Whether the internal stress of this pattern meets the intension demand,and the economy and safety for misplaced-node section in structure design are verified.

In order to settle some problems involved in applying ANSYS into nonlinear Finite Element Analysis of RC structure,this paper discusses the nonlinear FEM method for staggered joint,incorporating its experimental result.

Beam-special shaped column structure with staggered joint comes into being, with the wide use of special-column-shear wall structure and staggered structure.

Specifications for staggered joint aren t contained in Code for Design of Concrete Structures GB50010-2002,so,the research on shear transfer mechanisms;seismic behavior and shear resistance of staggered joints is urgent.

Analysis of ratio of axial compressive force to resisting shear strength of reinforced concrete beam-column joints;

Research into fracture of steel frame beam-column joints;

The influence factor to the ultimate bearing capacity of concrete beam-column joints with placed ducts under axes-pressure;

The seismic resistant design method of reinforced concrete beam-column connections based on compression strut and softened truss models;

Therefore, the study on the behavior of the beam-column connections to improve ductility as well as to prevent brittle failure was carried out in this research.

Three-dimensional finite element method was employed toinvestigate the effect of the strength mismatching of the groove heamflange welds on the fracture toughness requirements in terms of crack tipopening displacement in welded beam-column connections, which pro-vides valuable suggestions for the design of beam-column connections andselecting welding materials.