Numerical Simulations and Parametric Analysis of Seismic Performance of the Joints of Prefabricated Corrugated Steel Utility Tunnels

Based on the comprehensive test results of an actual project, the simulated static test of the utility tunnel was carried out, the model was establish based on the ABAQUS finite element analysis software. The mechanical parameters measured by material test are used in the model and the accuracy of the numerical calculation model is verified by comparing with the test results. In this study, parametric analysis is conducted using the finite element simulation method to assess the seismic performance of the corrugated steel utility tunnel which systematically examines the impact of various parameter on the seismic performance of the structure. The numerical analysis reveals that the presence of the flanges at the connection nodes has a negative effect on the seismic performance of the structure, however, these flanges serve as stiffening ribs, effectively enhancing the load-bearing capacity and stiffness of the structure. The thickness of the corridor and the waveform of the corrugated steel plate are identified as crucial factors influencing the hysteresis performance of the structure. Conversely, the flange thickness, section shape and grade of high-strength bolts have a lesser influence on the seismic performance. It is recommended to position the bolts as close as possible to the connection between the flange and the corrugate plate to minimize the occurrence of disconnection between the flanges, provided installation requirements are met. Furthermore, welding the four pieces together enhances the seismic performance of the structure. The results in this paper provide a reliable theoretical and experimental basis for the seismic research design calculation and engineering application of the prefabricated corrugated plate integrated utility tunnel.