- 摘 要
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黃吉鋒，周錫元
（中國建筑科學(xué)研究院，北京 100013）[摘要] 鋼-混凝土混合結(jié)構(gòu)是典型的非比例阻尼結(jié)構(gòu)系統(tǒng)。通過將Rayleigh阻尼理論應(yīng)用于各個結(jié)構(gòu)單元，建議了一種適合于混合結(jié)構(gòu)計算的非比例阻尼系統(tǒng)模型，并以此為基礎(chǔ)在PMSAP軟件中實(shí)現(xiàn)了用于非比例阻尼結(jié)構(gòu)地震反應(yīng)分析的CCQC方法和強(qiáng)迫解耦OQC方法(FDCQC)。通過對若干典型算例的地震反應(yīng)分析計算，檢驗(yàn)了FDCQC方法在鋼-混凝土混合結(jié)構(gòu)地震反應(yīng)分析中的精度。結(jié)果表明，該非比例阻尼系統(tǒng)模型比較合理。FDOQC方法在鋼-混凝土混合結(jié)構(gòu)地震反應(yīng)分析中的計算結(jié)果與比較精細(xì)的CCQC方法結(jié)果相當(dāng)接近，誤差一般不超過5%，可以滿足工程要求。
[關(guān)鍵詞] 鋼-混凝土混合結(jié)構(gòu)；非比例阻尼系統(tǒng)；CCQC方法；強(qiáng)迫解耦OQC方法；地震反應(yīng)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
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