双重耗能智能框架摇摆墙结构地震响应对比分析

针对框架剪力墙结构在强震作用下存在连接处楼板或连梁破坏以及剪力墙底部出现塑性铰的问题,在课题组开发的智能框架剪力墙双重结构体系中,将剪力墙设置为底部连接金属阻尼器的摇摆剪力墙,形成一种新型双重耗能单元控制的智能框架摇摆墙结构体系.以6层混凝土框架剪力墙结构为原型,应用ABAQUS有限元分析软件,建立传统框架剪力墙结构、智能框架剪力墙双重结构、摇摆墙与框架间连接BRB结构和摇摆墙底部连接金属阻尼器的双重耗能智能框架摇摆墙4种结构对比模型,进行非线性动力时程分析,考察各结构的动力响应.结果表明:新型双重耗能单元控制的智能框架摇摆墙结构体系在BRB屈服强度为0.1f_y~1f_y区间时,结构地震响应均比传统结构有所减小,框架结构层间位移也得到有效控制,进一步说明在合理参数取值下双重耗能单元控制的结构地震动响应小于单一耗能单元结构.

Comparative analysis of seismic response of smart frame-rocking wall structure with dual energy dissipation elements

Directed against the issues of frame-shear wall structure floor diaphragm were damaged or coupling beam failed, and the plastic hinges appeared at the bottom of shear wall under strong earthquake, a smart frame-shear wall dual structure system with BRB passive energy dissipation in between the frame and shear-wall was developed by the author's research group, and the shear wall is set as the rocking shear wall with metal damper at the bottom. A new frame-rocking shear wall structure system with dual energy dissipation elements is set up. In this paper, a six-story reinforced concrete frame-shear wall model are established using ABAQUS as prototype, the traditional frame-shear wall structure, the smart frame-shear wall dual structure, the frame-rocking wall structure with BRB in between rocking wall and frame, and the frame-rocking shear wall structure system with dual energy dissipation elements are compared. To obtain dynamic response of each structure, the non-linear dynamic time-history analysis is conducted. Results show that when the BRB yield strength ratio is 0.1~1, the seismic responses of the frame-rocking shear wall structure with dual energy dissipation elements are less than that of traditional structure. The frame inter-storey drift is also effectively controlled. It is further explained that, under the appropriate parameter value of the BRB and MD, the seismic response of the structure with dual energy dissipation elements is smaller than that of the single energy dissipation element.