黄吉锋，周锡元
（中国建筑科学研究院，北京 100013）

[摘要] 钢-混凝土混合结构是典型的非比例阻尼结构系统。通过将Rayleigh阻尼理论应用于各个结构单元，建议了一种适合于混合结构计算的非比例阻尼系统模型，并以此为基础在PMSAP软件中实现了用于非比例阻尼结构地震反应分析的CCQC方法和强迫解耦OQC方法(FDCQC)。通过对若干典型算例的地震反应分析计算，检验了FDCQC方法在钢-混凝土混合结构地震反应分析中的精度。结果表明，该非比例阻尼系统模型比较合理。FDOQC方法在钢-混凝土混合结构地震反应分析中的计算结果与比较精细的CCQC方法结果相当接近，误差一般不超过5%，可以满足工程要求。
[关键词] 钢-混凝土混合结构；非比例阻尼系统；CCQC方法；强迫解耦OQC方法；地震反应

CCQC and forced decoupling CQC method for earthquake response  analysis of hybrid structure composed of steel and concrete
    Huang Jifeng,Zhou Xyuan
    (China Academy of Building Research, Beijing 100013, China)

Abstract:  Applying the Rayleigh damping theory onto individual members of the structure, it proposes a kind of damping model to handle the gobal non-proportional damping peculiarity of hybrid structure composed of steel and concrete. Based on the proposed damping model, the COQC (Complex Complete Quadratic Combination) method and FDOQC (the forced decoupling CQC) method, which are two approaches that can be adopted in the earthquake response analysis of non-proportionally damped structure, are implemented in the PMSAP. Then, through computation and comparison for several typical example structures, the accuracy of FDCQC method in the earthquake response analysis of steel-concrete hybrid structure is verified. The results show that the non-proportional damping model proposed is reasonable and the computational results from the FDOQC method are very close to those from the COQC method, a more delicate algprithm, and the relative error of FDOQC metbod is generally less than 5 percents compared to COQC method. Hence, FDOQC method can be used as an effective tool in the earthquake response analysis of hybrid structure composed of steel and concrete.
Keywords: steel-concrete hybrid structure; non-proportionally damped structure; COQC method; forced decoupling OQC method; earthquake response