高桩码头结构安全评价指标及其敏感性分析

针对高桩码头结构损伤引起的安全性评价问题,提出将宏观层面的横向位移、桩顶转角和微观层面的桩身应变作为高桩码头结构的安全性评价指标。基于工程实际建立了高桩码头结构的有限元分析模型,并与现场实测动力特性数据进行了对比验证;结合有限元模型和概率方法研究了高桩码头结构安全性能性能评估指标及其敏感性规律;得出宏观安全指标与桩的结构参数、强度参数以及土体参数有较大的相关性,微观安全指标只对桩的有效截面积及局部强度敏感。研究成果可为高桩码头结构损伤预警和状态评估提供依据。

Safety assessment indictors and sensitivity analysis of high-piled wharf structure

Aiming at the problem of safety evaluation caused by structural damage of high-piled wharf,the safety evaluation indicators of the high-pile wharf structure are divided into the horizontal displacement of the macroscopic level,the top angle of the pile top and the pile strain based on the microscopic level.Based on the engineering practice,the finite element analysis model of the high-pile wharf structure is established and compared with the measured dynamic characteristics data.Combined with the finite element model and probability method,the safety evaluation indicators and their sensitivity laws of high-piled wharf structure are studied.It is concluded that the macroscopic safety index is highly correlated with the structural parameters,strength parameters and soil parameters of the pile,while the microscopic safety index is only sensitive to the effective cross-section area and local strength of the pile.The research results can provide a basis for structural damage warning and state assessment of high-pile wharf.