大跨度异型钢管混凝土拱桥典型病害分析及支座脱空影响研究

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (18) : 161-168.

论文

侯剑岭1，许维炳1，陈彦江1，张开达1，孙航2

作者信息 +

Typical diseases of long-span concrete filled steel tube arch bridges and the effects of the void of supports

HOU Jianling1,XU Weibing1,CHEN Yanjiang1,ZHANG Kaida1,SUN Hang2

Author information +

文章历史 +

摘要

大跨度异型钢管混凝土拱桥在使用过程中易出现车致动力响应大等不利情况，现阶段造成该类型桥梁车致动力响应显著的病害及其影响尚不明晰。以某典型大跨度异型钢管混凝土拱桥为研究对象，对该桥的典型病害进行了调查，基于现场测试与理论分析，对该桥的典型病害及支座脱空病害的影响进行了研究。现场调查及测试结果表明：支座脱空会引起主梁伸缩缝两侧的差异沉降，导致桥梁受力状态变化，加剧车辆对主梁和吊杆的冲击作用。现阶段钢箱梁伸缩缝附近和跨中位移冲击系数分别达到了1.52和1.15，吊杆力应力幅变化率在-28.0%~18.5%之间。数值分析结果表明：支座脱空后钢箱梁和吊杆的车致动力响应变化显著。支座脱空将导致该桥主梁明显的顺桥向位移，且与主梁竖向位移达到了相同量级；支座脱空后钢箱梁车致加速度峰值会显著增加，且当车辆荷载作用下支座与钢箱梁仍能发生相互碰撞时影响更为显著；支座脱空后吊杆力应力幅变化显著，且其对短吊杆影响更显著。支座脱空是造成该类型桥梁钢箱梁、吊杆等构件车致冲击响应显著变化的重要原因之一。

Abstract

Long-span CFST arch bridges often suffered from serious vehicle-induced dynamic responses during service, but the reasons and effects of the increased vehicle-induced dynamic response were unclear. Taking a typical long-span CFST arch bridge as research object, typical diseases were investigated. Based on field testing and theoretical analysis, the typical diseases and the effects of the viod of supports were studied. Field investigation and test results show: the void of main girder supports caused differential settlement on both sides of expansion joint, and aggravated the vehicle impact of main girder and suspenders. Impact factor of displacement near expansion joint and midspan reached 1.52 and 1.15, respectively. The variation rate of stress amplitude of suspender force is between -28.0% and 18.5%. The numerical results show: vehicle-induced dynamic response of steel box girder and suspenders change significantly after supports were void. The void of the supports cause obvious along-bridge displacement of the main girder, which reaches the same magnitude as the vertical displacement. The peak value of vehicle-induced acceleration of steel box girder increase significantly after supports were void, and the impact will be more significant when the support and steel box girder still collide with each other under vehicle load. Stress amplitude of suspender force changes remarkably after the support was void, and its effect on short suspender is more remarkable. The void of support is one of the main reasons for the significant change of vehicle-induced impact response of steel box girder, suspender and other components of this type of bridge.

导出引用

侯剑岭1，许维炳1，陈彦江1，张开达1，孙航2. 大跨度异型钢管混凝土拱桥典型病害分析及支座脱空影响研究[J]. 振动与冲击, 2020, 39(18): 161-168

HOU Jianling1,XU Weibing1,CHEN Yanjiang1,ZHANG Kaida1,SUN Hang2. Typical diseases of long-span concrete filled steel tube arch bridges and the effects of the void of supports[J]. Journal of Vibration and Shock, 2020, 39(18): 161-168

