基于残余力向量法的基桩损伤诊断  

Damage diagnosis for pile based on residual force vector

作　　者：张干[1] 熊洪峰 张宝华[1] 崔衍强[1] 

机构地区：[1]交通运输部天津水运工程科学研究所水工构造物检测诊断与加固技术交通行业重点实验室,天津300456 [2]中国港湾工程有限责任公司,北京100027

出　　处：《水运工程》2015年第6期61-64,共4页Port & Waterway Engineering

基　　金：国家自然科学基金项目(51409134);交通运输部建设科技项目(201332849A090;2014328224040)

摘　　要：根据振动微分方程详细推导了残余力向量的表达式,定义残余力向量的绝对值为结构的损伤指标。通过建立髙桩码头基桩有限元模型,运用残余力向量法对基桩进行损伤诊断数值模拟。数值模拟结果表明:残余力向量作为诊断指标,对结构的损伤较为敏感;只需结构的低阶模态,就可以准确快速地识别出结构的损伤。According to the vibration differential equation, the residual force vector expression was deduced in detail. As a structural damage index, the absolute value of the residual force vector was defined. By establishing high-piled wharf pile finite element model and using the residual force vector method, we carry out the numerical simulation for the pile of high-piled wharf damage diagnosis under a variety of conditions. The simulation results show that taking the residual force vector as diagnostic indicators are more sensitive to damage. The damage of structural can be identified quickly and accurately using low order modes parameters.

关 键 词：残余力向量 基桩 模态参数 损伤诊断 

分 类 号：U656.1[交通运输工程—港口、海岸及近海工程]