The Finite-element Analysis On Seismic Behavior Of Different High Strength Steel And High Strength Concrete Coupling Beam Forms

Coupling beam design is a difficult problem, which is prone to be over reinforced, the Chinese code has put forward a few solutions such as reducing the rigidity of coupling beams,configuring diagonal bars, configuring diagonal braces, configuring double coupling beam or multi-coupling beams. The method of fiting multilayer stirrups, using high strength steel fiber reinforced concrete or steel reinforced concrete have also been put forward by some experts at home and abroad. But all These methods have disadvantages. If a kind of coupling beam with not only good seismic performance but also saving materials and convenient constructing is explored, it will be very popular.In this paper, the seismic behavior of different forms of coupling beam is analyzed by using the large scale general software ABAQUS, which can be divided into the following four parts,Firstly, the feasibility of finite element model method is tested, the FEA results are compared with the results of experiments, and the two fit well, then we can conclude that the finite element method is feasible.Secondly, some optimized models are put forward which aim to strengthen the weak position of the wall in the experiment. The FEA models are established. The comparison of the strengthened wall with the common shear wall shows the advantage of the optimized walls.Thirdly, to test the effect of slit width to the double coupling beams, five FEA models are established. The load-displacement curve?stress damage state and the change of internal force of each model are compared. The final analysis conclusion is that the slit width has little impact to coupling beams.Fourthly, to explore the excellent form of coupling beams, seven FEA models are established. Through comparison of the failure process and load-displacement curves, plastic or brittle failure is judged, and the key points are obtained. Then the initial stiffness is acquired, which can solve the reduction of stiffness in the elastic period of the single coupling beam.In summary, coupling beam form is screened which has not only superior seismic behavior but also material saving and convenient construction feature.