【摘要】 钢筋混凝土结构是土建工程中应用最广泛的结构形式,对其进行精确的应力损伤分析有着极其重要的工程实际意义。钢筋混凝土构件经常是在不同的环境荷载和机械荷载共同作用下工作,传统模型对其进行应力损伤分析时,仅仅是定性的分析,不能对混凝土构件的应力损伤做出精确的分析。提出钢筋混凝土柱状结构下的应力损伤分析模型,以钢材和混凝土材料损伤模型为基础,对筋混凝土柱的拟静力试验进行模拟分布,构建钢筋混凝土柱状结构下的应力损伤模型,进行损伤分析,得出定量分析结论。以刚度退化和自由能退化线性组合为基础进行平面布置和里面布置进行组元分解,分析钢筋混凝土构件荷载在应力作用下与之正交方向的损伤程度。结合数值算例进行了模拟分析,采用指数函数对残余应力进行了拟合,设计多组钢筋混凝土柱状结构模型进行对比实验,采用ANSYS软件分析钢筋混凝土柱状结构的损伤云图。结果表明采用该模型分析结果精确,可以描述钢筋混凝土柱状结构下的应力损伤过程,工程应用价值较大。更多还原

【Abstract】 Reinforced concrete structure is the most widely used in civil engineering structure, carry on the accurate stress damage analysis has extremely important practical significance.Reinforced concrete members are often in a different environment work under the joint action of load and mechanical load, the traditional model of stress damage analysis, isonly qualitative analysis, to be precise on stress of the concrete member damage analysis.Put forward the structure of reinforced concrete column under stress damage analysis model, based on the materials of the steel and concrete damage model, to simulate the quasi static test of reinforced concrete column distribution, construction of reinforced concrete column under stress damage model, damage analysis, quantitative analysis of the conclusions.In free energy degradation and stiffness degradation based on the linear combination of components inside the plane layout and arrangement of decomposition, load analysis of reinforced concrete members under the action of stress and the damage degree of the orthogonal direction.Combined with a numerical example, simulated and analyzed using exponential function to simulate the residual stress, design more groups of reinforced concrete column structure model experiments, using ANSYS software analysis of reinforced concrete column structure damage cloud.Results show that using the results of the analysis precision, the model can describe the structure of reinforced concrete column under stress damage process of relatively great value in engineering application.更多还原