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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 idea of shock absorption design for cable-stayed bridges and the application of viscous dampers in the design of shock absorption for cable-stayed bridges are introduced. Taking a cable-stayed bridge as an example, under the same seismic wave, the influence of floating system, elastic restraint system and The time-history analysis of semi-floating system with viscous dampers was carried out. The horizontal displacement, horizontal inertial force and force of the tower were compared among the three systems. The results show that the viscous damper can improve the dynamic characteristics of cable-stayed bridge, which not only minimizes the displacement and stress of the structure, but also improves the seismic capacity and durability of the cable-stayed bridge. This system can best fit the cable-stayed bridge The shock absorption design idea.