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为了研究桥梁在移动车辆荷载作用下的动力特性和冲击系数,以某连续刚构桥为计算实例,采用有限元软件Midas/Civil建立桥梁结构的有限元模型,将车辆荷载近似模拟为三角形荷载,用时程分析法分析了车辆荷载作用下连续刚构桥的动力响应特征,分析了车辆在不同车速、不同车重作用下车辆荷载因素对连续刚构冲击系数的影响规律,并提出相应的结论,为桥梁结构在移动车辆荷载作用下的安全性、适用性提供参考依据。
In order to study the dynamic characteristics and impact coefficient of the bridge under moving vehicle loads, a finite element software named Midas / Civil was used to build a finite element model of the bridge structure with a continuous rigid frame bridge as an example to simulate the vehicle load as a triangular load. The dynamic response characteristics of continuous rigid frame bridge under vehicle load are analyzed by time-history analysis. The influence of vehicle load factors on impact modulus of continuous rigid frame under different vehicle speeds and different vehicle loads is analyzed. Corresponding conclusions are drawn, It provides a reference for the safety and applicability of bridge structure under the action of moving vehicle load.