Research on anti-impact and damping performance of particle-filled steel pipe support components
In order to solve the problem of weakening support effect due to the cracks caused by concrete shrinkage inside the concrete-filled steel pipe,the anti-impact and damping performance of sandstone particle-filled steel pipe was studied based on the smooth particle flow(SPH)method.The finite element software is used to establish a model of sandstone-filled steel pipe and concrete-filled steel tube subjected to axial impact and cyclic loading,which is compared with the damping ratio through the energy absorption index and finally filled into the arch support of the roadway to analyze the effect of both sup-ports.The results show that for the roof axial impact,the roof energy attenuation of sandstone-filled steel pipe is greater,The internal plastic dissipation energy density is greater,and the probability of producing cracks is lower.The internal particles of sandstone-filled steel pipe have good adhesion and friction energy dissipation,which gets into the recovery section earlier,the constant load section is more stable,and the efficiency of energy absorption is better.Under the cyclic loading action,the sandstone-filled steel pipe has the better adhesion and friction energy dissipation,the width increase of hysteresis curve is small,and the damping ratio of sandstone-filled steel pipe is larger than that of concrete-filled steel pipe,with better energy dissipation effect.In the roadway support,the displacement of roadway with sandstone-filled arch support and the equivalent plastic strain value of the arch are basically smaller than those of the concrete-filled steel pipe arch,in which the displacement of the roadway at the bottom of both sides with serious bending position and the equivalent plastic strain of the arch are larger than that of the concrete-filled steel pipe.The research results can provide a useful reference for the use of steel pipe support components in the roadway support.
concrete-filled steel pipesandstone-filled steel pipeenergy-absorbing anti-impactdamping energy dissipa-tionroadway support
万方数据
维普
