限位装置静力设计研究

在地震中,由于桥梁联结间伸缩缝处过大的变位会造成桥梁的破坏,所以需要在支座宽度不足的伸缩缝间设置适当的限位装置,以限制伸缩缝间的相对位移。文章对限位装置的设计思想进行了探讨,通过对桥梁按不同的重要性等级进行分类,引入桥梁地震荷载重要性系数,提出了限位装置的设计地震力和位移的计算方法,并对限位装置的构造以及设计过程进行了介绍。通过对算例结果的反应谱分析,证明了该设计方法能够有效地减小桥梁控制位置的剪力和相对位移,从而达到限位的目的。

Research on Static Design for Restrainers

Since relative large displacement between the bridge's frames can cause damage of bridge,suitable restrainers should be used in the place without adequate seated length to restrict the relative displacement.In the paper,the design idea of restrainer is discussed.Through the classification of the importance for bridges,the importance coefficient of seismic load for bridge is introduced,the design method of the devices is put forward,and the construction and design process of the devices are introduced.According to the result of response spectrum analysis,the shear force and the relative displacement of the controlled parts for bridge are efficiently reduced,so the aim to restraining the relative displacement between the girder and the pier of bridges is achieved.Through the theoretical analysis and numerical calculation,the design method is proved to be reasonable and suitable,and these can be reference to the seismic enforcement for bridges.