简易振动台试验设备研制

为了完成多桩型复合地基抗液化性能振动台试验,利用实验室已有的反力墙和作动器,设计了一个小型的简易单向振动台系统和堆叠式剪切模型箱。堆叠式剪切模型箱内部尺寸为1200mm×800mm×772mm,由8层铝合金框架和7层橡胶条叠合而成。利用ANSYS有限元软件对模型箱及地基-模型箱进行了动力分析,并通过饱和粉细砂地基模型振动台试验验证了模型箱的效果。结果表明,所设计的模型箱能够较成功地模拟天然场地的边界条件,为多桩型复合地基抗液化性能振动台试验的顺利进行打下基础。

Development of Simple Shaking Table Experiment Equipment

In order to complete shaking table experiment of multi-pile composite foundation liquefaction resistance, using existing reaction wall and actuator in laboratory, a small simple and easy unidirectional shaking table system and laminar shear model box were developed. The internal dimensions of laminar shear model box are 1200mm in length, 800mm in width and 772mm in height, and it is made of 8 layers of aluminum alloy frame and 7 layers of rubber strip. Dynamic analysis of model box and foundation-model box was carried respectively by using finite element software ANSYS. The effect of model box was verified based on shaking table experiment of saturated silt sand foundation model. Experimental results show that designed model box can successfully simulate natural site boundary conditions and ensure that shaking table experiment of multi-pile composite foundation liquefaction resistance can be carried out smoothly.