188宝金博页面版

www.springer.com/journal/13296International Journal of Steel Structures 15(4): 809-826 (2015)DOI 10.1007/s13296-015-1204-8ISSN 1598-2351 (Print)ISSN 2093-6311 (Online)Influential Parameter Analysis on Vibration Responses ofRigid-frame Viaducts Induced by Running High-speed TrainsLiangming Sun 1, *, Toshiro Hayashikawa 2 , Xingwen He 3 , and Weiping Xie 41 PhD, School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, 430070, China2 Professor, Faculty of Engineering, Hokkaido University, Sapporo, 060-8628, Japan3 Assistant Professor, Faculty of Engineering, Hokkaido University, Sapporo, 060-8628, Japan4 Professor, School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, 430070, ChinaAbstractThis study is intended to clarify the parametric influence for the vibration responses of rigid-frame viaducts in both verticaland lateral directions caused by running high-speed trains. A developed 3D numerical analysis approach considering train-bridge interaction is applied to investigate the vibration characteristics of rigid-frame viaducts. The analytical model iscomposed of the high-speed train model with multi-DOFs vibration system for each car and the rigid-frame viaduct model withthree bridge blocks. They are linked by an assumed wheel-rail relation through the rail model considering the simulated trackirregularities. By using the analytical model, the parametric study is carried out. The impact factors including train speed, traintype, track irregularity, rail type and damping are investigated and identified as significant variables. The analytical results aresignificant and give some instructive information regarding the impact factors of the train-bridge system which could be muchhelpful for the mitigation of vibration and the maintenance in the high-speed railway.Keywords: Vibration response, rigid-frame viaduct, high-speed train, train-bridge interaction, impact factor1. IntroductionWith the rapid economic and urban development, thehigh-speed railway connecting major cities serves as avital role in the national transportation network. It becomesa new trend of railway development in the world due toits high speed, comfort, punctuality, safety, less land useand so on. Among the high-speed railways, the bridgestake a great percentage. We are deriving the benefits ofhigh-speed railways in developed regions in the world.However, the problems of bridge vibration induced byrunning high-speed trains (HSTs) have become moreprominent in recent years (Matsuura, 1976; Frýba, 1996;Yang et al., 2004). Through the continuous increase oftrain speeds, the extensive application of high performancematerials, the ever-increasing span length of bridges, andthe improvement of vibration environment along thehigh-speed railway, all attribute to the related problemscaused by bridge vibration. The bridge vibration mayincrease the internal force of structures, produce vibrationdeformation, cause local fatigue damage of structuralmembers and even completely destroy the bridges (Unoet al., 2007; Miyashita et al., 2007; Xia et al., 2012; Zhouet al., 2013; Liu et al., 2013). They can propagate to theambient ground via the footing and pile structures,thereby generating long-term ground vibration, bringingannoyances to the residents alongside and malfunctioningto the vibration-sensitive equipment when the HSTs passthrough developed areas or high-tech industrial areas(Yokoshima and Tamura, 1999; Ju et al., 2007; Xia et al.,2009). Therefore, the HST-induced vibration has becomea more serious concern to people along with the furtherdevelopment of the high-speed railway.Regarding HST-induced bridge vibration, the dynamicbehavior of railway bridges has been a key researchsubject of bridge design and maintenance since TokaidoShinkansen was the first high-speed railway to beginoperation from 1964 in the world. Basic theories for thedynamics of railway bridges caused by running HSTswere widely investigated by a number of researchers(Matsuura, 1976; Frýba, 1996; Yang et al., 2004; Garineiand Risitano, 2008; Xia et al., 2012; Olmos and Astiz,2013). Analytical models of the coupled TBI systemtogether with experimental validations and engineeringapplications in the high-speed railways have been studiedReceived December 13, 2014; accepted May 28, 2015;published online December 31, 2015© KSSC and Springer 2015*Corresponding authorTel: +86-13545909941, Fax: +86-27-87664561E-mail: sunliangming@gmail.com