- 摘 要
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（長安大學建筑工程學院， 西安 710061）
［摘要］考察了金屬材料延性損傷準則在大型鋼框架結構強震作用下損傷評估分析中的應用效果。利用有限元軟件ABAQUS分別將延性損傷準則引入到一座4層及一座18層鋼框架結構的動力時程分析中，考察了材料損傷累積效應對框架結構整體抗震性能及倒塌機制的影響。同時還利用損傷準則對框架結構的損傷部位與發(fā)展程度進行了預測。研究結果表明，材料損傷累積對多高層鋼框架結構的抗震性能有重要的影響。延性損傷準則的使用可以正確地模擬多高層鋼框架結構的倒塌機制，并可以準確地預測鋼框架結構在強震中的破壞部位與損傷程度。提出的方法可以為預測鋼框架結構的薄弱部位、震后評估及優(yōu)化設計提供方法。
［關鍵詞］鋼框架； 延性損傷準則； 應力三軸度； 強震作用； 倒塌分析
中圖分類號：TU391文獻標識碼：A文章編號：1002-848X(2018)22-0021-07
Application of ductile damage criterion in dynamic time history analysis of steel frame structures
Li Wenchao, Zhou Tianhua, Liao Fangfang, Lu Yan
(School of Civil Engineering, Chang′an University, Xi′an 710061, China)
Abstract:The reliability of the ductile metallic damage criterion in assessing the failure condition of large-scale steel frame structure under strong earthquake was investigated. A ductile damage criterion was introduced in the dynamic history analysis of a 4-story and 18-story steel frame system using the software ABAQUS, respectively. The effect of damage accumulation of the material on the collapse mechanism of the frame structures was studied. Meanwhile, the damage location and degree of the frame system were predicted by using the damage criterion. The analysis results show that the damage accumulation of the steel has an important influence on the overall seismic behavior of the steel frame structures. The use of the ductile damage criterion can successfully simulate the collapse mechanism and predict the failure location and degree of the frame structures. The ductile damage criterion proposed can be used as an effective method for weak zone determination, seismic assessment and optimization design.
Keywords:steel frame; ductile damage criterion; stress triaxiality; strong earthquake; collapse analysis
*國家自然科學基金項目（51408055），中央高?；究蒲袠I(yè)務費資助項目（300102288105）。
作者簡介：李文超，博士，講師，Email:liwenchao0471@126.com。
