动静耦合剪切模型箱的设计分析及试验验证

Design and test verification of coupling dynamic and static shear model box

根据地层在地震中的响应特性,设计了一种动静耦合剪切模型试验装置。该装置是由侧板组件、阻尼组件和端面板组件组成的可剪切变形的空间结构体。目前在研究隧道工程结构地震响应机理的动力试验中所采用的模型箱主要有刚性模型箱、柔性模型箱以及层状剪切模型箱,但这3种模型箱因各自的结构特点都具有一定的缺陷和不足。为了能够更好地满足静力及动力边界效应,设计了该新型试验模型箱,并通过振动台动力试验验证该模型箱的有效性。基于该模型箱提出并验证了利用拟静力试验方法研究隧道的振动响应。通过拟静力试验和动力试验结果的对比,认为拟静力试验可以一定程度替代动力试验。

According to the response of stratum in earthquake,a coupling dynamic and static shear model box is designed. This box is a spatial structure system with shear deformation composed of side panel assembly,damping assembly and elevation panel assembly. The types of model boxes used to research the seismic response mechanisms of underground structures are mostly rigid,flexible and layered-shear,which have some defects and shortcomings. The model box and a new test method named the pseudo-static method are introduced and their effectiveness is validated by a dynamic test with a shaking table. By comparing the results of the dynamic test and the pseudo-static test,it is determined that it is possible for the pseudo-static method to replace the dunamic test to some extent.