Steel Fiber Reinforced Concrete Shear Wall With Boundary Elements

《Code for design of concrete structures》(GB50010-2010) has improved t-he strength grade of concrete to high strength concrete, the trength grade of con-crete related issues of section caused by smaller and brittleness highlights the sei-smic behavior of shear walls.Rein forced concrete shear wall bearing capacity islow,poor ductility and cracking, generally increase with the method of improvingreinforcement ratio to compensate for these shortcomings. But high reinforceme-nt ratio not only difficult to effectively improve the cracking behavior, energy di-ssipation capacity and ductility of shear walls, but will affect the concrete pouringand fully vibration, and worsening the construction conditions. So how to cani-mprove shearwall bearing capacity and improve the seismic performance has bec-ome a serious problem.Steel fiber reinforced concrete is a new concrete based on composite mater-ial in the ordinary concrete mixed with randomly distributed steel fibres.It notonly has many advantages but also has the characteristics of ordinary concrete.It can effectively block the development of cracks in concrete. Ordinary concretestructure due to the low tensile strength and easy to crack, after adding steel fi-ber can improve concrete tensile, flexural and shearmechanical strength properties.In view of the characteristics of high rise shear wall structure in boundaryelement stress is complex, difficult construction, puts forward the method to imp-rove the seismic performance of the local steel fiber reinforced shear wall bound-ary elements, and the form of shear wall named frame of steel fiber reinforcedconcrete shear walls.First of all, through physical model test to establish therefer-ence frame of steel fiber reinforced concrete shearwall finite element model sim-ulation, by comparing the experimental data with the Ansys finite element meth-od, the feasibility study of steel fiber reinforced concrete shear walls. Secondly, a further study of the effect of steel fiberwith Ansys finite element method, the volume ratio and axial compression ratio on the frame of steel fiber reinforced concrete shear wall bearing capacity and ductility.Through the research discovery, the constraints in the shear wall edge me-mber (fixed-endcolumn) frame of steel fiberrein forced concrete shear walls withsteel fiber, with the increase of steel fiber content, has certain promotion effect,the bearing capacity and ductility of shear wall structure at the same time, im-prove the frame of steel fiber reinforced concrete shear walls axial compression ratio is also beneficial to improve the bearing capacity and ductility of shear wa-lls in a certain range.