短轴向剪切加载模式下超大型黏弹阻尼墙力学性能试验
Experiments of mechanical properties of super large viscoelastic damping wall under shear loading along transverse direction

为了提高黏弹性阻尼装置温度相关性的准确度、最大阻尼力和力学性能,首先开展了黏弹性材料的温度扫描试验,然后设计了一种新式阻尼装置试验方法,即短轴向剪切加载模式方法,采用该试验方法对新型“5+4”式超大型黏弹性阻尼墙构件进行了力学性能试验.试验给出了黏弹性材料的tanδ-T,G′-T,G″-T曲线、黏弹性阻尼墙构件力-位移滞回曲线以及力学性能参数(最大阻尼力、损耗因子、等效阻尼系数、存储刚度、损耗刚度、剪切损耗模量、剪切储能模量等)的频率相关性和位移幅值相关性等.结果表明:黏弹性阻尼墙损耗因子峰值(0.77)与由黏弹性材料温度扫描试验得出的损耗因子峰值(0.79)只有微小差别,说明所设计的“5+4”黏弹性阻尼墙构件在短轴向剪切加载模式下可以很好发挥黏弹性阻尼材料的阻尼性能.
To improve the accuracy of temperature dependence of viscoelastic damping device, the temperature scan experiments of viscoelastic material were conducted. Then, the system of shear loading along the transverse direction was put forward and the experiments of mechanical properties of “5+4” super large viscoelastic damping wall(VDW)were developed using this system. The curves of tanδ-T, G′-T and G″-T of the viscoelastic material and the force displacement hysteretic curves were obtained through experiments. In addition, dynamical performance, such as the maximum damping force, loss factor, equivalent damping coefficient, storage stiffness, loss stiffness,loss modulus, storage modulus of VDW, were obtained. Results show that the loss factor(0.79)of viscoelastic material only slightly differ from the loss factor(0.77)of VDW, which proves that the “5+4” super large VDW has excellent damping properties under the system of shear loading along the transverse direction