碳纤维加固混凝土结构的抗震性能分析
发布时间：2019-04-10 15:56
【摘要】：碳纤维加固技术是用结构胶黏剂（环氧树脂）将具有高弹性模量、抗拉强度高的碳纤维材料沿轴线方向或垂直于轴线方向粘贴在需要加固的构件受拉表面。增强了结构的抗拉、抗剪和抗裂性，有效的改善构件的延性和抗震性能，从而达到了补强和加固混凝土结构的目的。 首先论述了碳纤维加固混凝土结构的背景、国内外研究现状、加固基本原理和计算方法。选择恰当的混凝土、钢筋、碳纤维的本构关系后，通过对一个2005年设计并施工的二层幼儿园框架结构按照现行规范的要求，在加强抗震措施和提高抗震设防烈度的情况下，对结构进行加固设计。 结合工程实例，并通过规范计算和SAP2000分析软件的计算结果作为的对比分析，验证了Perform-3D分析软件结果的正确性和实用性。根据计算结果可知：在重力荷载作用下，加固后结构的承载力明显提高；通过弹塑性静力分析，碳纤维加固受力构件对结构的初始弹性刚度影响不大，加固后混凝土结构延性的提高幅度明显高于极限承载力的提高幅度；通过弹塑性动力时程分析，加固后混凝土结构随着延性的不断提高，，楼层位移和层间位移角都呈减小的趋势。
[Abstract]:Carbon fiber reinforcement technology is to use structural adhesive (epoxy resin) to paste the carbon fiber material with high elastic modulus and high tensile strength along the axis direction or perpendicular to the axis direction to the tensile surface of the member that needs to be strengthened. It enhances the tensile, shear and crack resistance of the structure, and effectively improves the ductility and seismic performance of the members, thus achieving the purpose of strengthening and strengthening the concrete structure. Firstly, the background of carbon fiber reinforced concrete structure, the research status at home and abroad, the basic principle and calculation method of strengthening are discussed. After choosing the proper constitutive relation of concrete, steel bar and carbon fiber, under the condition of strengthening seismic measures and enhancing seismic fortification intensity, a two-story kindergarten frame structure designed and constructed in 2005 is designed and constructed according to the requirements of the current code. The reinforcement design of the structure is carried out. Combined with engineering examples, the correctness and practicability of the results of Perform-3D analysis software are verified by comparing the results of standard calculation and SAP2000 analysis software. According to the calculation results, it can be seen that the bearing capacity of the reinforced structure increases obviously under the action of gravity load. The elasto-plastic static analysis shows that the initial elastic stiffness of the reinforced concrete structure is not affected greatly, and the ductility of the reinforced concrete structure is obviously higher than that of the ultimate bearing capacity. Through elastic-plastic dynamic time-history analysis, with the continuous increase of ductility of reinforced concrete structure, the floor displacement and the displacement angle between floors tend to decrease.
【学位授予单位】：河北联合大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU37;TU352.11
本文编号：2455930
[Abstract]:Carbon fiber reinforcement technology is to use structural adhesive (epoxy resin) to paste the carbon fiber material with high elastic modulus and high tensile strength along the axis direction or perpendicular to the axis direction to the tensile surface of the member that needs to be strengthened. It enhances the tensile, shear and crack resistance of the structure, and effectively improves the ductility and seismic performance of the members, thus achieving the purpose of strengthening and strengthening the concrete structure. Firstly, the background of carbon fiber reinforced concrete structure, the research status at home and abroad, the basic principle and calculation method of strengthening are discussed. After choosing the proper constitutive relation of concrete, steel bar and carbon fiber, under the condition of strengthening seismic measures and enhancing seismic fortification intensity, a two-story kindergarten frame structure designed and constructed in 2005 is designed and constructed according to the requirements of the current code. The reinforcement design of the structure is carried out. Combined with engineering examples, the correctness and practicability of the results of Perform-3D analysis software are verified by comparing the results of standard calculation and SAP2000 analysis software. According to the calculation results, it can be seen that the bearing capacity of the reinforced structure increases obviously under the action of gravity load. The elasto-plastic static analysis shows that the initial elastic stiffness of the reinforced concrete structure is not affected greatly, and the ductility of the reinforced concrete structure is obviously higher than that of the ultimate bearing capacity. Through elastic-plastic dynamic time-history analysis, with the continuous increase of ductility of reinforced concrete structure, the floor displacement and the displacement angle between floors tend to decrease.
【学位授予单位】：河北联合大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU37;TU352.11
本文编号：2455930
本文链接：https://www.wllwen.com/guanlilunwen/chengjian/2455930.html
