项目名称: 基于结构随机动力响应互相关函数特性分析的运营实桥结构安全性监测方法研究
项目编号: No.51508486
项目类型: 青年科学基金项目
立项/批准年度: 2016
项目学科: 建筑科学
项目作者: 雷家艳
作者单位: 厦门大学
项目金额: 20万元
中文摘要: 本项目的研究针对运营实桥结构安全监测的工程实际需要立题,以有限带宽白噪声激励下结构随机动力响应间的互相关函数解析式推导为出发点,针对运营车辆及其他环境荷载激励的频带特性,修正动力响应互相关函数与结构质量、模态参数及外激励频谱之间的解析表达式,探求桥梁运营状态下结构相邻测点间动力响应互相关函数的真实特性,并从互相关函数提取桥梁结构安全性的表征参数,建立支持向量机二分类算法,实现桥梁运营状态下的结构安全性监测。
中文关键词: 桥梁监测;损伤识别;互相关函数;随机振动;动力测试
英文摘要: The whole research process aims to build a practical technique which is applied to achieve the safety monitoring of operating bridges. Abased on the derivation process of cross correlation function between two structural vibration responses with bandlimited white noise excitation, function formulas are revised according to different frequency spectrum of excitation force from passing vehicles. Subsequent work is carried on the real characters analysis of cross correlation functions, from which the key parameter indicating the structural safety of operating bridges is extracted. And safety monitoring problems can be solved by binary classification computing method of SVM.
英文关键词: bridge monitoring;damage detection;cross-correlation function;stochastic vibration;dynamic test