考虑波纹管组合钢筋浆锚搭接长度的装配式剪力墙拟静力试验

通过4个剪跨比为1.39、考虑波纹管组合钢筋浆锚搭接长度的装配式混凝土剪力墙试件的拟静力试验,从试验结构试件的承载力、延性和耗能能力等方面,分别研究波纹管内钢筋搭接长度对装配式混凝土剪力墙的抗震性能影响.试验结果表明:4个试件的破坏模式表现基本相同,试件边缘竖向钢筋首先受拉屈服,墙体两侧底部混凝土受压破坏;各试验工况下试验结构试件的承载力试验值高于《高层建筑混凝土结构技术规程》中公式计算值的1.57~1.71倍,延性系数均大于4,弹塑性层间位移角大于1/120.

Quasi-static experiments on lap length of precast shear walls assembled with reinforcement grouting anchor connection and corrugated pipes

Quasi-static experiments are carried out on four precast concrete shear wall specimens with shear span ratio of 1.39, assembled with reinforcement grouting anchor connection and corrugated pipes. The influence of the reinforcement lap length in the corrugated pipes on seismic performance of precast concrete shear walls is studied in the experiments from the aspects of bearing capacity, ductility and energy dissipation capacity of the experiment specimens. The experimental results indicate that the failure modes of the four fabricated wall specimens are basically the same, the vertical reinforcements in the edge of the specimens firstly tensilely yield, and both sides of the concrete are compressive damaged at the bottom of the wall. Under various conditions, the bearing capacities of experiment specimens are 1.57-1.71 times of the calculated value of Technical Specification for Concrete Structures of Tall Building, the ductility coefficients are greater than 4, and the inter-storey displacement angles (ISDA) on elastic-plastic of all the precast specimens are greater than 1/120.