GFRP管-混凝土-钢管组合长柱轴压力学性能研究

发布时间：2018-02-25 03:09

  本文关键词： ANSYS 核心混凝土 高径比 空心率　出处：《东北石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：GFRP管-混凝土-钢管组合柱是由GFRP外管、内置钢管和两者之间的混凝土三部分组成的新型组合构件,它兼具双GFRP管混凝土组合柱、双钢管混凝土组合柱和GFRP管实心混凝土柱三者的优点于一身。GFRP管通过约束核心混凝土从而提高组合构件的承载力,同时能够有效的保护混凝土和钢管,具有良好的延性和抗震性能。从而可以看出,该组合结构具有广阔的应用前景。目前,对于GFRP管-混凝土-钢管组合长柱的研究相对比较匮乏,为研究GFRP管-混凝土-钢管组合长柱轴心受压下的力学性能,本文将建立GFRP管-混凝土-钢管组合长柱的有限元模型,在验证了模型正确性的基础上,深入研究空心率、高径比、混凝土强度、GFRP管壁厚度这四种影响参数对组合构件力学性能的影响。主要研究工作包括:1.对GFRP管-混凝土-钢管组合柱进行截面形式设计。2.通过有限元软件ANSYS,结合试验的构件参数,建立与之对应的GFRP管-混凝土-钢管组合柱的有限元模型,通过对比极限承载力、荷载-位移曲线来验证选取的本构关系和建模方法的正确性。3.拓展参数,确定所要进行研究工况的试件的参数,建立有限元模型,得到该结构形式在不同空心率、不同高径比、不同混凝土强度、不同GFRP管壁厚度下的承载力变化规律。4.基于有限元模拟所获得的结果,最终确定以上四个因素,对GFRP管-混凝土-钢管组合长柱轴心受压下极限承载力的影响规律。5.确定合理的高径比、混凝土强度、空心率和GFRP管壁厚度。为工程设计提出建议。
[Abstract]:GFRP tube-concrete-steel tube composite column is a new type of composite member composed of GFRP outer pipe, built-in steel pipe and concrete between them. It has double GFRP pipe concrete composite column. The advantages of double-filled steel tube concrete composite column and GFRP tube solid concrete column are that. GFRP pipe can effectively protect concrete and steel tube by restricting the core concrete to improve the bearing capacity of the composite member. It can be seen that the composite structure has a broad application prospect. At present, the research of GFRP pipe concrete steel tube composite long column is relatively scarce. In order to study the mechanical properties of GFRP pipe-concrete-steel tube composite columns under axial compression, the finite element model of GFRP pipe-concrete-steel tube composite columns is established in this paper. On the basis of verifying the correctness of the model, the hollow rate is studied in depth. Ratio of height to diameter, The influence of four influence parameters of concrete strength and wall thickness on the mechanical properties of composite members. The main research work includes: 1. The section form design of GFRP tube-concrete-steel pipe composite column .2.Through finite element software ANSYS, the junction is obtained. Component parameters of the combined test, The corresponding finite element model of GFRP tube-concrete-steel tube composite column is established. By comparing ultimate bearing capacity and load-displacement curve, the correctness of the selected constitutive relation and modeling method is verified. The parameters of the specimen are determined, the finite element model is established, and the structure forms are obtained in different hollow ratio, different aspect ratio, different concrete strength. The variation of bearing capacity under different thickness of GFRP pipe wall. 4. Based on the results obtained by finite element simulation, the above four factors are finally determined. The effect of axial compression on ultimate bearing capacity of GFRP pipe-concrete-steel tube composite long column is studied. 5. Reasonable ratio of height to diameter, concrete strength, hollow ratio and thickness of GFRP pipe wall are determined. Suggestions for engineering design are put forward.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.9
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本文编号：1532770