Seismic finite element analysis of underground integrated pipe corridor based on generalized reaction displacement method

An underground integrated pipeline corridor is a long-line structure that accommodates various municipal pipelines such as water supply, reclaimed water, storm water, communication, heat, electricity, and natural gas. Seismic hazard is the main factor affecting the safety of this important urban lifeline project, so the seismic analysis of the underground integrated pipeline corridor is urgent. To this end, in this paper, based on the generalized reaction displacement method, the finite element model of the standard section of the pipe corridor under the action of the earthquake is established, and the displacement, as well as the internal force response of the pipe corridor under the action of the earthquake, is obtained. The results show that the junction between the top of the standard section of the integrated pipe corridor and the outer slab is the key part for shear and bending tests, and the reinforcement in the span of the outer slab also needs to be focused on. Simulation and calculation by the physical stochastic seismic model in this paper show that the generalized reaction displacement method is more applicable and suitable for seismic finite element analysis of integrated pipe corridor, which lays the foundation for realizing refined analysis of dynamic reliability of underground integrated pipe corridor.