| 简支梁在行驶车辆下的动态响应 |
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| 引用本文： | 陈榕峰,章权,张建莉.简支梁在行驶车辆下的动态响应[J].重庆交通大学学报(自然科学版),2008,27(6):1014-1016,1150. |
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| 作者姓名： | 陈榕峰 章权 张建莉 |
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| 作者单位： | 广东省交通咨询服务中心,广东,广州,510101;长安大学,陕西,西安,710064;广东省交通咨询服务中心,广东,广州,510101;华南农业大学,广东,广州,510642 |
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| 基金项目： | 交通部交通应用基础研究基金
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| 摘 要： | 把桥梁和车辆看作两个分离体系,提出了四自由度1/2车辆模型;应用广义虚功原理建立振动方程,并引用国标(GB/T 7031—1986)建议的公路路面功率谱密度的拟合表达式,求得了不同等级桥面的不平整度值;通过数值仿真得到不平整桥面简支桥梁在运行车辆作用下的时域响应,获得了相应冲击系数随桥面等级及车速变化规律。结果表明,桥梁冲击系数随着车速增加呈增大趋势;随着公路桥面等级变差呈非线性增大,桥面等级是影响车辆动力作用的最显著因素。
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| 关 键 词： | 桥面不平度 车-桥耦合 冲击系数 动力响应 |
Dynamic Response of Simply-Supported Bridge under Moving Vehicular Loads |
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| CHEN Rong-feng,ZHANG Quan,ZHANG Jian-li.Dynamic Response of Simply-Supported Bridge under Moving Vehicular Loads[J].Journal of Chongqing Jiaotong University,2008,27(6):1014-1016,1150. |
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| Authors: | CHEN Rong-feng ZHANG Quan ZHANG Jian-li |
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| Institution: | CHEN Rong-feng1,2,ZHANG Quan1,ZHANG Jian-li3(1.Consultation & Service Center of Communication of Guangdong Province,Guangdong Guangzhou 510101,China,2.Chang\'an University,Shanxi Xi\'an 710064,3.South China Agriculture University,Guangdong Guangzhou 510642,China) |
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| Abstract: | Bridge and vehicle are treated as two separate systems.1/2 four free degree vehicle model is proposed;their dynamic equations are established with the adoption of virtual work theory.According to the power spectral density function advised by GB/T 7031—1986,different values of different bridge deck roughness are obtained.The time-domain response of the simply-supported beam in different bridge deck roughness caused by moving vehicle is obtained by numerical simulation,and the variety rule of impacting factor is also obtained.The result shows that the value of impacting factor increases along with vehicle velocity but not linearly along with the grade of highway bridge deck roughness.The grade of bridge deck roughness is the most remarkable factor influencing vehicle dynamic effect. |
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| Keywords: | bridge deck roughness vehicle-bridge couple vibrations impacting factor dynamic response |
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