SBS沥青阻尼隔震垫性能研究

Research on the performance of SBS asphaltum damping isolation pad

SBS沥青阻尼隔震垫是由SBS改性沥青防水卷材与钢丝网交替叠置组合而成的。在BS隔震垫的基础上改用SBS沥青阻尼隔震垫进行了试验研究。试验结果表明,SBS沥青阻尼隔震垫具有较高的承压强度和很大的阻尼比,其水平剪切刚度随着剪应变的增加而下降,具有明显的软化特性。同时,为考察新型隔震垫的隔震效果,运用有限元软件ABAQUS对采用SBS沥青阻尼隔震垫的隔震建筑物进行数值模拟分析。结果表明,隔震结构顶层的加速度响应减小了40%-50%。

SBS asphaltum damping isolation pad is composed of SBS modified asphalt waterproofing materials and steel mesh with a combination of superimposed alternately. The experiment study of SBS asphaltum damping isolation pads was carried out bases on the BS isolation pad. The experiment results show that SBS asphalt damping isolation pad has a high bearing strength and a great damping ratio, its level shearing stiffness decreased with the shear strain increasing, and it has significant softening properties. Meanwhile, for inspecting the isolation effect of SBS isolation pads, finite element software was used to carry out numerical modeling analysis for the building adopting SBS asphalt damping isolation pad. The results show that the acceleration response of top floor of the seismic isolation structure reduces 40% - 50%.