RPC混凝土轴心受压柱试验研究及可靠度分析

发布时间：2018-03-11 08:39

本文选题：活性粉末混凝土　切入点：轴心受压柱　出处：《湖南大学》2015年硕士论文　论文类型：学位论文

【摘要】：在国内外活性粉末混凝土及混凝土轴心受压柱研究的基础上,对20根活性粉末混凝土(RPC)柱进行了轴心受压试验研究,试验变化参数主要为长细比和活性粉末混凝土强度。运用ABAQUS有限元软件对部分试件的轴压过程进行了模拟分析,最后对活性粉末混凝土轴心受压柱进行了可靠度分析。本文完成的主要工作有:1.简要介绍了活性粉末混凝土的基本原理及研究进展,指出活性粉末混凝土这种新型材料在工程建设中具有广阔的应用前景。总结了国内外混凝土轴心受压柱的研究成果,提出活性粉末混凝土在受压构件中受力性能研究的必要性。2.制作完成了20根活性粉末混凝土试验轴心受压柱的试验,在试验中量测了柱的应变、挠度,获得了极限承载力等重要数据。观察了活性粉末混凝土轴心受压柱的受力变化过程和破坏形态,获得了活性粉末混凝土轴心受压柱的荷载-应变,荷载-挠度曲线,在与普通混凝土轴心受压柱稳定系数?比较分析的基础上,对活性粉末混凝土轴心受压柱稳定系数?取值给出了设计建议。3.利用ABAQUS商业软件建立了活性粉末混凝土轴心受压柱的非线性有限元模型,用非线性有限元模型分析得到了活性粉末混凝土轴心受压柱的荷载-应变曲线,破坏时的应力云图及承载力,并与试验结果进行了比较分析。4.编制了活性粉末混凝土轴心受压柱的可靠度计算程序,对活性粉末混凝土轴心受压柱进行了可靠度分析,探讨了混凝土强度、可变荷载组合类型、荷载效应比等因素对构件可靠指标的影响。
[Abstract]:Based on the research of reactive powder concrete and concrete columns under axial compression at home and abroad, the axial compression tests of 20 reactive powder concrete (RPC) columns have been carried out. The test parameters are mainly slenderness ratio and reactive powder concrete strength. The axial compression process of some specimens is simulated and analyzed by using ABAQUS finite element software. Finally, the reliability of the reactive powder concrete columns under axial compression is analyzed. The main work accomplished in this paper is: 1. The basic principle and research progress of reactive powder concrete are briefly introduced. It is pointed out that reactive powder concrete (RPC), a new type of material, has broad application prospects in engineering construction. The research results of concrete axial compression columns at home and abroad are summarized. The necessity of studying the mechanical behavior of reactive powder concrete in compression member is put forward. Twenty test columns of reactive powder concrete under axial compression have been made and the strain and deflection of the columns have been measured. Some important data, such as ultimate bearing capacity, are obtained. The stress variation process and failure mode of RPC columns under axial compression are observed. The load-strain, load-deflection curves of RPC columns under axial compression are obtained. Stability coefficient of columns under axial compression with ordinary concrete? On the basis of comparative analysis, the stability coefficient of reactive powder concrete (RPC) columns under axial compression is studied. Using ABAQUS commercial software, the nonlinear finite element model of the reactive powder concrete columns under axial compression is established. The load-strain curves of the reactive powder concrete columns under axial compression are obtained by using the nonlinear finite element model. The stress cloud diagram and bearing capacity during failure are compared with the experimental results. 4. A program for calculating the reliability of reactive powder concrete (RPC) columns under axial compression is worked out, and the reliability of RPC columns under axial compression is analyzed. The influence of concrete strength, variable load combination type and load-effect ratio on the reliability index of members is discussed.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU37

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