CFRP布加固钢筋混凝土异形柱力学性能数值研究

发布时间：2018-03-10 16:41

  本文选题：偏心距　切入点：肢长比　出处：《东北石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：异形柱是指其截面为L形、T形、十字形等形式的柱体,该种形式的柱子能够有效的避免室内出现明显的棱角、减轻结构的自重,并且使建筑内部布局更加美观。虽然异形柱有很多方面的优点,但对钢筋混凝土异形截面柱力学性能的研究还很匮乏。近年来,由于钢筋混凝土异形柱结构体系的广泛应用,对于钢筋混凝土异形柱结构体系的探索与研究成为一项重要研究课题。混凝土柱使用过程中可能面临施工后混凝土浇筑强度低,设计荷载与实际应用荷载不符合等情况。针对于钢筋混凝土异形截面柱,采用合理的加固方式尤为必要,碳纤维布作为相对成熟的加固材料,对异形柱的加固具有重要意义。本文将基于ABAQUS有限元模型,对CFRP布加固混凝土异形截面柱的力学性能进行研究。本文的主要研究工作包括:1.对CFRP布加固钢筋混凝土L形截面柱的相关理论公式进行补充和丰富。2.建立合理的CFRP布加固钢筋混凝土异形截面柱有限元模型,根据已有的参考文献对模型的正确性加以验证,从而为后续的研究奠定基础。3.拓展研究参数,基于ABAQUS分析的结果,确定偏心距、CFRP布粘贴层数、肢长比,混凝土强度等级、肢长肢厚比五个因素对CFRP布加固钢筋混凝土异形截面柱的影响规律。4.根据有限元分析结果,为工程实际应用以及后续学者的研究提供科学依据。
[Abstract]:Special-shaped columns refer to columns whose sections are L-shaped T-shaped, cross-shaped and so on. The columns of this form can effectively avoid the appearance of obvious edges in the interior and reduce the weight of the structure. Although special-shaped columns have many advantages, the study of mechanical properties of special-shaped reinforced concrete columns is still scarce. In recent years, due to the widespread application of reinforced concrete special-shaped columns, The exploration and study of reinforced concrete special-shaped column structure system has become an important research topic. The design load does not accord with the actual applied load. It is necessary to adopt a reasonable reinforcement method for reinforced concrete special-shaped cross-section columns, and carbon fiber sheet is used as a relatively mature reinforcement material. This paper is based on the ABAQUS finite element model. The mechanical properties of reinforced concrete special-section columns strengthened with CFRP sheets are studied. The main research work in this paper includes: 1. Supplement and enrich the relevant theoretical formulas of reinforced concrete L-section columns strengthened with CFRP sheets. Finite element model of reinforced concrete special-section columns strengthened with CFRP sheets, The correctness of the model is verified according to the existing references, thus laying a foundation for further research. 3. Based on the results of ABAQUS analysis, the number of layers attached to the eccentric ABAQUS cloth, the ratio of limb length to length, and the grade of concrete strength are determined. The effects of the ratio of limb length to limb thickness on the reinforcement of reinforced concrete special-section columns with CFRP sheets. 4. According to the results of finite element analysis, this paper provides a scientific basis for the practical application of engineering and the subsequent research by scholars.
【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】：TU375.3
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本文编号：1594190