基于残余力向量的高桩码头基桩损伤诊断研究  

Damage diagnosis for high-piled wharf piles based on residual force vector

作　　者：张干[1] 孙熙平[1] 王倩[2] 张强[1] 

机构地区：[1]交通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]河北省水利水电勘测设计研究院,天津300250

出　　处：《振动与冲击》2016年第4期188-192,203,共6页Journal of Vibration and Shock

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：对于有上部结构的髙桩码头基桩损伤诊断研究,目前国内外还没有提出一种实用可行的诊断方法。根据振动微分方程,推导出残余力向量的表达式,定义残余力向量绝对值作为损伤诊断指标。以一高桩码头排架为研究对象,在多种工况下,基于残余力向量法,模拟诊断排架基桩的损伤。数值模拟结果表明:以残余力向量绝对值作为诊断指标,对损伤较为敏感,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,为髙桩码头基桩损伤诊断提供了一种新的思路。For high-piled wharf piles with a superstructure,these is not a practical and feasible method at home and abroad for their damage diagnosis. Here,according to their vibration differential equation,the residual force vector expression was deduced. The absolute value of the residual force vector was defined as a damage diagnosis index. By establishing a high-pile wharf frame finite element model and using the residual force vector method,the damage diagnosis numerical simulation for the pile of the high-pile wharf frame was conducted under a variety of conditions. Numerical simulation results showed that the index is sensitive to damage,with lower order modes,the structural damage can be identified rapidly and accurately. The proposed method provided a new idea for diagnosis of high-piled wharf piles damage.

关 键 词：高桩码头基桩 环境激励 有限元模型 残余力向量 损伤诊断 

分 类 号：U656.113[交通运输工程—港口、海岸及近海工程]