基于动力响应的高速铁路桥墩损伤评估方法研究

项目名称： 基于动力响应的高速铁路桥墩损伤评估方法研究

项目编号： No.51208028

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 建筑环境与结构工程学科

项目作者： 战家旺

作者单位： 北京交通大学

项目金额： 25万元

中文摘要： 在既有判断桥墩是否存在损伤的研究基础上，研究架梁前悬臂桥墩和在役高速铁路桥墩损伤定位和定量评估方法这一桥梁工程领域的前沿课题。避开不确定性的通行车辆横向激励，以冲击荷载和正弦荷载等确定性荷载激励桥墩，分析了架梁前桥墩纵横向动力响应及在役桥墩横桥向动力响应对墩身结构性损伤、构件连接弱化、基础弱化和支座劣化等几种形式病害的灵敏度，结合高速铁路桥墩的结构特点确定测点和激励点的最优布置，研究基于灵敏度分析的桥墩结构病害诊断理论。最终目标是通过理论分析、实验室试验和现场试验建立一种高速铁路桥墩损伤评估方法。项目具有国际合作的背景，有利用国内外大量桥梁试验、检测资料及在铁道部项目支持下进行桥梁现场动力试验的便利条件。项目的完成将对完善桥梁损伤识别的基础理论做出贡献，并为进一步的理论研究和工程应用奠定基础。

中文关键词： 高速铁路；桥墩；健康状态；动力评估；

英文摘要： On the basis of existing researches that determine whether piers are damaged, the damage location and quantitation method for the piers before beam erection and high-speed railway piers in service is studied, which is an advanced project in the bridge engineering society. Not the complex lateral loads of passing trains, but the deterministic forces, such as, impact loads and sinusoidal loads, are used to excite the piers. The sensitivities of lateral and longitudinal dynamic responses of new piers before beam erection and lateral responses of existing piers to disasters, such as structural damage, member connection deterioration, subsoil deterioration and bearing degradation are analyzed. Basing on the structural characteristics of high-speed railway piers, the optimum arrangements of measurement points and excitation location are determined. The sensitivity-based disaster diagnosis theory for piers is studied. The ultimate aim of this project is to propose a useful method of damage evaluation method for railway piers by theoretical analysis, laboratory experiments and in-situ experiments. The project is cooperated with foreign experts and many useful data about bridge experiments and bridge inspection can be used. In-situ dynamic experiments can be done under the support of other railway projects. The research

英文关键词： High-speed railway；pier；health condition；dynamic evaluation；