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钢筋混凝土结构的本构关系及有限元模式【作者】张远高 【导师】黄克智; 陆明万

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4a[;Bz4z0钢筋混凝土结构的本构关系有限元模式

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【作者】张远高导师黄克智; 陆明万
:i9rE A#?)v/C4v*k0【作者基本信息】清华大学,固体力学,1990年,博士

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【中文摘要】 本文建立了混凝土材料新的三参数破坏准则,该准则具有函数形式简单、参数少、实验标定方便等特点,并与实验数据相吻合:提出一种修正的变模量本构模型,克服了中性变载时增量应力应变关系的不连续性:给出了用于三维有限元分析的开裂混凝土的本构关系,并基于裂缝带的柱状骨料咬合模型和混凝土的修正变模量本构模型导出了具体表达式:对于描述钢筋销栓作用的弹性地基梁模型,求得了地基弹性系数的弹性理论解析解。 本文建立了用于大型结构分析的弥散/分层加筋混凝土有限元模式,该模式综合了上述特点,能在一个单元中同时考虑钢筋和混凝土的弹塑性变形、混凝土的开裂、拉伸硬化及钢筋销栓作用等非线性效应,该模式已成功地接入非线性静动力有限元分析通用软件ADINA,为大型钢筋混凝土结构有限元分析提供了有效工具。校核性算例及实例分析的结果验证了该模式的合理性与程序的可靠性。 本文提出了修正牛顿迭代格式的二次加速方法。该方法比Aitken加速法有更快的收敛速度;给出了非对称刚度矩阵的对称化条件。水利论文&U-Z"I h H_

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【英文摘要】 In this dissertation, the investigations on finite element analysis of concrete structures have been summarized. And several essential models for the analysis have been established. The main features are presented as follows.A. Two kinds of three-parameter failure criteria for plain concrete have been established. Both of them are in good agreement with available experimental data.B. A modified variable-modulus constitutive model has been established. It guarantees the continuity of incremental stress-strain relationship near neutral loadings.C. General constitutive relationships of cracked concrete have been deduced for three dimensional analysis.D. Based on CEB-FIP code, a new method has been adopted to model the tension stiffening of reinforced concrete.E. Based on elasticity, formulas are given to estimate the stiffness coefficient of foundation in the model of beam on an elastic foundation used to describe dowel actions.F. The smeared / layered reinforced concrete model for finite...更多 element analysis established by the author has been improved. It takes account of nonlinear effects such as plastic deformation, concrete cracking, tension stiffening, dowel actions, etc.G. An efficient, simple iteration procedure has been introduced to solve nonlinear finite element equations.H. Conditions to symmetrize nonsymmetric stiffness matrix have been formulated. Necessary programs relative to the above features have been developed and implemented into ADINA code. The results of numerical examples are satisfactory.  还原水利论文[ l!c[ g2v7Z H

9G(M*v2s]I+jQ0【中文关键词】 钢筋混凝土; 破坏准则; 本构关系; 裂缝(带); 有限元水利论文rQwQ@?C
【英文关键词】 (reinforced) concrete; failure criterion; constitutive relation; crack band; finite element

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TAG: 黄克智 有限元 陆明万 张远高 本构关系
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