In order to better optimize the anti-explosion design of urban pipe gallery structure,it is very necessary to study the dynamic response characteristics of gas explosion of pipe gallery.Using the finite element software ANSYS/LS-DYNA,the finite element calculation model of the pipe gallery structure was established,and the equivalent internal energy method was used to simulate the gas explosion loading.Based on this model,the failure and response characteristics of the pipe gallery structure were analyzed by studying the propagation attenuation law of shock wave excited by gas explosion and its dynamic influence on the pipe gallery structure.The results show that the peak pressure of gas explosion shock wave decreases gradually with the increase of propagation distance,and the duration of overpressure becomes shorter at the same time.The reflection and superposition of the shock wave on the wall of confined space cause the peak pressure to increase slightly in the later stage of propagation,but the whole attenuation is in a polynomial form.The explosion damage is mainly concentrated in the corner of the gas warehouse or the position where the structure changes suddenly.The pressure relief port is set on the top of the gas warehouse,which can effectively avoid the damage effect of the concrete in the upper passage warehouse.The higher stiffness of the corner of the pipe gallery leads to a weaker vibration response,while the resultant vibration velocity in the middle of the wall can reach 0.4 m/s.Under the condition of full warehouse gas explosion,the local concrete of pipe gallery structure has through-wall cracks,but there is no overall structural damage.