摘要
为研究高速铁路双层钢板-混凝土结合梁桥的动力响应特征,基于有限元方法和多体动力学方法,建立高速列车-桥梁动力分析模型,以7×40 m双层钢板-混凝土结合梁桥为研究对象,开展车桥系统动力性能分析,并对比正弯矩区下层混凝土板的板厚对动力响应的影响。研究结果表明:双层结合作用对桥梁和车辆动力响应均有积极作用;正弯矩区下层设置混凝土板后,桥梁整体刚度有明显提升;双层结合作用可使车辆竖向加速度显著减小,使轮轴横向力和脱轨系数有一定程度降低;随着下层混凝土板厚的增加,桥梁竖向刚度可进一步提高,但对桥梁横向刚度和车辆动力响应影响不大。研究结果可为双层钢板-混凝土结合梁桥的设计提供参考。
In order to investigate the dynamic characteristics of a double-deck steel-plate concrete composite beam bridge for high-speed railway,a high-speed train-bridge dynamic analysis model was established,based on the finite element method and multibody dynamics method.The 7×40 m double-deck steel-plate concrete composite beam bridge was taken as the research object,and the dynamic analysis of the vehicle-bridge system was conducted.Then,the effects of the thickness for the lower concrete slab in the positive moment area on the dynamic responses were compared.The results show that the double-deck composite action has a positive effect on the dynamic responses of both bridge and vehicle.The overall stiffness of the bridge is significantly improved for the lower concrete slab set in the positive moment area.Meanwhile,the vehicle’s vertical acceleration can be reduced significantly,due to the double-deck composite action.The lateral force and derailment coefficient would also decline to a certain extent.The vertical bridge stiffness would be improved further due to theincreasing thickness of the lower concrete slab.However,the slab thickness has little influences on the bridge lateral stiffness and the vehicle dynamic responses.The research findings can provide references for the design of double-deck steel-plate concrete composite beam bridge.
作者
户东阳
HU Dongyang(Kunming Survey,Design and Research Institute Co.,Ltd.of CREEC,Kunming 650200,China)
出处
《铁道科学与工程学报》
EI
CAS
CSCD
北大核心
2022年第6期1485-1491,共7页
Journal of Railway Science and Engineering
基金
四川省重点研发计划项目(2019YFG0048)
中国中铁二院科研项目(KYY2018059(18-20))。
关键词
结合梁桥
双层结合作用
高速铁路桥梁
车桥系统
动力响应
composite beam bridge
double-deck composite action
high-speed railway bridge
vehicle-bridge system
dynamic response
