沈阳某车站钢筋混凝土框架结构的检测鉴定与加固

发布时间：2018-06-11 11:12

本文选题：混凝土框架结构 + 碳纤维布　；参考：《辽宁科技大学》2013年硕士论文

【摘要】：目前，我国的大部分建筑物都是钢筋混凝土结构，由于自身老化、各种自然灾害和人为损伤等原因，使建筑物不断产生各种结构安全隐患。因此，对已有建筑结构的检测、维修、加固和改造是国际上普遍关注的问题。在我国，钢筋混凝土框架结构的检测、维修、加固改造研究等工作起步较晚，已有结构的安全性评定标准还不完善。因此，对钢筋混凝土框架结构的检测、维修、加固改造等方面进一步的研究是十分有必要的。同时，结构检测鉴定及加固技术的发展对提高建筑工程的质量、节省国家与企业的资金和保障企业生产安全等方面起到了积极的作用。本文从钢筋混凝土框架结构的质量要求出发，阐述了钢筋混凝土框架结构检测的内容，并对各种钢筋混凝土框架结构检测方法进行了总结和归纳；同时也对加固结构的受力特征进行科学的分析，阐明了结构加固的工作程序；然后对钢筋混凝土框架结构的主要加固技术如加大截面法、外包钢加固法、外部粘钢加固法、粘贴碳纤维法等进行了详细的介绍。本文结合参与的加固工程实例，，对混凝土框架结构的检测、加固改造进行了深入的分析，并结合工程特点选择了用碳纤维布进行加固的方法，并通过对框架梁、柱的计算对该加固方法进行了进一步研究；同时介绍了碳纤维布加固方法的施工工艺等，对钢筋混凝土框架结构的加固改造有一定的借鉴作用。采用ANSYS软件对碳纤维布加固混凝土简支梁的受力性能进行了非线性有限元分析，通过加固梁与未加固梁的有限元结果对比分析可以得出：加固梁的抗弯承载力可以显著提高，此外，相对于未加固梁来说，在同一荷载作用下，加固梁的挠度比未加固梁明显减小，裂缝和宽度变小，刚度明显提高，这些都与国内外所做试验结果相符合。
[Abstract]:At present, most of the buildings in our country are reinforced concrete structures. Due to their own aging, natural disasters and man-made damage, the buildings have a variety of structural safety risks. Therefore, the detection, maintenance, reinforcement and reconstruction of existing building structures are of international concern. In China, the inspection, maintenance, reinforcement and reconstruction of reinforced concrete frame structure started late, and the safety assessment standard of existing structures is not perfect. Therefore, it is necessary to study the detection, maintenance, reinforcement and reconstruction of reinforced concrete frame structure. At the same time, the development of structural inspection, appraisal and reinforcement technology will improve the quality of building engineering. Saving the funds of the state and enterprises and ensuring the production safety of the enterprises have played a positive role. This paper expounds the content of the inspection of reinforced concrete frame structure from the quality requirements of the reinforced concrete frame structure. The testing methods of reinforced concrete frame structure are summarized and summarized, and the stress characteristics of reinforced concrete frame structure are analyzed scientifically, and the working procedure of strengthening structure is expounded. Then, the main reinforcement techniques of reinforced concrete frame structure such as increasing section method, external steel reinforcement method, external bonding steel reinforcement method and carbon fiber bonding method are introduced in detail. The testing and strengthening of concrete frame structure are analyzed deeply, and the method of strengthening with carbon fiber sheet is selected according to the characteristics of the project, and the reinforcement method is further studied through the calculation of frame beam and column. At the same time, the paper introduces the construction technology of carbon fiber sheet strengthening method, It can be used as a reference for the reinforcement and transformation of reinforced concrete frame structure. The nonlinear finite element analysis of the mechanical behavior of simply supported concrete beams strengthened with CFRP is carried out by using ANSYS software. By comparing the finite element results of the strengthened and unstrengthened beams, it is concluded that the flexural capacity of the strengthened beams can be significantly increased, in addition, compared with the unstrengthened beams, under the same load, The deflection of the strengthened beam is obviously smaller than that of the unstrengthened beam, the cracks and widths become smaller, and the stiffness of the strengthened beam is obviously increased, which is in accordance with the experimental results made at home and abroad.
【学位授予单位】：辽宁科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU375.4

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