高速公路桥隧搭结构振动台试验研究

Shaking Table Test Ttudy on Bridge-tunnel Lap of Expressway

为探明桥隧搭接结构在地震作用下的动力响应规律,考虑不同的地震波类型对桥隧搭接结构动力效应的影响,按照一定的材料配比和模型比例制作了结构模型,进行了高速公路桥隧搭接结构的振动台模型试验.试验表明:地震波类型对于地震作用下结构的加速度响应效应并无明显影响,对于结构的动应变有明显影响,而激振幅值对结构有较明显的影响.同时,试验探明了桥隧搭接结构在不同地震波和激振幅值作用下的动力响应特性,为相应工程抗震设计提供了理论基础和试验参考.

The shaking table model test is one of the most effective test methods for studying the seismic capacity and failure mechanism of complex structures under earthquake action.In order to find out the dynamic response law of the bridge-to-building structure under earthquake action,considering the influence of different seismic wave types on the dynamic effect of the bridge-to-building structure,a structural model was made according to a certain material ratio and model ratio,and a high speed was made.Shaking table test of railway bridge and tunnel lap joint structure.The test shows that the type of seismic wave has no obvious influence on the acceleration response effect of the structure under earthquake action,and has obvious influence on the dynamic strain of the structure,and the amplitude value has a significant influence on the structure.The test has proved the dynamic response characteristics of bridge and tunnel lap structures under different seismic waves and excitation amplitude values,and provided theoretical basis and experimental reference for the seismic design of the corresponding engineering.