考慮累積耗能損傷的鋼框架結(jié)構(gòu)抗震能力分析*
鄭山鎖，孫樂彬，程洋，徐強(qiáng)，韓言召
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（西安建筑科技大學(xué)土木工程學(xué)院， 西安 710055）［摘要］以4個不同層數(shù)的平面鋼框架模型為例，選取14條滿足場地條件的長持時地震波，以基于能量的損傷指標(biāo)為參數(shù)進(jìn)行易損性分析，并對比以層間位移角和頂點位移角為參數(shù)的分析結(jié)果，發(fā)現(xiàn)在長持時地震作用下，必須考慮累積損傷對結(jié)構(gòu)抗震性能的影響?；赑ark-Ang地震損傷模型，提出綜合考慮最大層間位移角和能量損傷指標(biāo)的雙參數(shù)損傷模型?；诘卣鸢踩苑治?，求出不同損傷指標(biāo)的年均超越概率曲線，并對本文設(shè)計的平面鋼框架模型的臨界倒塌層間位移角進(jìn)行折減修正。［關(guān)鍵詞］累積損傷; 鋼框架; 易損性分析; 倒塌儲備系數(shù); 折減修正中圖分類號：TU352 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2015)10-0032-06Seismic capacity analysis for steel frame structures considering cumulative damageZheng Shansuo, Sun Lebin, Cheng Yang, Xu Qiang, Han Yanzhao(School of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China)Abstract:Take four plane steel frame models with different stories for example, 14 seismic waves with long duration that met the site conditions were selected to conduct structural vulnerability analysis based on the damage index of energy. The results of the analyses were compared based on index of inter-story drift angle and roof story drift angle. It shows that the effect of cumulative damage on seismic performance of structures must be taken into consideration if the duration of earthquakes is long. Based on the Park-Ang seismic damage model, a two-parameter damage model that considering both inter-story drift angle and energy-based damage index was put forward. Based on seismic safety analysis, the mean annual rates of exceedance of different damage indexes were obtained and a reduction correction was conducted to critical collapse inter-story drift angle of the plane steel frame designed herein.Keywords:cumulative damage; steel frame; vulnerability analysis; collapse margin ratio; reduction correction*國家自然科學(xué)基金項目（50978218，51108376），國家科技支撐計劃項目(2013BAJ08B03)，長江學(xué)者和創(chuàng)新團(tuán)隊發(fā)展計劃項目，高等學(xué)校博士學(xué)科點專項科研基金項目(20106120110003)，陜西省科研項目(2012K12-03-01，2010JK633，2011KTCQ03-05)。作者簡介：鄭山鎖，教授，博士生導(dǎo)師，Email：zhengshansuo@263.net。參考文獻(xiàn)［1］SHINOZUKA M, FENG M Q, LEE J H, et al. Statistical analysis of fragility curves［J］. Journal of Engineering Mechanics, 2000,126(12): 1224-1231.［2］苗崇剛. 地震災(zāi)害損失評估［J］.自然災(zāi)害學(xué)報，2000,9（1）: 105-110.［3］HANCOCK J, BOMMER J J. A state-of-knowledgereview of the influence of strong-motion duration on structural damage［J］. Earthquake Spectra, 2006, 22(1): 827-845.［4］連業(yè)達(dá)，王憲杰，張洵安. 結(jié)構(gòu)地震累積損傷指標(biāo)研究進(jìn)展［J］. 工業(yè)建筑,2012,42(4):118-122.［5］徐龍河，楊冬玲，李忠獻(xiàn).基于應(yīng)變和比能雙控的鋼結(jié)構(gòu)損傷模型［J］.振動與沖擊,2001,30(7):218-222.［6］BOJRQUEZ E, REYES SALAZAR A, TERN-GILMORE A, et al. Energy-based damage index for steel structures［J］. Steel and Composite Structure, 2010, 10(4):343-360.［7］PARK Y J，ANG A．Mechanistic seismic damage model for reinforced concrete［J］．Journal of Structural Engineering，ASCE, 1985, 111(4):740-756．［8］王丹.鋼框架結(jié)構(gòu)的地震易損性分析及概率風(fēng)險分［D］.哈爾濱：哈爾濱工業(yè)大學(xué),2006.［9］TERAN GILMORE, SIMON A R. Use of constant cumulative ductility spectra for performance-based seismic design of ductile frames［C］//National Conference on Earthquake Engineering. 2006.［10］汪夢甫，汪幟輝，劉飛飛. 增量動力彈塑性分析方法的改進(jìn)及其應(yīng)用 ［J］. 地震工程與工程振動, 2012,32(1):30-35.［11］AKBAS B, SHEN J, HAO H. Energy approach in performance\|based seismic design of steel moment resisting frames for basic safety objective［J］. The Structural Design of Tall Buildings, 2001, 10(3): 193-217.［12］CHOI, HYUNHOON, JINKOO KIM. Energy-based seismic design of buckling-restrained braced frames using hysteretic energy spectrum［J］. Engineering Structures, 2006,28(2): 304-311.［13］SUCUOGLU H, YUCEMEN S, GEZER A, et al. Statistical evaluation of the damage potential of earthquake ground motions［J］. Structural Safety, 1999, 20(4): 357-378.［14］HAZUS 99 user′s manual［M］. Washington D. C.:Federal Emergency Management Agency, 1999.［15］GB/T 17742—2008 中國地震烈度表［S］. 北京: 中國標(biāo)準(zhǔn)出版社, 2008.［16］姚謙峰，蘇三慶．地震工程［M］． 西安: 陜西科學(xué)技術(shù)出版社，2001．［17］楊文俠. Y形偏心支撐鋼框架的結(jié)構(gòu)影響系數(shù)［D］. 上海:上海交通大學(xué),2011．［18］CORNELL C A, JALAYER F, HAMBURGER R O, et al. Probabilistic basis for 2000 SAC federal emergency management agency steel moment frame guidelines［J］. Journal of Structural Engineering, 2002, 128(4):526-533
