双曲面球型减隔震支座设计参数分析研究

Analysis and Research on Design Parameters of Hyperboloid Spherical Seismic Isolation Bearing

摘要:

双曲面球型减隔震支座是我国研发的一种新型减隔震装置，正在被广泛应用于高烈度区大跨径连续梁桥的抗震设计中。该支座滑动球面的摩擦系数μ、球心距H和固定支座的水平极限承载力Fu是影响其抗震性能的3个重要参数。通过对这3个参数进行深入研究，得到桥梁抗震性能与3个设计参数的变化规律，可为采用双曲面球型减隔震支座进行抗震设计的桥梁提供指导。

Abstract:

The hyperboloid spherical seismic isolation bearing is a new type of seismic isolation bearing developed in China, and now is widely used in the seismic design of long-span continuous girder bridge in high intensity areas. The friction coefficient μ of the sliding sphere of this bearing, the distance H between the center of the sphere and the horizontal ultimate bearing capacity Fu of fixed bearing are three important parameters influencing the seismic performance. The above three bearing parameters are studied deeply to obtain the variation rules of seismic performance and three design parameters of the bridge, which provides the guidance for the seismic design of bridges with the hyperboloid spherical seismic isolation bearings.