking the large-span spatial prestressed cable steel structure of the the Taihu Lake Lake Test Hall project of the research base for river and lake governance as an example,the magnetic flux cable force test method is used to measure and dynamically monitor the cable force of the structure cable body,guide the on-site prestressed tensioning construction,and compare and analyze the cable force with the finite element simulation cable force of the prestressed cable,review whether the deviation of the finite element simulation and measured cable force is within the controllable range,and conduct safety review and prestress loss review of the cable force.This method can be applied to cable force monitoring of various large-span structures.