鋼框架焊接節(jié)點地震損傷模型研究
鄭山鎖，韓言召，田進(jìn)，徐強(qiáng)
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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］結(jié)合國內(nèi)外發(fā)表的試驗結(jié)果，綜合考慮加載方式、加載路徑、循環(huán)次數(shù)的影響，并考慮鋼結(jié)構(gòu)試件在循環(huán)荷載作用下剛度和屈服位移隨著循環(huán)次數(shù)的增加不斷降低的影響，提出一種新的雙參數(shù)地震損傷模型來正確評價損傷累積效應(yīng)對結(jié)構(gòu)的影響并準(zhǔn)確預(yù)測結(jié)構(gòu)的破壞形態(tài)。將提出的新的損傷模型及其計算結(jié)果與其他學(xué)者提出的地震損傷模型及有關(guān)文獻(xiàn)提出的損傷指數(shù)抗震設(shè)防目標(biāo)相比較，驗證了新模型的合理性和科學(xué)性，并提出了與新的損傷模型相對應(yīng)的設(shè)防目標(biāo)指數(shù)范圍。［關(guān)鍵詞］地震損傷模型; 鋼框架節(jié)點; 損傷指數(shù); 滯回耗能中圖分類號：TU391 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2014)21-0023-04Study on seismic damage model of steel frame welded connectionsZheng Shansuo, Han Yanzhao, Tian Jin, Xu Qiang(School of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China)Abstract: Combined with the experimental results published at home and abroad, a new form of dual parameter seismic damage model was put forward, which considered the influence of loading mode, loading path and cyclic times. The reduction of yield displacement and the stiffness of steel members along with the increase of cyclic times under the cyclic loading was also considered in this new model to assess the influence of damage accumulation effect on the structure and predict failure patterns of the structure. The proposed model and relevant calculation results were compared with current damage models and damage index seismic fortification goals of relevant literatures so that its rationality and scientifically could be reflected. The fortification goal index range corresponding to the new damage model was put forward.Keywords: seismic damage model; steel frame connection; damage index; hysteretic energy dissipation通訊作者：韓言召，碩士研究生，Email:tiejiang001@sina.com。參考文獻(xiàn)［1］PARK Y J, ANG H S. Mechanistic seismic damage model for reinforced concrete ［J］. Journal of Structural Engineering, 1985, 111 (4): 722-739.［2］WILLIAMS M S, SEXSMITH R G. Seismic damage indices for concrete structures: a state-of-art review ［J］. Earthquake Specta, 1995,11(3):320-349.［3］KUMAR S, USAMI T. A note on evaluation of damage in steel structures under cyclic loading ［J］. Journal of Structural Engineering, 1994,40A: 177-178.［4］CARLO A, RAFFAELE P. Failure criteria and cumulative damage models for steel components under cyclic loading ［J］. Journal of Constructional Steel Research, 2009,65: 751-765.［5］王萌，石永久，施剛，等. 高層鋼框架試件與節(jié)點滯回模型及損傷退化分析［J］. 工業(yè)建筑，2009(IS): 973-981.［6］KUMAR S, USAMI T. Damage evaluation of damage in steel box columns by cyclic loading test ［J］. Journal of Structural Engineering, 1996, 122(6): 626-634.［7］王玉田.梁端翼緣擴(kuò)大型連接鋼框架抗震性能研究［D］.西安：西安建筑科技大學(xué)，2012.［8］董寶，沈祖炎, 孫飛飛. 考慮損傷累積影響的鋼柱空間滯回過程的仿真［J］. 同濟(jì)大學(xué)學(xué)報：自然科學(xué)版，1999, 27(1):11-15.［9］DARWIN D, NMAI C K. Energy dissipation in RC beams under cyclic load ［J］. Journal of Structural Engineering, 1986, 112(8): 1829-1846.
