钢筋混凝土框架核心筒结构层间耗能分布研究

发布时间：2018-05-13 01:44

本文选题：钢筋混凝土框架核心筒 + 能量反应　；参考：《工程力学》2014年05期

【摘要】：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。
[Abstract]:In this paper, five reinforced concrete frame-core tube structures with different structural characteristics are analyzed by using a certain number of seismic waves. The relationship between hysteretic energy dissipation and structural dynamic characteristics and ground motion parameters, and the distribution of hysteretic energy between members and layers are studied. The results show that the ratio of the natural period to the dominant period of seismic wave and the amplitude of the acceleration of the ground motion have great influence on the hysteretic energy dissipation of the structure, and the stiffness characteristic value affects the distribution of the hysteretic energy between the outer frame and the inner cylinder. The linear stiffness ratio of the connecting beam and shear wall in the inner core tube is linearly related to the distribution ratio of energy consumption between them, and the hysteretic energy dissipation of the structure is mainly concentrated at the bottom shear wall and the middle connecting beam. By means of parameter analysis and regression fitting, a simplified formula for calculating the distribution of hysteretic energy dissipation layer is obtained, which can reflect the eigenvalue of structure stiffness, the ratio of linear stiffness of connecting beam to shear wall, and the period of structure.
【作者单位】：西安建筑科技大学土木工程学院;东营市城乡规划局;
【基金】：国家自然科学基金项目(50978215,51108370)
【分类号】：TU973.17

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