Research On Mechanical Performance Of SRC T-shaped Short-limb Shear Walls

With the faster development of urbanization in our country, more and more high-riseresidential buildings appear and people demand for plane and space of residential buildingsmore and more high. As a new structural form, steel reinforced concrete T-shaped crosssection short-limb shear wall has broad prospect in engineering application because of itsplane easy to decorate and mechanical performance superior to characteristics of commonshort-limb shear wall. However, at present domestic research on mechanical performance ofthe new structural form performance is less, and theoretical research lags behind engineeringpractice, so research on its mechanical performance is of important theoretical significanceand engineering application value.In this paper, the solid modeling method and numerical simulation were carried out toanalyze steel reinforced concrete T-shaped short-limb shear wall by using ANSYS software.Consider the influence factors of the concrete strength grade，high-thickness ratio and axialcompression ratio of wall limb section to mechanical performance of the member. A total of13finite element models were established, and studied the ductility，bearing capacity and thesynergy of steel and concrete for members under monotone horizontal load and studiedhysteresis curves, skeleton curves, stiffness degradation curves of the member under cyclicload, analyzed plastic equivalent stress and strain of shear walls and stress distribution of thesteel and concrete under various loads. As results showing, bearing capacity is higher whenthe flange of the member is in compressive than that when the flange of the member is intension under monotone horizontal load, but the ductility is less when the flange of themember is in compressive than that when the flange of the member is in tension; Should weldstud on the steel flange and web about a third height range from the bottom of the shear wallto prevent slip between concrete and steel；Appropriate for1/2way up the brick wall at the bottom of the range of pitch components of web plate shear wall to strengthen structuredesign.And measures should be taken to reduce the negative impact of the phenomenon ofstress concentration at the intersections of web plate shear walls and flange shear walls. Theconcrete strength grade and the high-thickness ratio have a significant impact on mechanicalperformance of the member; Research results show that concrete strength grade andhigh-thickness ratio should not be too high or too low in the design, and high-thickness ratioshould not be more than6.0. The influence of axial compression ratio on bearing capacity ofmembers is not as important as the concrete strength grade and high-thickness ratio; Theinfluence of the changing of axial compression ratio on bearing capacity of member was notobvious, but influence on ductility of members is great, advice the axial compression ratioselected properly0.2~0.5in structural seismic design.This paper analyzes in depth the mechanical performance of the steel reinforced concreteT-shaped short-limb shear wall under monotone horizontal load and cycle load.Theconclusion of this article has certain reference value to theoretical research and engineeringapplication on short-limb shear walls with steel reinforced concrete T-shaped cross section,and lay a good foundation for further study.