简支梁桥损伤程度识别的模拟和试验  

Experimental and Numerical Studies on Damage Severity Identification of Simply Supported Beam Bridges

作　　者：安永辉[1] 欧进萍[1] 

机构地区：[1]大连理工大学土木工程学院,大连116023

出　　处：《振动．测试与诊断》2013年第1期60-65,165,共6页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金重点资助项目(90815022);铁道部科技研究开发计划资助项目(2008G015-C)

摘　　要：在结合钢桁桥损伤程度识别方法的基础上,提出了适用于简支梁结构的两种损伤程度识别方法:整体振型的相关系数法和保证准则法,将其应用到实验室简支梁结构上分别进行数值模拟和试验。脉冲激励下的结果表明,两种方法能较准确地识别损伤单元的等效损伤程度,具有很强的抗噪能力。最后,探讨了激励对提出方法的影响,为工程应用奠定了基础。On the basis of the previous damage severity identification method of steel truss bridges,two damage severity identification methods of simply supported beam bridges are presented: correlation coefficient method and modal assurance criterion method of global mode shapes.Based on a simply supported beam model in the laboratory,both experimental and numerical simulation results under pulse excitation indicate that the proposed methods can identify the damage severity of damaged elements accurately and they have strong anti-noise-interference ability.Moreover,the effect of different excitation on results is examined in the methods;all of these lay a good foundation for engineering.

关 键 词：简支梁桥 损伤程度识别 损伤识别 相关系数 保证准则 

分 类 号：U448.217[建筑科学—桥梁与隧道工程] U441.4[交通运输工程—道路与铁道工程]