运用中、下承式拱桥吊杆张力变化进行吊杆损伤识别研究

英文篇名：Damage identification of suspenders based on change of suspender tensions of through and half-through arch bridges
中文刊名：振动与冲击
英文刊名：Journal of Vibration and Shock
作者：何伟 ; 何容 ; 陈淮
英文作者：HE Wei1 ; HE Rong1 ; CHEN Huai2 (1.School of Civil Engineering and Communication ; North China Institute of Water Conservancy and Hydroelectric Power ; Zhengzhou 450011 ; China ; 2.School of Civil Engineering ; Zhengzhou University ; Zhengzhou 450001 ; China)
中文关键词：中、下承式拱桥 ; 吊杆 ; 损伤识别 ; 张力 ; 频率
英文关键词：half-through and through arch bridge ; suspender ; damage identification ; tension ; frequency
出版日期：2012-03-15
机构：华北水利水电学院土木与交通学院;郑州大学土木学院;
年：2012
期：05
出版单位：振动与冲击

摘要

考虑吊杆两端弹性支承及拱肋、系杆梁里设置的减振垫减振作用和拱肋、系杆梁附加质量等的影响,建立了复杂边界条件下吊杆张力与其横向振动频率之间解析表达式,以提高吊杆张力测试计算精度。基于摄动有限元理论研究了吊杆损伤时对吊杆系张力的影响,并提出了根据吊杆系张力变化进行吊杆损伤识别计算方法,以京港澳高速郑州黄河大桥为实例对计算公式进行验证。计算结果表明:该方法比较全面地考虑了吊杆实际边界条件,提高了短吊杆和长吊杆张力测试精度;采用本方法进行计算吊杆损伤识别,结果准确。
Considering influences of elastic supports at both ends of a suspender,damping effect of shock pads in tied beams and arch ribs,and additional masses of tied beams and arch ribs,an analytical expression between the suspender tension and lateral vibration frequency was established under complex boundary conditions to improve the accuracy of suspender tension test.Based on perturbation finite element method,the effets of suspender damages on the suspender tensions were studied.A new method was proposed to identify suspender damage according to the change of suspender tensions,it was validated with an example of Zhenzhou Yellow River Bridge on Beijing-Hong Kong-Macao expressway.The calculation results showed the test precision of suspender tension test is improved after considering the actual boundary conditions of suspenders,and according to the change of suspender tensions the damage identification results are correct.

引文

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