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高强螺旋钢筋约束高强混凝土剪力墙抗震性能研究 被引量:7

Experimental study on seismic behavior of high-strength concrete shear walls confined with high-strength spiral reinforcements
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摘要 为改善高强混凝土剪力墙的变形能力,在剪力墙约束边缘构件内采用高强矩形螺旋箍筋替代传统箍筋,在墙体中采用高强矩形螺旋钢筋替代水平分布筋,设计了5个不同参数的高强螺旋钢筋约束高强混凝土剪力墙试件和1个普通钢筋混凝土剪力墙对比试件,对其进行拟静力试验。研究了轴压比、配箍特征值、配箍形式以及平均约束应力等因素对剪力墙承载力、延性和破坏形态的影响。结果表明:采用高强矩形螺旋钢筋嵌套形成的箍筋和水平分布筋,能够有效地约束高强混凝土的横向变形,提高高强混凝土剪力墙的承载力和延性,降低刚度和承载力退化,显著改善高轴压比下高强混凝土剪力墙的抗震性能。 In order to improve the deformation capacity of high-strength concrete shear walls, five high-strength concrete shear walls confined with high-strength spiral reinforcements of different parameters and a normal shaped reinforced concrete shear wall were designed to conduct the quasi-static test. Traditional stirrups for confining boundary members of the shear walls were substituted with high-strength spiral stirrups. The horizontal distribution bars in the wall body were also replaced by high-strength spiral reinforcement replacement. The influences of axial compression ratio, stirrup characteristic value, stirrup configuration and the average confining stress on bearing strength, ductility, and failure mode of the shear walls were studied. The results show that stirrups and horizontal distribution bars formed by nested high strength spiral reinforcement can effectively confine high-strength transverse deformation of concrete, enhance bearing capacity and ductility of the high-strength concrete shear walls, reduce stiffness and strength degradation, and significantly improve the seismic performance of high-strength concrete shear walls under high axial compression ratios.
作者 赵花静 李青宁 姜维山 张兴虎 ZHAO Huajing, LI Qingning, JIANG Weishan, ZHANG Xinghu(Key Laboratory of Structure Engineering and Earthquake Resistance of China Ministry of Education, Xi' an University of Architecture and Technology, Xi' an 710055, Chin)
出处 《建筑结构学报》 EI CAS CSCD 北大核心 2018年第4期54-64,共11页 Journal of Building Structures
基金 国家自然科学基金项目(51278402) 西安建筑科技大学青年科技基金项目(QN1635)
关键词 高强混凝土剪力墙 高强矩形螺旋钢筋 拟静力试验 抗震性能 high-strength concrete shear wall high-strength rectangular spiral steel bar quasi-static test seismic behavior
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