Experimental and Numerical Investigation of the Cross-Sectional Mechanical Behavior of a Steel–Concrete Immersed Tube Tunnel

This paper presents a proposed static test and numerical study on the mechanical properties of steel-shell–concrete-structure-immersed tunnel nodes, which is used to investigate seismic performance damage mechanism nodes. The based immersed tube project in deep China channel, nodes representing outermost innermost vertical walls tunnel, i.e., L-shaped T-shaped node specimens, were designed fabricated at scale 1:5, specimens mainly subjected combined effect axial compression lateral displacement loads. results show that will exhibit brittle characteristics with high load carrying capacity energy dissipation during ultimate phase, while exhibits bending better ductility, so wall should be locally reinforced ensure necessary ductility structure actual project. In addition, by comparing calculation experimental results, it found there good agreement terms load–displacement curves crack distribution, shows modeling method this can accurately simulate guide section design tunnels steel shell–concrete structures.