地震作用下西堠门大桥设置Lock-Up Device可行性研究

Lock-UpDevice是一种类似速度开关的装置,可以改变结构的平动动力约束方式。在舟山大陆连岛工程西堠门大桥的设计、建设过程中,对在使结构产生较大运动速度的荷载作用下,为了使加劲梁不产生额外的梁端位移;或在大的冲击作用下梁体对伸缩缝不产生过大的速度以损害伸缩缝,进行了梁端设置Lock-UpDevice的可行性研究。该文对地震作用下梁端设置Lock-UpDevice于西堠门大桥抗震性能的影响进行了详细的分析和研究。

Feasibility Study of Lock-up Device Installed on Xihoumen Bridge under Action of Earthquake

The look-up device is a device similar to the speed switch. It can change the flat moving power constraint way of the structure. The feasibility study is carried out for the look-up device installed at the beam end in the course of the design and construction of Xihoumen Bridge of Zhoushan Mainland Linking-up Island Project, under the loading action of larger movement speed produced by the structure, in order to make the stiffened beam not produce the additional beam end displacement, or under the larger shock action, to make the beam body not produce over-large speed to damage the expansion joint. The article analyzes and studies in detail the influence of look-up device installed at beam end to the anti-earthquake performance of Xihoumen Bridge under the action of earthquake.