Analysis of concrete creep''s influence on dynamic response of train-bridge system with flexible car-body
WANG Kunpeng
XIA He
ZHANG Nan
Abstract：The creep of simply-supported concrete beam on high-speed railway will induce additional deformation of the track structure and affect train operation quality.A train-bridge sys-tem which takes car-body flexibility into consideration is therefore established.Taking the 32 m and 24 m simply-supported prestressed concrete beams,which are the common span beams,on high-speed railway as a study case,the additional deformation of CRTS Ⅲ ballastless slab track induced by concrete creep and its effect on the safety and comfort of vehicles running through the deformed bridge are studied.The calculation results show that prolonging the track construction time can effectively prevent additional deformation of track structure induced by creep from ex-ceeding code limit.The creep deflection makes the convex angles appear around beam end of the track structure,when a wheel goes through the convex angle,the wheel-rail force will decrease sharply,which could even induce wheel-rail separation.The influence of creep on the comfort in-dex is far greater than that on the safety index,and the influence of creep on the vehicle operation comfort could be underestimated when ignoring car-body flexibility.
Keywords：train-bridge systemflexible car-bodysimply supported beamcreep of concretedy-namics
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 114-121 )