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劉 康1， 洪嵩然2
(1中國建筑股份有限公司技術中心，北京101300；2中國建筑東北設計研究院有限公司，沈陽110001)[摘要] 根據(jù)《混凝土結構設計規(guī)范》( GB 50010-2010)附錄C建議的鋼筋和混凝土本構關系模型，應用通用有限元軟件ABAQUS提供的VUMAT用戶子程序功能，針對纖維梁單元的單軸材料本構關系模型進行了二次開發(fā)；并結合清華大學公開的兩根鋼筋混凝土獨立柱和一榀鋼筋混凝土框架在往復荷載作用下的推覆試驗數(shù)據(jù)，建立了有限元模型，通過有限元分析和試驗結果的對比，驗證了《混凝土結構設計規(guī)范》附錄C建議的鋼筋、混凝土的本構關系模型和本文的分析方法在結構彈塑性分析應用中的精確性。
[關鍵詞] 混凝土；本構關系；有限元；彈塑性分析
中圖分類號：TU311.41 文獻標識碼：A 文章編號：1002-848X(2012) S2-0181-05Development 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
