海港大管桩力学性能实验测试与反演研究

EXPERIMENT AND INVERSE ANALYSIS FOR MECHANICAL PROPERTIES OF LARGE DIAMETER PRESTRESSED CONCRETE TUBULAR PILE AT SEAPORT

利用光纤光栅传感技术,在现场对大管桩在外载作用下的变形情况进行了测试．根据实验测试结果,利用数值法反分析大管桩力学性能参数,同时得到大管桩接缝处的环氧树脂材料对大管桩整体力学性能影响很小．反演出的合理的力学性能参数为大管桩的正确受力分析以及健康诊断提供了依据．

The deformation of the large diameter prestressed concrete tubular pile subjected to external forces is tested on the spot by applying fiber grating sensing technology. Based on test results, the related mechanical parameters of the large diameter prestressed concrete tubular pile were obtained by an inverse analysis. At the same time, the epoxide resin at the joint gap has little effect on the mechanical properties of the large diameter prestressed concrete tubular pile. The reasonable mechanical parameters obtained by the inverse analysis provide useful data for stress analysis and health monitoring of the large diameter prestressed concrete tubular pile under various engineering conditions.