双球面减隔震支座等效摩擦系数理论分析与试验研究

Theoretical Analysis and Experimental Study of Equivalent Friction Coefficient for Hyperboloid Spherical Anti-vibration Bearing

对双球面减隔震支座的主要参数等效摩擦系数进行理论分析、数值模拟及试验研究,为桥梁、建筑结构的抗震设计与分析提供参考。试验研究包括在竖向承载力和加载频率不同时等效摩擦系数的对比分析,并分析支座等效刚度、等效黏滞阻尼比及滞回曲线。结果表明:支座滞回曲线的试验值与模拟值、理论分析结果基本接近,验证了支座的等效摩擦系数理论公式的正确性;支座主要设计基本参数及等效摩擦系数的模拟值及试验值与理论值基本相符,进一步验证了支座的等效摩擦系数理论公式的合理性。

In order to guide the bridge and building structure seismic design and analysis,theoretical analysis,numerical simulation and experimental study are conducted to study the key parameter of equivalent friction coefficient of hyperboloid spherical anti-vibration bearing. The experimental study includes the comparative analysis of the equivalent friction coefficient with different vertical bearing capacity or loading frequency,and the equivalent stiffness and equivalent viscous damping ratio and hysteresis curve of the bearing are analyzed. The results show that the test results and the simulation results are close to the theoretical analysis results,which verifies the correctness and rationality of the theoretical formula of the equivalent friction coefficient of the bearing. Ultimately,the main basic design parameters,the test value and simulated value of the equivalent friction coefficient of the bearing are basically in agreement with the theoretical values,which further verifies the rationality of the formula.