Mechanical Properties Analysis Of Large Thrust Fixed Bracket In Heating Shield Tunnel

According to design features of fixed bracket in heating shield tunnel, this paper considers fixed bracket, ring beam and segment as a unified stress system, and makes analysis of the system. Through analysis results of the three parts and the relationship between them, Mechanical properties and design rationality of the fixed bracket are expected to be sought.Modified Routine Method and Multi-hinge Ring Method are chosen in computing, which are commonly used in analysis. In this paper, large-scale general finite element analysis software, ANSYS, is used. Firstly, the system is calculated with two methods before and after exerting fixed bracket and ring beam in static state. Secondly, comparative analysis of the computing results is made between two methods. Then, the system is calculated again within temperature field, the results are compared with those obtained in the static state from three aspects.By analyzing and comparing the computing results, the deformation, stress characteristic and distribution of fixed bracket are summarized, and the interaction between fixed bracket and ring beam and segment are also presented. Based on the results, some suggestions on fixed trestle and ring beam are given. In the end, some prospects for related issues to be analyzed are proposed, hoping to provide some reference for follow-up study or design on fixed bracket in heating shield tunnel.