摩擦摆减隔震支座在高烈度区高架桥的减震效果分析

Analysis on Damping Effect of Friction Pendulum Bearings(FPB) for Elevated Bridge in High Earthquake Intensity Region

该文介绍了摩擦摆式支座减隔震工作原理。该类支座减隔震性能主要影响参数为摩擦副的摩擦系数和球面等效曲率半径。为了研究高烈度区该类支座减隔震效果,通过对某高架桥一联3×30m预应力混凝土连续箱梁桥模型的计算分析,得出在不同参数组合下桥梁结构的地震响应,讨论了各参数对结构响应的影响规律,并对工程应用中选取较优的参数提出了建议,为高烈度区修建高架桥梁积累经验。

The article introduces the damping principle of FPB.The main effect parameters of damping performance of this bearing are the friction coefficient and the spherical equivalent radius of curvature.In order to study the damping effect of this bearing in the high earthquake intensity region,through the calculation and analysis of a 3 × 30 m prestressed concrete continuous box girder bridge model of an elevated bridge,the article gives the earthquake responses of the bridge structure with the different parameter combinations,discusses the influence rule of each parameter on the structure response,and puts forward the proposal to select the more excellent parameters in the engineering application so as to accumulate the experience for the construction of elevated bridges in the high earthquake intensity regions.