Abstract
Full-assembled underground station (FUS) is a novel prefabricated underground station that fully uses assembled precast hollow components (PHC). The PHC with joint constraint and hollow-section effects determines the performance of the FUS. This study foremost conducted a multigroup full-scale experimental study on PHCs. A finite element analysis was performed to analyzed the relationship between joint constraint effect and hollow-section effect. A mechanical model of the assembled PHC was proposed. The hollow-section effect of PHC was assessed, and the results were applied to FUS. The main conclusions are as follows. (1) The performance of the PHC with the proper hollow-section size ratio (SR) meets the design requirements, whereas one with large SR may cause insufficient performance redundancy. (2) The bending performance of assembled PHC strengthens with the increase of joint constraint. The hollow-section effect only manifests in the PHCs with robust joint. (3) An SR ≤ 0.5 has a limited effect on PHC performance, whereas an SR ≥ 0.5 accelerates performance degradation. Furthermore, the hollow-section distribution rate (DR) presents a competing relationship between the PHC performance and weight reduction. (4) The application of the mechanical model on Shenzhen Metro FUS achieved promising benefits. The mechanical properties of PHC were comparable to those of solid components with sufficient weight reduction. This study provides technical guidance for the development of Shenzhen Metro and facilitates FUS application in low-carbon cities.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
