DOI: 10.3724/SP.J.1249.2018.01055

Journal of Shenzhen University Science and Engineering (深圳大学学报理工版) 2018/35:1 PP.55-61

Evaluation of the bridge reinforcement effect based on vehicle-bridge coupling vibration

The current evaluation method for the bridge reinforcement effect only includes the dynamic amplification factor of the vehicle load under static condition and ignores vehicle-bridge coupling. Aiming at the shortage, the vehicle bridge coupling vibration analysis module was developed, and the reinforcement effect was analyzed. Firstly, the typical vehicle motion equation and vehicle-multi beam bridge coupling were introduced. The vehicle-bridge coupling vibration system of grillage method was established, and the dynamic visualization was realized. Secondly, a rigid frame arch bridge strengthened by enlarged section was taken as an example. The bridge reinforcement model was established, and the vehicle-bridge coupling was taken into consideration. The reinforcement effect was analyzed in three aspects as the displacement and bending moment of the main ribs, the impact coefficient and the acceleration of the vehicle-bridge system. The results show that the stiffness of the structure is improved and the structure load is also increased after reinforcement; the influence of the increased structural stiffness after reinforcement on the impact factor is not obvious; the standard value of impact factor is applicable for good road condition, while the impact factor fluctuates greatly and thus is not applicable for poor road condition; in the aspect of the acceleration of vehicle-bridge system, the strengthening process increases the rigidity of bridge structure, which makes the vertical acceleration at middle span decrease greatly, but has little effect on the acceleration of vehicle mass center.

Key words:bridge engineering,reinforcement effect evaluation,vehicle-bridge coupling,visualization,acceleration,impact factor

ReleaseDate:2018-03-20 15:26:55

[1] 夏禾,张楠,郭薇薇,等.车桥耦合振动工程[M].北京:科学出版社,2014. XIA He, ZHANG Nan, GUO Weiwei, et al. Coupling vibrations of train-bridge system[M]. Beijing:Science Press, 2014.(in Chinese)

[2] XIA He, DE Roeck G, ZHANG H R, et al. Dynamic analysis of train-bridge system and its application in steel girder reinforcement[J]. Computers & Structures,2001, 79:1851-1860.

[3] 韩艳,夏禾,张楠.列车提速下32 m PC简支T梁的横向刚度加固方案研究[J].铁道学报,2005,27(1):91-95. HAN Yan, XIA He, ZHANG Nan. Study on lateral rigidity reinforcement schemes for 32 m simply-supported PC T-beams under train speed raising[J]. Journal of the China Railway Society,2005,27(1):91-95.(in Chinese)

[4] 俞翰斌,高芒芒,杨宜谦.既有线32 m下承式钢板梁加固方案的车-桥动力仿真分析[J].中国铁道科学,2008, 29(1):26-30. YU Hanbin, GAO Mangmang, YANG Yiqian. Analysis on train-bridge dynamic simulation for reinforcement of the 32 m through steel plate girders on existing line[J]. China Railway Science, 2008, 29(1):26-30.(in Chinese)

[5] 朱婧,李小珍.提速线上承式钢桁梁横向加固技术研究[D].成都:西南交通大学,2004. ZHU Jing, LI Xiaozhen. Study of strengthening lateral stiffness for deck steel truss bridge on speed-raised line[D]. Chengdu:Southwest Jiaotong University, 2004.(in Chinese)

[6] 张文学,陈树礼,苏木标.轻型墩桥梁横向振动检测与加固研究[J].铁道工程学报, 2007, 102(3):37-40. ZHANG Wenxue, CHEN Shuli, SU Mubiao. Test of lateral vibration of light pier bridge and study of reinforcement[J]. Journal of Railway Engineering Society, 2007, 102(3):37-40.(in Chinese)

[7] JTG/T J22-2008公路桥梁加固设计规范[S]. JTG/T J22-2008 Specifications for strengthening design of highway bridges[S].(in Chinese)

[8] JTG D60-2015公路桥涵设计通用规范[S]. JTG D60-2015 General code for design of highway bridge and culverts[S].(in Chinese)

[9] 黄平明,陈万春.桥梁养护与加固[M].北京:人民交通出版社,2009. HUANG Pingming, CHEN Wanchun. Bridge maintenance and rehabilitation[M]. Beijing:China Communications Press, 2009.(in Chinese)

[10] 张树仁.桥梁病害诊断与加固设计[M].北京:人民交通出版社,2013. ZHANG Shuren. Bridge disease diagnosis and reinforce-ment design[M]. Beijing:China Communications Press, 2013.(in Chinese)

[11] 韩万水,李彦伟,马麟,等.重载交通动态过桥可视化仿真与安全评价[M].北京:人民交通出版社,2016. HAN Wanshui, LI Yanwei, MA Lin, et al. Dynamic and visualized simulation of heavy traffic and structure assessment[M]. Beijing:China Communications Press, 2016.(in Chinese)

[12] HAN W S, MA L, CAI C S, et al. Nonlinear dynamic performance of long-span cable-stayed bridge under traffic and wind[J]. Wind and Structures, 2015, 20(2):249-274.

[13] HAN W S, YUAN S J, MA L. Vibration of vehicle-bridge coupling system with measured correlated road surface roughness[J]. Structural Engineering and Mechanics, 2014,51(2):315-331.