【摘要】 研究各种因素对高G值超高阻尼隔震橡胶支座(简称SHDR)水平力学性能频率相关性的影响。采用反复加载的试验方法,研究G值大于等于0.8MPa的SHDR支座在不同水平应变、不同竖向压力、不同温度、不同内部橡胶G值(0.8MPa,1.0MPa及1.2MPa)以及不同加载顺序情况下的水平性能频率相关性。分析上述各种因素对高G值SHDR支座的等效刚度及等效阻尼比频率相关性的影响程度,给出除温度外综合考虑上述各种因素后的拟合经验公式。研究表明,竖向压力、水平应变、支座内部橡胶G值和频率加载顺序对其影响较小,而温度对其有较大程度的影响。总体上讲,支座在常温下的等效刚度整体随加载频率的增加而呈非线性增加,而等效阻尼比随频率的增加而呈非线性减小。更多还原

【Abstract】 The intention of this paper is to study various factors which affect the frequency dependency of horizontal mechanical property of Supper High Damping Rubber Bearing(SHDR) with high shear modulus. The cyclic loading experiment method was adopted to study the effect of shear strain, vertical pressure, temperature, shear modulus of inner rubber of isolator and sequence of loading on the frequency dependency of horizontal mechanical property of SHDR with greater than 0.8MPa shear modulus. The degree of effect on the equivalent stiffness and equivalent damping ratio of SHDR about them was analyzed, some fitted formulas were given, in which all kinds of factors were considered except temperature. Research results show that the effect of vertical pressure, horizontal strain, shear modulus of inner rubber of bearing and sequence of loading on the frequency dependency of SHDR are small, temperature has a certain degree effect on them. As a whole, the equivalent stiffness of SHDR increases nonlinearly with the increase of frequency of loading, the equivalent damping ratio decreases nonlinearly with the increase of frequency.更多还原