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伸臂层处剪力墙的受力与变形研究

DOI: 10.13197/j.eeev.2014.05.108.zhouy.015, PP. 108-117

Keywords: 伸臂,框架-核心筒结构,受力层间位移角,屈曲约束支撑,减震层,加强层

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Abstract:

对带伸臂框架-核心筒结构中伸臂层处剪力墙进行受力分析,推导伸臂层处剪力墙受力层间位移角的计算公式,采用PERFORM-3D有限元软件分别对带减震层伸臂和加强层伸臂框架-核心筒结构模型进行非线性动力时程反应分析,研究普通楼层和伸臂层中各竖向构件的剪力分配与变形规律。结果表明伸臂层处剪力墙以剪切变形为主,其受力变形的方向与普通楼层处剪力墙受力变形的方向相反,采用弦转角作为伸臂层处剪力墙的变形性能指标较为合理;伸臂层处剪力墙的受力层间位移角计算公式合理可行,其计算结果与数值分析结果吻合较好;与加强层伸臂相比,设置屈曲约束支撑减震层伸臂既能减小结构的侧向变形,又能合理控制伸臂层处剪力墙的受力变形。

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