论文中文题名: | 粘碳纤维布法加固钢筋混凝土偏压构件的受力性能研究 |
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学号: | 201209404 |
学科代码: | 081402 |
学科名称: | 结构工程 |
学生类型: | 硕士 |
学位年度: | 2015 |
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研究方向: | 建筑物加固改造理论与技术 |
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论文外文题名: | Experimental research on the eccentric loaded column strengthened under CFRP |
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论文中文摘要: |
目前我国存在的既有建筑物面积约600亿㎡,其中大量的既有建筑因为在建造期建设标准过低、环境影响以及人民生活水平提高,建筑功能不能满足要求等因素,需要对其进行加固改造。粘贴碳纤维布加固法是一种成熟的、先进的加固方法,它具有施工方便,节约人力资源,对于加固构件截面面积和体积质量改变较小等优点,在实际的工程应用中起到了重要作用,但还有很多问题有待解决,因此对粘碳纤维布法加固钢筋混凝土偏压构件的受力性能研究有着重要的理论意义和工程应用价值。
本课题研究分析了粘碳纤维布法加固偏心受压构件的受力机理,提出对偏压构件表面粘贴碳纤维布采用有间隔的环箍式布置以及纵横式的综合布置方式,并制作了4个试件,采用结构静载试验进行研究。通过试验,研究了粘碳纤维布法加固偏压构件的各项受力性能,试验结果表明,环向碳纤维布通过套箍作用提高了构件的承载力及延性、推迟了开裂荷载的出现、减小了裂缝宽度和裂缝间距;纵向碳纤维布不仅增强了受拉区纵筋的抗拉强度,而且将环向碳纤维布连为一体,进一步增强了套箍作用;数值模拟结果考虑加固结构二次受力后,加固构件的承载力较试验结果略小。最后对粘碳纤维布法加固偏压构件的正截面承载力公式提出了改进意见。
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论文外文摘要: |
At present, it has about 600 million square meters of the building area in our country, a large number of existing building need to be reinforced because of low standard ,the environment and the function which can not meet the requirements of people. Method of CFRP is a kind of mature and advanced reinforcement method, it is convenient and saves human resources.It changes little of the section area and volume of the strengthened column .There's still a lot of problems to be solved.It is very important to research on the eccentric loaded column strengthened under CFRP.
This topic analyzes the mechanism of the eccentric loaded column strengthened under CFRP. According to the mechanism, it puts forward how to paste the CFRP,one is annular CFRP,the other one is both annular and longitudinal CFRP ,and it made four specimens, which one is not strengthened. Through the experiment ,it acknowledges the force performance of the reinforced column. The test results show the annular CFRP improves the components of the bearing capacity and ductility, delays the emergence of cracking load, reduces the cracking width and cracking space; longitudinal CFRP will connnect the annular CFRP as a whole, and enhance the hooping effect. Finally, the improvement opinions of the formula for the bearing capacity are put forward.
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中图分类号: | TU375.3 |
开放日期: | 2015-06-15 |