A Scheme Of Shaking Table Test And Shock Absorption Measure Study In Tunnel Of Highway In Seismic Region With Strong Motion

The scale of highway tunnel is being extruded more and more longer in China due to economic flourishingly developing so that it is time to built seismic design method for lining structures. And the requirements of precaution and reduce disaster also make it good as soon as possible. The analysis method of earthquake response which the lining structures in seismic region with strong motion is attention for people. A scheme of large-scale shaking table test was designed aiming at a tunnel in LinZhi area in this paper. And at the same time, and a calculation is done for the highway tunnel entrance at the high-intensity earthquake zone, some conclusions was obtained about comparative analysis shock absorption effect of different shock absorption measures. First, the great data of the earthquake disaster for the tunnel and underground structure in home and abroad are analyzed .The summarizing the mode of failure, the influence factors and failure mechanism is conducted for the disaster occurred in the mountain tunnels .A detailed exposition about Newmark's step-by-step implicit integration method solving dynamic equation was done for the high stability and precision. And a illustration about 3D viscous-spring artificial boundaries that can prevent the calculation results occurs high errors was introduced. In addition, The selection of importing earthquake wave and filtering theory was described in detail for saving calculation and reducing memory consumed.Then, A scheme of large-scale shaking table test for tunnel outlet of freeway tunnel in seismic region with strong motion was done, and putting test purposes. Furthermore devices for shaking table test, geometric and physics similarity relation was proposed and described in detail. At the same time, the pouring process and loading process of the model test was prepared in paper.At last, a transient dynamic calculation of two shock absorption in the highway tunnel entrance at the high-intensity earthquake zone was completed. And based on four calculation cases (no shock absorption, no seismic joint; has shock absorption, no seismic joint; no shock absorption, has seismic joint; has shock absorption, has seismic joint) obtained different vibration damping measures'contribution rate for reducing principal tensile stress and principal compressive stress.Then, vibration damping measures'effect was compared analysis in this paper. These results can be used to reference for another similar engineering.