The Research Of Stiffness Degradation Of Short-limb Shear Wall Structure Under High Temperature Condition

In recent years, China engineers originated a new type of anti-lateral force structural system which is called reinforced concrete short-limb shear wall structure (SLW). It has been widely used in high-rise residential buildings. However, compared with the normal shear wall structure, the SLW system show worse seismic performance and has little experience in earthquake zone. Related theory is far behind of the frame structure and the normal wall structure. So, it's postponed the SLW practical application. Secondary disasters such as fires are easily generated after earthquake and fire can leads to high temperature. It weakens the SLW's properties of all aspects greatly. In addition, stiffness deterioration would reduce their performance of anti-seismic. Therefore, research degradation of structural stiffness under high temperature condition is important.This thesis use of general finite element analysis software ANSYS for monotonic loading of the nonlinear finite element simulation and analysis about reduced scale single-storey SLW under normal and high temperature environment. Contrasted on whether the wing wall and the thickness of different limbs and axial compression ratio than the specimen failure modes, such as carrying capacity of a comparative study, the structure derived from the load - displacement curve and the experimental results have been consistent. And then study of the short-limb shear wall structure stiffness degradation under normal and high temperature, obtained stiffness degradation coefficient change curve with the model's displacement angle. The analysis shows that the SLW's capacity, lateral stiffness had decreased after high levels of temperature. The degree of stiffness degradation enlarged with the environment temperature increases. Explain that high temperature environment had a negative impact on the performance of various aspects of the structure. In practical engineering structures should pay attention to fire, heat and other issues.