GFRP管混凝土构件受力性能有限元分析
发布时间：2018-10-15 13:57
【摘要】：纤维增强复合材料作为一种新型材料,因其具有高强、耐腐蚀、轻质等优点已引起了国内外学者的关注,其中FRP纤维缠绕管最具代表性。FRP管与混凝土以及钢筋(或钢管)等组成的组合结构由于外层FRP管的存在不仅能够有效的抵御恶劣环境对混凝土的侵蚀从而提高了结构的耐久性,而且可以约束内层混凝土的横向变形,改善了混凝土的受力性能,从而提高了混凝土的承载能力,这些优势的存在使得这种组合结构成为了当前国内外学者研究的热点。在FRP管混凝土、FRP管钢筋混凝土等结构研究基础上,通过大型有限元ABAQUS软件研究GFRP管素混凝土构件、GFRP管钢筋混凝土构件以及GFRP管-混凝土-钢管组合构件的轴心受压、偏心受压和受弯的力学性能,主要的研究内容如下：采用有限元方法对GFRP管素混凝土、GFRP管钢筋混凝土以及GFRP管-混凝土-钢管三种构件进行了轴压的计算分析,通过荷载-轴向应变曲线研究构件的受力机理,给出各个特征点处构件的应力分布情况。为了验证模型的正确性,将计算得到的结果与文献试验结果进行对比,两者吻合较好。基于模型的正确性,计算分析GFRP管厚度、GFRP管纤维缠绕角度、混凝土强度等级、长径比等设计参数对构件承载力的影响,得出承载力随着这些设计参数的变化规律。对GFRP管素混凝土、GFRP管钢筋混凝土以及GFRP管-混凝土-钢管三种构件分别进行了偏压和抗弯性能的计算分析。通过与文献试验结果的对比验证了模型的正确性。另外,计算分析偏心距、钢管厚度、空心率、长径比等设计参数对构件承载力的影响,得出承载力随着这些设计参数的变化规律。
[Abstract]:As a new type of material, fiber reinforced composites have attracted the attention of scholars at home and abroad because of their advantages of high strength, corrosion resistance and light weight. Among them, FRP filament winding pipe is the most representative. The composite structure composed of FRP pipe, concrete and steel bar (or steel pipe) can not only effectively resist the corrosion of concrete in bad environment, but also improve the durability of the structure because of the existence of outer FRP pipe. Moreover, the lateral deformation of inner layer concrete can be restrained, and the mechanical behavior of concrete can be improved, thus the bearing capacity of concrete can be improved. These advantages make this kind of composite structure become a hot spot of research at home and abroad. Based on the research of FRP pipe concrete, FRP pipe reinforced concrete and so on, the axial compression of GFRP tube concrete member, GFRP tube reinforced concrete member and GFRP pipe concrete-steel tube composite member is studied by using the large finite element ABAQUS software. The main contents of this paper are as follows: finite element method is used to calculate and analyze the axial compression of GFRP tube concrete, GFRP pipe reinforced concrete and GFRP pipe-concrete-steel tube. Based on the load-axial strain curve, the stress distribution at each characteristic point is given. In order to verify the correctness of the model, the calculated results are in good agreement with the experimental results. Based on the correctness of the model, the influence of the design parameters such as GFRP pipe thickness, GFRP pipe filament winding angle, concrete strength grade and aspect ratio on the bearing capacity of the member is calculated and analyzed, and the variation law of bearing capacity with these design parameters is obtained. The GFRP tube concrete, GFRP pipe reinforced concrete and GFRP pipe-concrete-steel tube are calculated and analyzed respectively. The correctness of the model is verified by comparison with the experimental results in literature. In addition, the influence of design parameters such as eccentricity, thickness of steel tube, heart rate of air and ratio of length to diameter on the bearing capacity of members is calculated and analyzed, and the variation law of bearing capacity with these design parameters is obtained.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9
本文编号：2272761
[Abstract]:As a new type of material, fiber reinforced composites have attracted the attention of scholars at home and abroad because of their advantages of high strength, corrosion resistance and light weight. Among them, FRP filament winding pipe is the most representative. The composite structure composed of FRP pipe, concrete and steel bar (or steel pipe) can not only effectively resist the corrosion of concrete in bad environment, but also improve the durability of the structure because of the existence of outer FRP pipe. Moreover, the lateral deformation of inner layer concrete can be restrained, and the mechanical behavior of concrete can be improved, thus the bearing capacity of concrete can be improved. These advantages make this kind of composite structure become a hot spot of research at home and abroad. Based on the research of FRP pipe concrete, FRP pipe reinforced concrete and so on, the axial compression of GFRP tube concrete member, GFRP tube reinforced concrete member and GFRP pipe concrete-steel tube composite member is studied by using the large finite element ABAQUS software. The main contents of this paper are as follows: finite element method is used to calculate and analyze the axial compression of GFRP tube concrete, GFRP pipe reinforced concrete and GFRP pipe-concrete-steel tube. Based on the load-axial strain curve, the stress distribution at each characteristic point is given. In order to verify the correctness of the model, the calculated results are in good agreement with the experimental results. Based on the correctness of the model, the influence of the design parameters such as GFRP pipe thickness, GFRP pipe filament winding angle, concrete strength grade and aspect ratio on the bearing capacity of the member is calculated and analyzed, and the variation law of bearing capacity with these design parameters is obtained. The GFRP tube concrete, GFRP pipe reinforced concrete and GFRP pipe-concrete-steel tube are calculated and analyzed respectively. The correctness of the model is verified by comparison with the experimental results in literature. In addition, the influence of design parameters such as eccentricity, thickness of steel tube, heart rate of air and ratio of length to diameter on the bearing capacity of members is calculated and analyzed, and the variation law of bearing capacity with these design parameters is obtained.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9
【参考文献】
相关期刊论文 前1条
1 滕锦光;余涛;黄玉龙;董石麟;杨有福;;FRP管-混凝土-钢管组合柱力学性能的试验研究和理论分析[J];建筑钢结构进展;2006年05期
，本文编号：2272761
本文链接：https://www.wllwen.com/guanlilunwen/chengjian/2272761.html
