首页> 中文期刊> 《沈阳建筑大学学报(自然科学版)》 >轴压比取值对考虑波纹管组合钢筋浆锚连接预制剪力墙抗剪性能的影响

轴压比取值对考虑波纹管组合钢筋浆锚连接预制剪力墙抗剪性能的影响

         

摘要

In order to study the shear behavior under the low cycle loading of the prefabricated concrete shear wall assembled with grouting anchor connection and corrugated pipes,the quasi-static experiment of the four shear walls were carried out.The failure modes,bearing capacity,ductility and energy dissipation capacity of the shear wall were analyzed in the design axial pressure ratio of 0.2 and 0.4.The hysteresis curve and skeleton curve of the relationship between load and displacement were obtained.The results show that the failure modes of the four specimens are mainly expressed by vertical reinforcement yielded and concrete damaged in the both edges of shear wall.The hysteresis curves are full and the skeleton curves are basically the same.The beating capacity of the shear wall specimen with the axial compression ratio of 0.4 is 25 % higher than that of the axial compression ratio of 0.2,and the ductility coefficient is more than 4,the elastic-plastic interlayer displacement angles(ISDA) of the prefabricated specimens are more than 1 /120.The internal reinforcement assembled with grouting anchor connection is still guaranteed to be reliable and the energy absorption and consumption is being increased with the larger design axial compression ratio of the wall.%目的 研究考虑波纹管组合、钢筋约束浆锚连接的预制混凝土剪力墙在低周期反复荷载作用下的抗剪性能.方法 通过4片剪力墙构件的拟静力试验,在设计轴压比取值分别为0.2和0.4的试验工况下对剪力墙的破坏模式、承载力、延性和耗能能力等方面进行分析,得到了荷载与位移关系的滞回曲线和骨架曲线.结果 4个试件的破坏模式主要表现为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;各试件滞回曲线饱满,骨架曲线也基本一致,采用0.4轴压比的剪力墙试件承载力比轴压比为0.2的试件提高了25%,延性系数均大于4,预制剪力墙试件的弹塑性层间位移角大于1/120.结论 预制墙体的设计轴压比取值较大者,其内部浆锚钢筋连接仍然保证可靠,在地震作用下墙体的吸能与耗能能力越大.

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