Nonlinear FEM Analysis On SRC Joints And Application Of Composite Reinforcement Technique

As the development of high-rise buildings and new materials, the steel reinforced concrete (SRC) structural system have had the tremendous change. Meanwhile, the capability of SRC Beam-Column Joints become more important in the whole structural system, therefore, it's necessary to study the new structural pattern.Because the materials in SRC are nonlinear structural materials, a new three-dimensional nonlinear finite element model of proposed SRC beam-column joints in this paper. mostly based on the content of research.Firstly, under triaxial compression,average compressive strength formula of concrete will be proposed in the central part of SRC beam-column jionts will be proposed in this paper.The formula with the whole compressive strength formulas of SRC is compeare,which are pointed out in other literaturesSecondly,by using 3-D Reinforced Concrete Solid in ANSYS, SRC joints of five strength grades have been nonlinear analyzed and achieved the cracking, extreme load, stress, displacement and interlaminar deformation respectively. With the SRC jionts model, the crack resistance capacity, the shear strength, shear stress of steel and concrete, cracks form and aseismic behavior have been synthetically analyzed, which are proposed in this paper. The results have been compared with the data of other reference tests. Also, the main influence factors of SRC beam-column joints including concrete strength and the axial pressure of column are studied in this paper.In the last part of the paper, health situation of bridges has been detected non-metal by ultrasonic tester, and distribution of structural fractures has been evaluated on, which could provide theoretical basis for reinforcement analysis. Then the cracking areas of bridge are reinforced and renovated by the composite reinforcement technique of anchoring bond, and jonts are also dealed with by concrete pouring technology. Meanwhile, arch rib, which is exerted axial pressure on, are bonded and anchored steel plates, thus created casing hoop effect and ehance bearing capability come into being. This example illustrates that the feasibility of the technique can work in the practical application of engineering.