湖南大学学报（自然科学版）Issue(9)：52-58,7.
汽车制动作用下预应力混凝土简支梁桥的动力响应及冲击系数研究∗
Study of the Dynamic Responses and Impact Factors of Simply-supported Prestressed Concrete Girder Bridges Due to Vehicle Braking
摘要
Abstract
In this study,a three-dimensional vehicle-bridge coupled model was developed to study the dynamic impact of vehicle braking on bridges.The dynamic responses and impact factors of simply-supported prestressed con-crete girder bridges were obtained under the braking of a typical three-axle vehicle model.A parametric study was per-formed to investigate the effect of several important parameters,including the vehicle braking position,deceleration rate,initial vehicle speed,road surface condition and bridge span length,on the impact factors.In addition,a compar-ison was conducted between the calculated dynamic impact factors and those specified in the current Chinese bridge de-sign code.The results show that the impact of vehicle braking on bridges increases with the increase of braking force, and braking within the first half span causes greater impact than braking within the second half span.Furthermore, the dynamic responses and impact factors of bridges due to vehicle braking are notably greater than those due to the vehicles moving at constant speeds,and the impact factors may exceed those specified in the current Chinese bridge de-sign code.关键词
汽车制动/三维车桥模型/动力响应/冲击系数/简支梁桥Key words
vehicle braking/three-dimensional bridge-vehicle model/dynamic response/impact factor/simply-supported bridge分类
交通工程引用本文复制引用
邓露,王芳..汽车制动作用下预应力混凝土简支梁桥的动力响应及冲击系数研究∗[J].湖南大学学报（自然科学版）,2015,(9):52-58,7.基金项目
国家自然科学基金资助项目(51208189),National Natural Science Foundation of China(51208189) （51208189）
湖南省杰出青年基金资助项目(14JJ1014) （14JJ1014）
