北京交通大学学报2017，Vol.41Issue(6)：114-121,8.DOI:10.11860/j.issn.1673-0291.2017.06.018
混凝土徐变对柔性车体列车-桥梁系统动力响应影响分析
Analysis of concrete creep''s influence on dynamic response of train-bridge system with flexible car-body
摘要
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.关键词
车桥系统/柔性车体/简支梁/混凝土徐变/动力学Key words
train-bridge system/flexible car-body/simply supported beam/creep of concrete/dy-namics分类
交通工程引用本文复制引用
王昆鹏,夏禾,张楠..混凝土徐变对柔性车体列车-桥梁系统动力响应影响分析[J].北京交通大学学报,2017,41(6):114-121,8.基金项目
中国交通建设股份有限公司特大科技研发项目(2014-ZJKJ-03) （2014-ZJKJ-03）
中国铁路总公司科技研究开发计划重点课题(C14D00151) Foundation items:Mega Technology R&D Project of China Communications Construction Co., Ltd.(2014-ZJKJ-03 ) （C14D00151）
Science and Technology Research and Develepment Key Program of China Railway Corporation(C14D00151) （C14D00151）
