超高应力隔震组合支座的基本力学性能研究

Study on fundamental mechanic properties for composed bearing with high compression stress

提出了1种超高应力隔震组合支座高性能隔震系统,该隔震系统是由多个橡胶支座按设计所需规则组合而成。建立了高性能隔震系统回转刚度理论公式、水平刚度、竖向刚度和屈曲应力的相关理论公式,并采用300型缩小试件对HPIS高性能隔震系统组合支座进行了竖向刚度、屈服后刚度、屈服力等基本性能和相关性的低周反复加载试验。研究结果表明:高性能隔震系统组合支座相对单体橡胶支座,在回转刚度、压应力稳定性及屈曲应力等方面均有显著提升。

The introduction of a high performance isolation system is provided, which is composed of multiple rubber bearings according to certain rules. The theoretical formulas of rotary stiffness, horizontal stiffness, vertical stiffness and buckling stress are given. The basic performance and correlation of HPIS＇ s vertical stiffness, post- yield stiffness and yield force are studied by the repeated low cycle loading test on reduced specimens with 300mm diameter. The results show that the performance in rotary stiffness, compressive stress stability and buckling stress of HPIS increase significantly relative to single rubber bearing.