BENDING BEHAVIOR OF COMPOSITE HOLLOW RC FOR SUBMERGED FLOATING TUNNEL SYSTEM

Abstract

In case of a submerged floating tunnel system (SFTs), which is difficult to cast in-site underwater construction, it is modularized on land and then assembled them in the field. Therefore, it is essential to investigate the structural performance of the joints between the modules. In this study, the bending behavior of module joints in a steel composite hollow tunnel [1] by applying pre-stressing method to resist various external loads was experimentally [2] and numerically [3] analyzed to evaluate the safety for the bending deformation which is dominant in SFT. Test results show that there is a difference at the module joint portion in the performance depending on whether or not the inner steel tube is connected. Furthermore, considering the underwater environment, it is necessary to examine more various structural behaviors such as torsion which may affect the overall structure of the SFTs.rmance of the joints between the modules. In this study, the bending behavior of module joints in a steel composite hollow tunnel [1] by applying pre-stressing method to resist various external loads was experimentally [2] and numerically [3] analyzed to evaluate the safety for the bending deformation which is dominant in SFT. Test results show that there is a difference at the module joint portion in the performance depending on whether or not the inner steel tube is connected. Furthermore, considering the underwater environment, it is necessary to examine more various structural behaviors such as torsion which may affect the overall structure of the SFTs.