锥形非固结隔震支座理论模型参数试验研究及其结构地震响应分析

提出了一种适用于低层及多层房屋抗震的锥形非固结隔震支座，建立了该支座在水平剪切、滑动和斜面压剪阶段的力学模型，对10组不同设计参数的支座试件进行了参数试验研究，包括坡度角、橡胶层厚度、加载位移及竖向压应力与支座水平力学性能的相关性，试验结果表明所提出的理论模型与试验结果吻合较好，得到了支座设计参数与耗能影响规律。并进一步给出了锥形非固结隔震结构的高宽比在不同场地的限值，Ⅰ、Ⅱ、Ⅲ和Ⅳ类场地的高宽比限值分别为2.3、1.7、1.3和0.5。通过有限元软件探讨其在地震作用下的响应规律，结果表明在不同力学参数下锥形非固结结构的抗震能力均较显著。

EXPERIMENTAL STUDY ON CONSTITUTIVE MODEL PARAMETERS OF NON-CONSOLIDATION TAPERED BEARING AND SEISMIC RESPONSE ANALYSIS OF STRUCTURES

Non-consolidation tapered bearing is designed for low-rise and multi-story buildings. The constitutive model consists of horizontal rubber-shearing phase, sliding friction phase and inclined rubber-compressing phase. The energy-consumption relationship between design parameters were discussed including the plate slope angle of inclined plane surface, the thickness of rubber sheet, horizontal loading displacement and vertical stress. 10 different sets of bearing based on the design parameters were studied in quasi-static experiments. The results indicated that the theoretical model is regarded as a good approximation. The relationship between design parameters and energy consumption was obtained. Furthermore, the limited aspect ratios of the bearing at different site were developed. The limited aspect ratio of the Ⅰ, Ⅱ, Ⅲ and Ⅳ sites are 2.3, 1.7, 1.3 and 0.5, respectively. The finite element software was used to research the seismic response under seismic effect. The numerical results indicated that an isolated structure has a significant advantage on reducing superstructure response under different mechanical parameters.