884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

（天津大學(xué)建筑工程學(xué)院，天津 300072）

[摘要] 本文通過(guò)混凝土的單軸重復(fù)加卸載應(yīng)力應(yīng)變曲線對(duì)混凝土的剛度退化現(xiàn)象進(jìn)行解釋并對(duì)幾種混凝土損傷塑性模型進(jìn)行了比較分析，在此基礎(chǔ)上為混凝土損傷塑性模型提出了修正的損傷因子計(jì)算原理。使用ABAQUS有限元軟件采用包括本文提出的修正模型在內(nèi)的三種混凝土損傷塑性模型對(duì)往復(fù)荷載作用下鋼筋混凝土梁柱節(jié)點(diǎn)進(jìn)行非線性分析，與實(shí)驗(yàn)結(jié)果對(duì)比分析驗(yàn)證了修正混凝土損傷塑性模型的有效性。

[關(guān)鍵詞] 混凝土損傷塑性；剛度退化；非線性分析；有效性驗(yàn)證

中圖分類(lèi)號(hào)：TU528.1      文獻(xiàn)標(biāo)識(shí)碼：A

Modified damage factor for concrete damaged plasticity model and its validation verification

He Xiaoyong，Liu Jie

(Building Engineering School of Tianjin University, Tianjin 300072, China)

Abstract：Based on the stress-strain curve for concrete under cyclic uniaxial loading, this article made an clear explanation of stiffness degradation of concrete and summarized four types of classic models of concrete damage factor and at last put forward an analysis principle of modified damage factor for concrete damaged plasticity. Finally, this article made nonlinear analysis of reinforced concrete beam-column joint under reciprocating load by adopting three types of damage factor of concrete damaged plasticity model including the modified one in ABAQUS. The validation of modified damage factor was verified by comparison with other classic models and experimental data.

Keywords：concrete damaged plasticity；stiffness degradation；nonlinear analysis；validation verification

參 考 文 獻(xiàn)

[1]李兆霞. 損傷力學(xué)及其應(yīng)用[M].北京:科學(xué)出版社,2002.

[2] K.E. LøLAND.       Continuous damage model for load-response estimation of concrete [J].Cement and Concrete Research, 1980, 10(3):395-402.

[3] MAZARS, J. A description of micro and macro-scale damage of concrete structures [J]. Engineering Fracture Mechanics, 1986, 25(5):729-737.

[4] SIDOROFF, F. Description of anisotropic damage application to elasticity [M]. Springer Berlin Heidelberg, 1981:237-244.

[5] DUSAN KRAJCINOVIC, MANUEL AMERICO G. SILVA. Statistical aspects of the continuous damage theory[J].    International Journal of Solid sand Structures, 1982, 18(7):551-562 

[6] MAZARS, J. PIJAUDIER-CABOT, G. Continuum damage theory-application to concrete [J].Journal of Engineering Mechanics, 1989, 15(2):345-365.

[7] JIRSA, I.K., KARSAN, J.O. Behavior of concrete under          compressive loadings [J]. Journal of the Structural Division,           1969, 95(12):2543-2563.

[8] 曹明. ABAQUS損傷塑性模型損傷因子計(jì)算方法研究[J]. 交通標(biāo)準(zhǔn)化,2012,02:51-54.

[9] 王中強(qiáng),余志武. 基于能量損失的混凝土損傷模型[J]. 建筑材料學(xué)報(bào),2004（4）:365-369.

[10] 龍渝川,李正良. 基于能量耗散機(jī)制的混凝土受壓損傷模型[J]. 工程力學(xué),2010（S2）:171-177.

[11] Dassault Systèmes Simulia Corp. Abaqus version6.11, Analysis user’s manual [M].2011.

[12] 陸新征,葉列平,潘鵬,等.鋼筋混凝土框架結(jié)構(gòu)擬靜力倒塌試驗(yàn)研究及數(shù)值模擬競(jìng)賽Ⅱ:關(guān)鍵構(gòu)件試驗(yàn)[J].建筑結(jié)構(gòu),2012,42(11):23-26.