摘要
为了解大跨度钢桁梁斜拉桥在不同车速下结构的动力响应规律,建立车辆匀速通过的动力模型,并将车辆模拟为弹簧-质量块,分析不同车速下钢桁梁跨中位置的竖向位移与弦杆应力响应情况。计算结果表明,随着车速的增大,跨中竖向位移的极值均有增大趋势,车辆对结构的冲击效应也越大,弦杆应力响应也越明显。
In order to understand the dynamic response rules of large-span steel trussed cable-stayed bridge under different speeds,the dynamic model for constant speed was established in which the moving vehicle was simulated as spring-mass model,then the dynamic model for constant speed was established,then the dynamic response of vertical displacement and stress of chord in midspan of steel truss girder were analyzed.The results shows that with the increase of the speed,the vibration response becomes more and more significant,the impact effect caused by vehicle is bigger,and the stress amplitude of component in midspan increases.
作者
何博文
周伟
赖敏芝
HE Bowen;ZHOU Wei;LAI Minzhi(CCCC Second Highway Consultant Co., Ltd., Wuhan 430056, China;Hubei Communications investment intelligent Detection Co., Ltd., Wuhan 430050, China)
出处
《交通科技》
2018年第6期17-20,24,共5页
Transportation Science & Technology
关键词
钢桁梁斜拉桥
车辆模型
车速
动力效应
steel trussed cable-stayed bridge
vehicle model
speed
dynamic effect