参考文献

[1] 周水兴，李威. 钢管混凝土拱桥常见病害成因分析[J]. 重庆交通大学学报(自然科学版). 2013, 32(S1): 738-741.
Zhou Shuixing, Li Wei. Causes of common diseases of CFST arch bridge[J]. Journal of Chongqing Jiaotong University(Natural Science). 2013, 32(Sup1): 738-741.
[2] Roeder C W, Macrae G, Crocker P, et al. dynamic response and fatigue of steel tied arch bridge[J]. Journal of Aerospace Engineering. 2000, 5(1): 14-21.
[3] Dongzhou H. Dynamic and impact behavior of half-hrough arch bridges[J]. Journal of Bridge engineering. 2005, 10(2): 133-141.
[4] 孙潮，吴庆雄，陈宝春. 钢管混凝土拱桥车振性能分析[J]. 公路交通科技. 2007, 24(12): 54-59.
Sun Chao, Wu Qing-xiong, Chen Bao-chun. Analysis on dynamic behavior of concrete filled steel tubular arch bridge under vehicle moving loads[J]. Journal of Highway and Transportation Research and Development. 2007, 24(12): 54-59.
[5] 杨建荣，李建中，申俊昕. 钢管混凝土系杆拱桥车桥耦合振动分析[J]. 北京工业大学学报. 2012, 38(06): 847-853.
Yang Jian-rong, Li Jian-zhong, Shen Jun-xin. Numerical investigation of concrete-filled steel tubular tied-arch bridge under travelling vehicles[J]. Journal of Beijing University of Technology. 2012, 38(6) :847-853.
[6] Li Y, Qin L, Li Z, et al. Dynamic performance of strengthened concrete-filled steel tubular arch bridge due to moving vehicles[J]. Journal of Aerospace Engineering. 2019, 32(1): 4018113.
[7] 甘泉，王荣辉，饶瑞. 基于振动理论的索力求解的一个实用计算公式[J]. 力学学报. 2010, 42(5): 983-988.
Gan Quan, Wang Rong-hui, Rao Rui. Practical formula for estimation on the tensional force of cable by its measured natural frequencies[J]. Chinese Journal of Theoretical and Applied Mechanics. 2010, 42(5): 983-987.
[8] 何伟，陈淮，王博，等. 复杂边界条件下基于频率法的吊杆张力测定研究[J]. 土木工程学报. 2012, 45(03): 93-98.
He Wei, Chen Huai, Wang Bo, Study of suspender tension measurement based on frequency method with complex boundary conditions[J]. China Civil Engineering Journal. 2012, 45(3): 93-98.
[9] Wang Q, Okumatsu T, Nakamura S. Fatigue failure analysis of cracks near the sole plate of a half-through steel-arch bridge[J]. J Bridge Eng. 2019, 5(24), 5019004.
[10] 王宗林，王潮海. 大跨径钢管混凝土拱桥的动力性能改造[J]. 公路交通科技. 2006(11): 73-77+94.
Wang Zong-lin, Wang Chao-hai, Dynamic performance improvement for long span steel tube confined concrete arch bridge[J]. Journal of Highway and Transportation Research and Development. 2006(11): 73-77. in Chinese.
[11] JTG/T J21-01-2015. 公路桥梁荷载试验规程[S]. 2016.
JTG/T J21-01-2015. Load Test Methods for Highway Bridge[S]. 2016.
[12] 彭港. 改进HHT方法及其在拉索振动信号处理中的应用[D]. 广州大学, 2014.
Peng Gang. Improve the HHT method and its application in vibration signal processing of cable[D]. Guangzhou: Guangzhou university, 2014.
[13] 杨建喜，陈惟珍，古锐. 拱桥短吊杆动力特性分析[J]. 桥梁建设. 2014, 44(03): 13-18.
Yang Jian-xi, Chen Wei-zhen, Gu Rui. Analysis of dynamic characteristics of short hangers of arch bridge[J]. Bridge Construction. 2014, 44(3): 13-18. in Chinese.
[14] 李勇. 钢管混凝土拱桥抗震性能研究[D]. 哈尔滨工业大学, 2008.
Li Yong. Seismic behavioral study on conceret-filled steel tubular arch bridges[D]. Harbin: Harbin Institute of Technology, 2008.