中文摘要：

多重抗侧力钢．混凝土混合结构是通过楼板将半刚性连接钢框架、屈曲约束支撑钢框架和混凝土芯筒连接起来协同工作的多重抗力体系．在工程设计中，三者的刚度比关系对结构整体的安全性有着重要的影响．根据简化力学模型设计了3组18个弹性抗侧刚度相同的多重抗侧力钢一混凝土混合结构．通过罕遇地震作用下的弹塑性时程分析，研究了结构最大层间侧移与框架、支撑和剪力墙三者刚度比之间的关系；根据改进的Park—Ang损伤模型对剪力墙底层进行震后量化损伤评估，研究其损伤程度与刚度比之间的关系；基于最大层间侧移和底层剪力墙损伤程度双重指标，提出了这种新结构体系的最优刚度比设计建议．

英文摘要：

Multi-lateral resistant steel-concrete mixed structure is composed of semi-rigid connection steel frame, buckling restrained braces steel frame and concrete core tube through the floor. In engineering design, stiffness ratios are important for the comfort level of the overall structure, the use of functional requirements and security. According to a simplified mechanical model of multi-lateral resistant steel-concrete mixed structure, there are 18 multi-lateral resistant steel-concrete mixed structures designed, which are divided into 3 groups with the same elastic lateral stiffness. Through the elastic-plastic time history analysis under the action of the rare earthquake, the relationships between the maximum layer lateral displacement and the stiffness ratios of the frame, brace and core tube are studied. Shear wall at the bottom was evaluated based on the new modified Park-Ang damage model. The relationships between damage degree and stiffness ratios are studied. The design factors of best stiffness ratios are suggested according to the study of the maximum layer lateral displacement and the damage degree of the bottom shear wall.