Abstract
Shield-driven tunneling has been played a significant role recently as a standard method in urban tunnel construction. As the main-way road tunnels have to be connected with the ramp-way tunnels, development of an effective steel-concrete composite structure by using the longitudinal ribs of the steel segment as a shear connector has been sought for. However, the shear connector at the joint between different types of members has been hardly studied and yet its stress transfer mechanism has not been well understood. The authors carried out the destructive tests with a scaled-down specimen for the relevant connection, and examined the stress transfer mechanism and the shear transfer capacity carried by shear connectors and studs. A model to calculate the shear transfer capacity easily was developed and verified by comparing with the experiments and the analytical results based on the nonlinear finite element method.
