钢筋混凝土矩形高桥墩的稳定性研究

发布时间：2018-02-20 07:01

本文关键词： 高桥墩 ABAQUS 数值积分法极限承载力稳定性长细比　出处：《南京理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：随着我国道路建设的高速发展,在跨越山岭重丘地带时修建了大量的高墩桥梁,钢筋混凝土矩形高桥墩有着工艺简单、易于支模、便于施工等优点,得到了广泛的应用。随着桥墩的长细比变大,高墩的稳定性变得越来越重要。本文对方形和矩形钢筋混凝土轴压和偏压构件的稳定性及影响因素进行研究,依托各闷特大桥为工程背景,根据实际的荷载参数对高桥墩的稳定性进行分析,主要内容如下：(1)基于前人的研究成果,选用适当的材料本构模型,采用数值积分法对方形和矩形钢筋混凝土轴压和偏压构件的极限承载力进行编程计算。用ABAQUS有限元软件对方形和矩形钢筋混凝土轴压和偏压构件进行模拟分析,将数值积分法和ABAQUS的计算结果与试验结果进行对比,结果吻合较好。(2)采用数值积分法和ABAQUS有限元软件进行参数分析,通过变化混凝土单轴抗压强度、钢材屈服强度、配筋率、长细比等,分析影响方形和矩形钢筋混凝土轴压和偏压柱极限承载力的因素。(3)对实际桥墩进行简化处理,利用本文的研究方法对实际桥墩进行模拟计算分析。分析混凝土单轴抗压强度、钢材屈服强度、配筋率和水平荷载对其稳定承载力的影响。
[Abstract]:With the rapid development of road construction in our country, a large number of high pier bridges have been built when crossing the mountainous and heavy hilly areas. The reinforced concrete rectangular high pier has the advantages of simple technology, easy formwork and easy construction, etc. The stability of high pier becomes more and more important as the aspect ratio of bridge piers increases. The stability and influencing factors of square and rectangular reinforced concrete members under axial and eccentric loads are studied in this paper. The stability of high pier is analyzed according to the actual load parameters. The main contents are as follows: 1) based on the previous research results, the appropriate material constitutive model is selected. The ultimate bearing capacity of square and rectangular reinforced concrete members under axial compression and eccentric compression is calculated by numerical integration method. The finite element software ABAQUS is used to simulate and analyze the axial and eccentric compression members of square and rectangular reinforced concrete. The calculated results of numerical integration method and ABAQUS are compared with the experimental results. The results are in good agreement with the experimental results. The numerical integration method and ABAQUS finite element software are used to analyze the parameters. The uniaxial compressive strength of concrete, the yield strength of steel, the ratio of reinforcement are changed. The slenderness ratio, etc., analyzes the factors that affect the ultimate bearing capacity of square and rectangular reinforced concrete columns under axial compression and eccentric compression. By using the research method in this paper, the effects of uniaxial compressive strength, steel yield strength, reinforcement ratio and horizontal load on the stability bearing capacity of concrete pier are analyzed.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U441

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