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采用反复加载的试验方法,研究了G值大于等于0.8 MPa的LRB支座在不同水平加载频率、不同水平应变、不同竖向力加载顺序、不同内部橡胶G值(0.8、1.0、1.2 MPa)以及不同温度情况下的水平性能竖向压应力相关性。分析了上述各种因素对高G值LRB支座的屈服后刚度及屈服力竖向相关性的影响程度,给出了综合考虑上述各种因素后拟合的经验公式。研究表明,水平加载频率、水平应变及支座内部橡胶G值对其影响较小,而竖向压力的加载顺序及温度对其有一定程度的影响。综合各种因素,支座屈服后刚度整体随竖向压力的增加而线性减少,屈服力随压力的增加而线性增加。在高压状态下屈服力的拟合经验公式应用,应充分估计其误差。
The effects of different loading frequencies, different horizontal strains, loading orders of different vertical forces, different internal rubber G values (0.8, 1.0, 1.2 MPa) and Horizontal Performance Vertical Compressive Stress Correlation at Different Temperatures. The influences of these factors on the post-yield stiffness and vertical correlation of yield strength for high G-value LRB bearings are analyzed. The empirical formula after fitting the above factors is given. The research shows that the horizontal loading frequency, horizontal strain and the rubber G value inside the support have less influence on it, but the loading sequence and temperature of vertical pressure have a certain degree of influence on it. Based on various factors, the stiffness of the bearing after yielding decreases linearly with the increase of the vertical pressure, and the yield strength increases linearly with the increase of the pressure. The application of fitting empirical formula of yield strength under high pressure should be fully estimated.