- 摘 要
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(1 蘭州理工大學(xué)甘肅省土木工程防災(zāi)減災(zāi)重點實驗室, 蘭州 730050; 2 蘭州理工大學(xué)防震減災(zāi)研究所, 蘭州 730050)
［摘要］依據(jù)我國《建筑抗震設(shè)計規(guī)范》（GB 50011—2010）和借鑒日本隔震結(jié)構(gòu)協(xié)會《被動減震結(jié)構(gòu)設(shè)計·施工手冊》，提出了非線性黏滯阻尼器減震結(jié)構(gòu)的設(shè)計方法，通過實際結(jié)構(gòu)的等效單自由度體系的減震性能曲線，確定非線性黏滯阻尼器的損失剛度比和等效支撐構(gòu)件剛度比，進而應(yīng)用于主結(jié)構(gòu)，確定各樓層需配置的非線性黏滯阻尼器參數(shù)。利用這一方法對某6層鋼筋混凝土框架結(jié)構(gòu)進行減震設(shè)計，并采用SAP2000軟件對結(jié)構(gòu)裝設(shè)阻尼器前后的抗震性能進行了分析對比。最后選擇20條地震波對結(jié)構(gòu)某榀橫向中框架進行了增量動力分析，并采用倒塌儲備系數(shù)評估結(jié)構(gòu)的抗倒塌能力。結(jié)果表明：裝設(shè)非線性黏滯阻尼器后結(jié)構(gòu)的抗震性能有較大的改善，能夠較好地達到性能目標的要求；結(jié)構(gòu)的抗倒塌能力也明顯提高。但不同地震動輸入下結(jié)構(gòu)的增量動力分析結(jié)果差別較大，因此地震波的合理選擇及大震作用下動力分析結(jié)果的可靠性仍然是今后需進一步研究的主要問題。
［關(guān)鍵詞］非線性黏滯阻尼器; 減震性能曲線; 位移降低率; 剪力降低率; 增量動力分析; 抗倒塌能力
中圖分類號：TU352.1 文獻標識碼：A 文章編號：1002-848X(2014)04-0063-06
Performance-based seismic design and collapse resistance capacity evaluation for energy dissipation structures with nonlinear viscous dampers
Han Jianping1, 2, Chen Jun 2, Zou Xinlei 2
(1 Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province,
Lanzhou University of Technology, Lanzhou 730050, China; 2 Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology, Lanzhou 730050, China)
Abstract: Design method for energy dissipation structures with nonlinear viscous dampers was proposed based on Code for seismic design of buildings (GB 50011-2010) and Design and construction manual for passively controlled buildings by Japan Society of Seismic Isolation Structure. Loss stiffness ratio of nonlinear viscous dampers and stiffness ratio of equivalent supporting components were determined based on the energy dissipation performance curve of equivalent single degree of freedom system of the actual structure and the results were applied in the main structure to determine parameters of viscous dampers on each floor. Then, a 6-storey reinforced concrete frame structure with nonlinear viscous dampers was designed by above method. SAP2000 was used to compare the seismic performances of structures with and without dampers. Finally, 20 ground motion records were chosen for increment dynamic analysis (IDA) on one of the transverse frames in this structure and collapse resistance capacity was evaluated in terms of collapse margin ratio (CMR). The results show that the seismic performance of the structure with dampers is greatly improved and the performance objectives are achieved. In addition, the collapse resistance capacity is improved effectively. Record-to-record variation is obvious in the results from IDA with different ground motion inputs, so it is still imperative to study reasonable selection of ground motion records and to analyze the dynamic response reliably under the rare earthquake in future.
Keywords: nonlinear viscous damper; energy dissipation performance curve; displacement reduction rate; shear reduction rate; incremental dynamic analysis; collapse resistance capacity
*甘肅省高?；究蒲袠I(yè)務(wù)費項目資助(0904ZTB152)。
作者簡介：韓建平，博士，教授，博士生導(dǎo)師，Email：jphan@lut.cn。
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