Preparation and Blast Responses of Basalt Fiber-Reinforced Polymer (BFRP) Bar Reinforced Shield Tunnelling Segments

Abstract

BFRPs has the advantages of light weight, corrosion resistance and good durability compared with steels, which is expected to solve the above problems when applied to shield tunnelling segments. In this study, the preparation process of basalt fiber-reinforced polymer (BFRP) bar reinforced shield tunnelling segment (BSTS) is described in detail against the background of shield tunnelling segment actually used in engineering. In order to investigate the blast resistance performance of the BSTS under blast loading, the test process is simulated using LS-DYNA finite element analysis software. The results show that the main damage modes of BSTS under proximity blast loading can be categorized as cratering, cracking, spalling and rupture. With the decreasing Scaled distance, the top surface blast crater is expanding, and the concrete on the back surface is further spalling, showing more obvious local damage characteristics. Provide reference for the design of shield tunnel lining structure's anti-explosion performance.