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工程力学  2014 

钢筋混凝土框架核心筒结构层间耗能分布研究

DOI: 10.6052/j.issn.1000-4750.2012.12.0951, PP. 190-196

Keywords: 钢筋混凝土框架核心筒,能量反应,滞回耗能,结构特性,简化公式

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Abstract:

该文通过对5个不同结构特性的钢筋混凝土框架-核心筒结构,选用一定数量的地震波进行时程分析,研究了此类结构在水平地震作用下的滞回耗能与结构动力特性以及地震动参数的关系,以及滞回耗能在构件及层间的分布规律。研究表明:结构自振周期与地震波卓越周期比和地震动加速度幅值对结构滞回耗能影响较大,刚度特征值影响外框架与内筒之间滞回耗能分配,内核心筒中连梁和剪力墙的线刚度比与两者之间耗能分配比例呈线性关系;结构滞回耗能主要集中于底层剪力墙和中部连梁处。通过参数分析及回归拟合的方法得到能够反映结构刚度特征值、连梁与剪力墙线刚度比和结构周期等因素的滞回耗能层间分布规律的简化计算公式。

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