【作者】 邓明科； 梁兴文；

【Author】 Mingke Deng~(1,2) Xingwen Liang~1 (1.Post-doctoral center of Civil Engineering,Xi’an University of Architecture and Technology,Shanxi Xi’an,710055, 2.Post-doctoral station of steel structure construction Co.of Xuzhou Zhongmei,Jiangsu Xuzhou,221004)

【机构】 西安建筑科技大学土木工程博士后流动站； 徐州中煤钢结构建设有限公司博士后工作站；

【摘要】 根据剪力墙截面的特点,提出采用分段约束箍筋改善高性能混凝土剪力墙截面的延性,针对剪力墙截面的受力特点和配筋形式,研究了分段约束箍筋对高性能混凝土剪力墙截面延性的影响;提出剪力墙截面屈服曲率和极限曲率的简化计算公式,分析了剪力墙截面相对受压区高度与曲率延性之间的关系,推导了剪力墙截面曲率延性与约束箍筋数量之间的关系。试验结果和算例分析表明,约束箍筋的作用对高性能混凝土剪力墙截面屈服曲率的影响较小,但对极限曲率的影响较大;剪力墙截面的曲率延性与轴压比、分段约束箍筋的数量、约束范围、截面端部约束混凝土的设计参数等因素有关。更多还原

【Abstract】 According to the characteristic of shear wall cross section,a type of new piecewise confining stirrup is adopted to improve the curvature ductility of high performance concrete shear wall.Based on the section property and special configuration of stirrup,the effects of piecewise confining stirrup on the curvature ductility for cross section of high performance concrete shear wall are analyzed and calculation formulas used for evaluating the yielding curvature and ultimate curvature for cross section of shear wall with piecewise confining stirrup are derived.The relationship between the depth of compression zone and curvature ductility is analyzed and the relationship between curvature ductility of shear wall cross section and the amount of confinement reinforcement is derived.Case studies and sample analysis show that the effect of confining stirrup on the ultimate curvature for cross section of shear wall is much more significant than that on the yielding curvature.The curvature ductility for cross section of shear wall is related to the axial compressive ratio,the amount and range of confinement reinforcement,and the design parameters of confined concrete core at the end of section.更多还原