混凝土梁柱構(gòu)件基于截面纖維模型的彈塑性分析
李承銘1)，2) 李志山3) 王國儉2)
- 摘 要
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［提要］ 采用了彈塑性纖維單元模擬鋼筋混凝土梁、柱桿件，通過材料應(yīng)力應(yīng)變本構(gòu)關(guān)系對截面動態(tài)積分，直接得到構(gòu)件剛度及恢復(fù)力特性，提出了適用于該模型的計算方法和相應(yīng)的鋼筋和混凝土材料單軸應(yīng)力應(yīng)變本構(gòu)關(guān)系。并應(yīng)用通用有限元軟件ABAQUS對鋼筋混凝土懸臂柱及鋼筋混凝土框架進行了擬動力反復(fù)加載計算，并與試驗結(jié)果進行對比分析。［關(guān)鍵詞］ 彈塑性 截面纖維模型 材料本構(gòu)模型 ABAQUSStudy on Elasticplastic Finite Element Analysis Based on Section Fiber Beamcolumn Elements/Li Chengming1，2, Li Zhishan3, Wang Guojian2(1 Civil Engineering College of Tongji Uni., Shanghai 200092, China; 2 Shanghai Xiandai Architectural Design (Group) Co., Ltd., Shanghai 200442, China; 3 SCL Consultants Pty Ltd., Guangzhou 510170, China)Abstract:The elastic-plastic fiber model has been used to simulate beam and column. Dynamic integral was carried out from material stress-strain constitutive relation. Frame rigidity and restoring forces properties were obtained directly. Computational methodology suitable for the fiber model and uniaxial stress-strain relation of reinforcement and concrete are presented. FEM software of ABAQUS was used to calculate the pseudo dynamic cyclic loads on concrete cantilever column and frame, and comparative analysis with test results was done.Keywords:elastic-plastic; section fiber model; material constitutive model; ABAQUS1) 同濟大學土木工程學院，上海，200092；2)上海現(xiàn)代建筑設(shè)計(集團)有限公司，200442；3)廣州數(shù)力工程顧問有限公司，510170。
