隔震支座模型力学参数试验研究

Experimental study on mechanical parameters of isolation bearing model

用于结构振动台试验的隔震支座模型,由于受到加工工艺及试验加载条件等因素的影响,模型支座的力学性能与常规橡胶支座存在一定差异。其中铅芯橡胶支座屈服前刚度与屈服后刚度的比值关系到支座模型和结构整体模型的设计以及进行建模计算对比。为了研究隔震支座模型的力学性能并为隔震振动台试验研究提供依据,通过压剪试验研究了隔震支座模型的力学性能,发现铅芯橡胶支座屈服前刚度约是屈服后刚度的两倍,并通过振动台试验实测支座剪力-侧移滞回曲线得到进一步验证。

Due to the influence of processing technology and test loading conditions, the mechanical properties of the model bearing are different from those of the conventional rubber bearing. The ratio of the stiffness before and after yielding of the lead rubber bearing is related to the design of the bearing model and the overall structure model, as well as the comparison of modeling calculation. In order to study the mechanical properties of the isolation bearing model and provide the basis for the isolation shaking table test, the mechanical properties of the isolation bearing model are studied through the compression shear test. It is found that the stiffness before yield of the lead rubber bearing is about twice that after yield, and it is further verified by the shaking table test.