Study on the Deterioration Law of Sleeve Grouting Defects on the Lateral Bearing Capacity of Assembled Shear Walls

Abstract

AbstractSleeve grouting defects in assembled buildings leave a major safety hazard for building safety. Assembled shear walls are the most widely used key lateral force resisting element in assembled buildings and their lateral bearing capacity is critical to the safety of the building. However, the deterioration pattern of the defects on the lateral bearing capacity of assembled shear walls is still unclear, which makes it impossible to make an accurate assessment of the performance of defective assembled shear walls and thus to develop reasonable reinforcement solutions. In order to be able to accurately predict the lateral bearing capacity of defective assembled shear walls. A non-linear finite element model of the defective assembled shear wall structure was developed using the finite element software ABAQUS and compared with tests to verify the correctness of the model. Subsequently, the influence of the defects distribution and the defect rate on the ultimate lateral bearing capacity of shear walls was investigated. The results show that defects concentrated on one side of the wall are more harmful than uniformly dispersed defects, and the degree of deterioration effect of individual defects decreases as the number of defects in the same part increases. Finally, the deterioration coefficient, which reflects the degree of deterioration of defects on the lateral load bearing capacity of shear walls, is obtained, and can be used to calculate the lateral bearing capacity of assembled shear walls with defects, providing a reference basis for the performance assessment of assembled buildings. KeywordsAssembled shear wallGrouting defectFinite element modelLateral bearing capacityDeterioration coefficient