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Experimental study of seismic response reduction effects of particle damper using substructure shake table testing method

机译：基于子结构振动台试验方法的减振器减震响应试验研究

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摘要

In order to evaluate the effectiveness of particle dampers (PDs) on seismic response reduction of structures, a series of substructure shake table tests have been conducted. A new family of explicit model-based integration algorithms is used to develop the substructure shake table testing (SSTT) method. To implement the SSTT method, a testing system on the basis of the Quanser shake table II is constructed. The effectiveness and accuracy of the proposed SSTT method and the testing system are verified by comparing the results of complete structure shake table tests and the corresponding substructure shake table tests. Mass ratio, which is defined as the ratio of the damper mass to the structural mass and structural damping ratio are taken as two main parameters in the parametric analyses. Twelve cases of PDs, which are categorized into three patterns, with different materials, sizes, and amounts of particles are selected as the experimental substructures. The substructure shake table test results indicate that the overall seismic response reduction effects of three different types of PDs are very close with same mass ratio. Two seismic response reduction ratios in terms of reducing peak and root-mean-square relative structural displacements are defined to quantify the seismic response reduction effects of the dampers. It can be concluded from the experimental studies that both seismic response reduction ratios increase as the mass ratio increases and decreases as the structural damping ratio increases.
机译：为了评估减震器对降低结构地震响应的有效性，已进行了一系列的子结构振动台试验。一个新的基于显式模型的集成算法家族被用来开发子结构摇表测试（SSTT）方法。为了实现SSTT方法，构建了基于Quanser振动台II的测试系统。通过比较完整结构振动台测试结果和相应的子结构振动台测试结果，验证了所提出的SSTT方法和测试系统的有效性和准确性。在参数分析中，将质量比定义为阻尼器质量与结构质量之比和结构阻尼比作为两个主要参数。选择十二个局部放电的案例，将其分为三种模式，分别使用不同的材料，大小和颗粒数量作为实验的子结构。下部结构振动台试验结果表明，在质量比相同的情况下，三种不同类型的PD的整体减震效果非常接近。根据减小峰值和均方根的相对结构位移，定义了两个地震响应减小率，以量化阻尼器的地震响应减小效果。从实验研究可以得出结论，两种地震响应的减小率均随质量比的增加而增加，随结构阻尼比的增加而减小。

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