Abstract:
In order to discuss the seismic performance of the split-prefabricated utility tunnel, the seismic analysis methods of the utility tunnel are firstly summarized. Then, based on the response displacement method, the numerical model is established by using the finite element software SAP2000, and the analysis of the seismic resistance design and recalculation of the utility tunnel are conducted. In addition, the effects of various load cases on the internal forces of the structure are analyzed. The results show that the maximum bending moment and shear force are mainly distributed between the side wall and the roof. Moreover, the seismic design of utility tunnel can be directly carried out according to the load standard combination, but for those areas with high-intensity earthquake design, the seismic resistance combination may play a key role. The split sections of the prefabricated utility tunnel show relatively small mechanical responses,which is beneficial to the connection approach of the pre-stressed bars, and also, the bearing capacity of the structure’s corner meets the design requirements after the corresponding re-calculation in accordance with codes.