Experimental Study on Dynamic Response of the Rock Shed Under Rockfall of Different Shapes Impact
In order to investigate the influence of rockfall shape on the dynamic response of rock shed structure and impact load of rockfall,the frame type rock shed was taken as the research object.The changes law of the rock impact force,impact compressive stress,displacement and vibration accelera-tion of the rock shed roof slab under the impact of rock fall with different shapes were studied by the reduced scale model test.The results show that the rockfall shape has significant influence on the dis-placement and vibration acceleration of the rock shed roof slab.Compared with the response of the im-pact of cubic rockfall on the roof of the shed,the displacements of the rock shed roof slab are de-creased by 41.1％and 76.1％respectively,and the vibration accelerations of rock shed roof slab are reduced by 35.7％～68.9％and 71.7％～87.6％respectively,under the impacts of spheroidal and el-lipsoidal rockfalls at different heights.The impact force and impact compressive stress of the cubic rockfall are the largest,followed by the spheroidal rockfall,and the ellipsoidal rockfall is the smal-lest.
万方数据
维普
