The Experimental Study On Seismic Performance Of T-Shaped Steel Reinforced Concrete Short Leg Shear Wall By The Non-Engineering Axis Force

Due to the randomness of earthquake vibrations, short-leg shear wall structure is usually in a state of complex spatial force. Currently, the domestic and international research on the seismic performance of a short shear leg by the non-engineered axis force is basically vacant. In this paper, the seismic performance of T-shape short leg shear wall by the non-engineered axis force is closely studied. This paper focus on studying its failure mechanism by the non-engineered axis force, analyzing the seismic performance index of the specimen, including intensity, stiffness, ductility and energy dissipation, and therefore getting the axial compression ratio, shear span ratio, load angle, and reinforcement in the form for its seismic performance.This paper is carried out from the following perspectives:Five "T" shaped steel reinforced concrete short-leg shear wall specimens was designed and produced. One of them was in-plane stress state, and another four were in non engineering axial stress state. By adopting cyclic loading test method, the specimens of P-Δ hysteresis curve were measured, the ductility factor of the specimen, the equivalent sticky damping coefficients, and bearing capacity reduction factor and other indicators were calculated. The following aspects were analysed:the impact of axial compression ratio, shear span ratio, load angle, reinforcement in the form for its failure modes,the bearing capacity and seismic performance.Experimental results show that:(1) The bearing capacity of the positive and negative, positive and negative stiffiiess, positive and negative ductility of SRC T-shaped short leg shear wall structure exist asymmetry, the deterioration of the positive and negative bearing capacity and stiffness are different.(2) When the load along non-engineering axis, the high shear span ratio test specimen has a good energy dissipation capacity, the dark column of flange and web Corner portion reinforcement with a reasonable form can increase the energy capacity of the specimen..(3) The main factor affecting the specimen failure mode is shear span ratio. When the shear span ratio is moderate, the web of specimen is easy to encounter shear bending failure; when shear span ratio is large, the specimen web is prone to bending failure; when in the non engineering axial loading and the shear span ratio is moderate, the flange of specimen prone to bending failure.(4) This research paper has also incorporated norms, the formulas of T-shaped cross-section of steel reinforced concrete short leg shear normal section bearing capacity and shear capability were derived, and analyzed and is compared with the experimental values.(5) When the load along non-engineering axis, the steel of flanges and web junction plays a key influence on the performance of the specimen, and the steel of flange ends cannot remedy its role. In the actual design, we recommend that the site should be strengthened with steel, and appropriatly increasing the stirrup rate of dark column, when the volume stirrup ratio of 3.77 percent,the specimens take good effect, suggesting practical engineering volume stirrup ratio not less than 4%.(6) There should consider the strength of the flange end of the principle of balance,legitimately design dark column of web without flange.