沥青油膏—双飞粉混合物动剪模量的试验

Dynamic shear modulus of ointment-heavy calcium carbonate powder mixture

为进一步研究钢筋—沥青隔震层在地震作用中的隔震动力表现,在50、100、150kPa3种竖向压力下分别对灰胶质量比为0、0.2、0.25、0.3的沥青油膏—双飞粉混合物进行了循环单剪试验,测出3种不同竖向压力下4种不同配比的沥青油膏—双飞粉混合物的动剪模量,绘出动剪模量随动剪应变的变化曲线并对其进行比较。研究结果得出:沥青油膏可以有效降低沥青油膏—双飞粉混合物的动剪模量;沥青油膏—双飞粉混合物的动剪模量随竖向压力增大而增大。

For the purpose of investigating the dynamic isolation behavior of the newly introduced steel-bar asphalt isolation system, the cyclic simple shear tests for ointment-heavy calcium carbonate powder mixture with different ratios were carried out under the consolidation pressure of 50 kPa, 100 kPa and 150 kPa, respectively. The dynamic shear modulus of the mixtures with different proportions under different consolidation pressures was measured. And the curves of G-y were obtained and compared. Results show that the ointment can efficiently reduce the dynamic shear modulus of the ointment-heavy calcium carbonate powder mixture, which increases with the intense of the consolidation pressure.