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恒载作用下梁和桥梁的损伤识别研究
引用本文:刘纲,黄宗明,杨溥.恒载作用下梁和桥梁的损伤识别研究[J].重庆建筑大学学报,2008,30(5):28-31.
作者姓名:刘纲  黄宗明  杨溥
作者单位:1. 重庆大学,土木工程学院,重庆,400030;重庆大学,光电技术及系统教育部重点实验室,重庆,400030
2. 重庆大学,土木工程学院,重庆,400030
基金项目:国家高技术研究发展计划(863计划),重庆市科技攻关计划
摘    要:提出了桥梁长期健康监测中基于恒载进行梁及桥梁损伤识别的方法。首先从正分析入手计算超静定梁仅在恒载作用下发生损伤的特征表现,通过分析不同监测参量及测点对损伤的敏感度,研究仅在恒载下监测参量选取及测点布置的特点;再从反分析出发通过改进的自适应遗传算法求解有约束的优化问题,研究仅在恒载作用下识别梁损伤的可行性,分析结果表明通过较少测点即可对梁的损伤进行识别,为基于恒载的损伤识别方法在实桥健康监测中的应用提供了理论指导。

关 键 词:损伤识别  恒载  有限测点  桥梁

Damage Detection for Beam and Bridge under Dead Load
LIU Gang,HUANG Zong-ming,YANG Pu.Damage Detection for Beam and Bridge under Dead Load[J].Journal of Chongqing Jianzhu University,2008,30(5):28-31.
Authors:LIU Gang  HUANG Zong-ming  YANG Pu
Affiliation:a. College of Civil Engineering, Chongqing University;b. The Key Laboratory for Optoelectronic Technology & System of Ministry of Education, Chongqing University, Chongqing 400044, P. R. China;College of Civil Engineering, Chongqing University,Chongqing 400044, P. R. China;a. College of Civil Engineering, Chongqing University;b. The Key Laboratory for Optoelectronic Technology & System of Ministry of Education, Chongqing University, Chongqing 400044, P. R. China
Abstract:We address damage detection based on dead loads in monitoring the health of beams and bridges.We discuss the damage characteristics of statically indeterminate beams under dead loads and analyze monitoring parameters and sensor placement in monitoring.We used an amended genetic algorithm to solve the optimization problem under constrained parameters.Damage in a beam was detected successfully based on dead loads with limited sensor allocations.We present a way to detect damage based on dead loads in bridge health monitoring.
Keywords:damage detection  dead load  limited sensor location  bridge
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