Steel-concrete composite structures are widely used in high buildings for its excellent
seismic behaviors, whereas faults or cracks, which have great influence on interfacial mechanical
behaviors of structural members, inevitably form near the interface between steel and concrete during
the process of molding. Therefore, it is necessary to study the mechanical characteristics of the crack
tip near the interface. In this paper, the application scope of the path-independence of J-integral in
steel-concrete composite structure with a crack is discussed. According to the conservation law of
J-integral for the steel-concrete composite structure with a crack parallel to the interface, a hypothesis
that the value of strain energy release rate (SERR) of the mode-$fracture is independent of the crack
location when the crack is parallel and close to the interface is put forwarded. And this hypothesis is
verified through finite element method (FEM). A schematic model for a skew crack near the
steel-concrete interface is provided. The variation law of SERR with the Dundur’s parameters and the
angle between crack direction and interface are calculated by FEM. At last, calculating method of the
stress intensity factor as well as the SERR for a skew crack near the interface is suggested. All these
may contribute to further investigation on interfacial mechanical behaviors for steel-concrete
composite structure.
Dynamic mechanical properties and comparison of two constitutive models for martensitic stainless steel 0Cr17Ni4Cu4Nb
