粘滞阻尼器在斜拉桥减震设计中的应用

Application of Viscous Damper to Aseismatic Design of Cable-Stayed Bridge

介绍了斜拉桥减震设计的思想以及粘滞阻尼器在斜拉桥减震设计中的应用,并以一座斜拉桥为例,在相同的地震波作用下,对飘浮体系、弹性约束体系和加粘滞阻尼器的半漂浮体系分别进行时程分析,比较了3种体系梁端及桥塔的水平位移、水平惯性力和桥塔的受力情况。研究表明:粘滞阻尼器能够改善斜拉桥的动力特性,不仅使得结构的位移和受力都是最小,而且提高了斜拉桥的抗震能力和耐久性,这种体系最能符合斜拉桥的减震设计思想。

The aseismatic design of cable-stayed bridge and the applying of the viscous dampers to the aseismatic design of cable-stayed bridge are introduced. And based on an example, under same seismic excitation, time-history analysis is used to the floating system, elastic restriction system and the halffloating system with the viscous dampers, and the horizontal displacement, the inertial force and the stress of the bridge tower of three systems are compared. The researches show that the viscous dampers can mend the dynamical characteristic of cable-stayed bridge system, by this it can not only minimize both the displacement and stress of this system, but also improve the aseismatic capability and wear of the bridge, so this kind of system can accord with the idea of the aseismatic design most.