【摘要】 以转动裂缝模型为核心思想的修正压力场模型(MCFT)是近30年来钢筋混凝土剪扭行为研究成果的代表之一,提出通过大型通用有限元程序ABAQUS 6.9二次开发将修正压力场模型应用于非线性有限元分析中,并在该模型的基础上作出一定发展,使其适用于压拉弯剪复合作用下的钢筋混凝土结构、钢-混凝土组合结构的非线性分析。将该模型应用于国内外各种类型构件的分析中,包括钢筋混凝土梁(剪切破坏梁、弯曲破坏梁、弯剪复合破坏梁)、钢筋混凝土墙以及内嵌钢板混凝土组合墙,数值模拟结果与试验结果吻合良好,表明该模型充分兼顾准确性、通用性,为压拉弯剪复合作用下的钢筋混凝土结构、钢-混凝土组合结构的非线性分析提供了有效的手段。更多还原

【Abstract】 The modified compression-field theory(MCFT),which takes the rotating crack model as its core idea,is one of the most significant developments in the study on the shear and torsion behavior of the reinforced concrete over the past 30 years.By means of the user interfaces provided by FE Package ABAQUS 6.9,the MCFT model is incorporated into the nonlinear FE analysis.Furthermore,a planar membrane element is proposed for the nonlinear FE analysis of both reinforced concrete structures and steel-concrete composite structures subjected to compression,tension,flexure and shear.The proposed planar membrane element may be applied to the analysis of various structure members,including the reinforced concrete beams(in diagonal-tension failure mode,shear-compression failure mode and flexurecompression mode),reinforced concrete shear walls and steel-concrete composite walls.Good agreement between numerical and experimental results may be observed,indicating that the developed MCFT model has good accuracy and general applicability,and it may be used for the nonlinear FE analysis of both reinforced concrete structures and steelconcrete composite structures subjected to compression,tension,flexure and shear.更多还原