摘要
针对实际工程中大量钢筋混凝土简支T型梁桥的损伤、老化问题,对这类桥型进行损伤识别理论的研究。在建立典型T型梁桥有限元模型的基础上,采用便于T型梁桥工程应用的柔度差指纹和损伤确定准则组合成新的识别流程,成功地对钢筋混凝土简支T型梁桥主梁的损伤识别进行了数值模拟。考虑现有检测技术的限制(有限测点及测试噪声的干扰),利用MONTECARLO方法量化了噪声干扰对识别结果的影响。模拟分析的结果揭示了对该桥型进行损伤识别的特点并为其实际的损伤辨识提出了建议。
Based on damage and ageing problems of simple-supported reinforced concrete T-beam(SSRCTB)which is widely constructed in practice,practical value and guidance are provided by theoretical research of damage detection for SSRCTB. In this paper, a numerical simulation procedure for damage detection of SSRCTB based on finite element model is presented. A new detection procedure which consists of flexibility difference method and damage indication criterion is adopted for the purpose of practice. Considered limitation of current test technologies on few test points and test noise disturbance,MONTE CARLO method is used to qualify and quantify the influence of these adverse factors in detail. Features of damage detection of SSRCTB are revealed in the results,at the same time,some suggestions are also presented.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2004年第4期45-49,共5页
China Journal of Highway and Transport
基金
广东省自然科学基金项目(000387)
关键词
桥梁工程
损伤识别
数值模拟
损伤指纹
T型梁桥
噪声干扰
bridge engineering
damage detection
numerical simulation
damage fingerprint
T-beam bridge
noise disturbance
