Experimental Investigation And Finite Element Analysis Of Joints Of Outer-plated Steel-concrete Composite Beam-column

As a new type of composite structure, composite beam with U-section steel has the advantage of other composite beams and overcomes their disadvantages at the same time. With the characteristics of high load capacity, strong stiffness, construction convenience, industrialized production and good economical index, it has already become more promising in application. But the joints connecting with the column with it is limited, which restricted the promotion and application of this new composite beam. This research presents two new types of joints connecting reinforced concrete column with outer-plated steel-concrete composite beam reference to the joint connecting reinforced concrete column with steel beam and reinforced concrete column with reinforced concrete beam.At first the low-cycle repeated load tests were conducted with investigation of the ductility and energy dissipation of both the two new types of joints. Researches indicate that significant shear-resistant capacity and satisfactory energy dissipation ability can be obtained by appropriate constructional measures.Secondly the finite element software ANSYS is applied for nonlinear numerical simulation. This paper introduces the method of modeling and compared the results between experimental results and finite element analysis results. It shows that the results between experiment and finite element analysis agree well on elastic stage. The load-bearing capacity and strain of finite element analysis results are higher than experimental results but still showed the working status of joints. There are difference between experimental results and theory results. The difference caused by test device.At last the force mechanism of joints is investigated and the formula for calculating the shear capacity of core area of joints is presented.