运用中、下承式拱桥吊杆张力变化进行吊杆损伤识别研究

何伟;何容;陈淮

振动与冲击 ›› 2012, Vol. 31 ›› Issue (5) : 153-157.

PDF(1152 KB)
PDF(1152 KB)
振动与冲击 ›› 2012, Vol. 31 ›› Issue (5) : 153-157.
论文

运用中、下承式拱桥吊杆张力变化进行吊杆损伤识别研究


  • 何伟1; 何容1 ; 陈淮2
作者信息 +

Research on Damage Identification for Suspenders Based on the Change of Suspenders Forces of Through and Half-Through Arch Bridges

  • HE Wei1; HE Rong1; CHEN Huai2
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文章历史 +

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,以京港澳高速刘江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。

Abstract

Considered the influence of elastic supports at both ends of suspender, damping effect of shock pads in tied beams and arch ribs, furthermore 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 forces of suspenders affected by the damage of suspenders were researched. A new method was proposed to identify suspender damage according to the change of suspenders forces which was proved by examples of Liujiang Bridge on Beijing-Hong Kong-Macao expressway. The calculation results showed the test precision of suspender tension test was improved for having been considered the actual boundary conditions of suspenders, and according to the change of suspenders forces the identification results were accurate.

关键词

/ 下承式拱桥 / 吊杆 / 损伤识别 / 张力 / 频率

Key words

half-through and through arch bridge / suspender / damage identification / force / frequency

引用本文

导出引用
何伟;何容;陈淮. 运用中、下承式拱桥吊杆张力变化进行吊杆损伤识别研究[J]. 振动与冲击, 2012, 31(5): 153-157
HE Wei;HE Rong;CHEN Huai. Research on Damage Identification for Suspenders Based on the Change of Suspenders Forces of Through and Half-Through Arch Bridges[J]. Journal of Vibration and Shock, 2012, 31(5): 153-157

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