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劉  康1，  洪嵩然2
(1中國(guó)建筑股份有限公司技術(shù)中心，北京101300；2中國(guó)建筑東北設(shè)計(jì)研究院有限公司，沈陽(yáng)110001)

[摘要] 根據(jù)《混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》( GB 50010-2010)附錄C建議的鋼筋和混凝土本構(gòu)關(guān)系模型，應(yīng)用通用有限元軟件ABAQUS提供的VUMAT用戶子程序功能，針對(duì)纖維梁?jiǎn)卧膯屋S材料本構(gòu)關(guān)系模型進(jìn)行了二次開(kāi)發(fā)；并結(jié)合清華大學(xué)公開(kāi)的兩根鋼筋混凝土獨(dú)立柱和一榀鋼筋混凝土框架在往復(fù)荷載作用下的推覆試驗(yàn)數(shù)據(jù)，建立了有限元模型，通過(guò)有限元分析和試驗(yàn)結(jié)果的對(duì)比，驗(yàn)證了《混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》附錄C建議的鋼筋、混凝土的本構(gòu)關(guān)系模型和本文的分析方法在結(jié)構(gòu)彈塑性分析應(yīng)用中的精確性。
[關(guān)鍵詞] 混凝土；本構(gòu)關(guān)系；有限元；彈塑性分析
中圖分類(lèi)號(hào)：TU311.41    文獻(xiàn)標(biāo)識(shí)碼：A  文章編號(hào)：1002-848X(2012) S2-0181-05

Development and application of constitutive relations for steel and concrete recommended by Code for design of concrete structures-appendix C in elastic-plastic analysis of structures
 Liu Kang1, Hong Songran2
(1 China State Construction Engineering Corp.  Ltd. Technical Center, Beijing 101300, China; 2 China Northeast Architectural Design Research Institute Co.,  Ltd.,  Shenyang 110001,  China)

Abstract: Using constitutive relations for steel and concrete recommended by Code for design of concrete structures( GB 50010-2010)-appendix C, the author developed a user-defined material subroutine for fiber beam elements that is incorporated in subprogram VUMAT provided by ABAQUS.  FE models for numerical simulation of two single RC columns and one RC frame structure under cyclical pull-down loading conducted at Tsinghua University were developed. Comparisons between FEM results and test data indicated that constitutive relations for steel and concrete recommended by Code for design of concrete structures-appendix C combined with the analysis method developed can possess good accuracy in elastic-plastic analysis of structures.
Keywords: concrete; constitutive relation; FEM; elastic-plastic analysis