【作者】 卢会芳；

【导师】 彭少民；

【作者基本信息】 武汉理工大学 ， 结构工程， 2004， 硕士

【摘要】 砌体结构是一种古老的建筑结构型式，在房屋建筑结构中应用广泛。但是由于砌体结构材料的脆性性质，其抗剪、抗拉和抗弯强度均很低，因此砌体房屋的抗震能力较差，而我国又是一个多地震的国家，随着使用年限的增加和抗震设防标准的提高，砌体结构的抗震加固问题就显得日益突出。 碳纤维布加固技术是近些年来兴起的一种结构加固方法，因其具有质轻高强、施工便捷、耐腐蚀性及耐久性好，又不改变结构形状和不影响建筑外观等优点，使得碳纤维布加固技术在混凝土结构领域的研究相对成熟以后，近几年来在砌体结构领域也开始引起人们的关注(特别是碳纤维布加固技术所具有不改变结构形状和不影响建筑外观的优点，特别适用于历史文化建筑的加固)，并作了一些探索性研究，但各方面的理论还不成熟，因此要进行广泛应用并制订技术规程还必需做大量的基础性研究工作。 本文首先阐述了砌体结构在我国的发展现状和现有的加固方法，介绍了碳纤维布及其粘结材料的力学性能，综述了碳纤维布加固技术在国内外的研究与应用现状。然后从保护历史文化建筑出发，通过碳纤维布加固三片低强度无构造柱带窗洞墙片和三片低强度有构造柱带侧门洞墙片在低周往复荷载作用下的抗震性能试验，研究了碳纤维布对低强度砌体结构的抗震加固效果，对无构造柱带窗洞墙片和有构造柱带侧门墙片加固后的破坏形态、变形性能、耗能能力、极限承载力以及碳纤维布的受力特性进行了全面的分析，分别比较了不同加固方案的加固效果，讨论了影响碳纤维布加固后墙体承载力提高的因素，在此基础上分别对无构造柱带窗洞墙片和有构造柱带侧门墙片采用碳纤维布加固后抗剪承载力的计算进行了探讨，并提出了简化计算公式。通过本文试验表明，在地震作用下碳纤维布加固能减小开洞对砌体墙整体性的削弱作用，有效提高低强度砌体结构的抗震性能，在砌体结构中有广阔的应用前景。 最后对试验进行了较全面的总结，并提出了碳纤维布加固砌体墙需要进一步研究的问题。更多还原

【Abstract】 Masonry structure is a kind of age-old architecture structure and is widely used in buildings. But the masonry structure’ shearing strength, lengthening strength and bending strength are very low owing to the material’ brittleness, so the aseismatic behavior of masonry building is lower, together with China is a more earthquake country, along with the augment of the habitation years and the heighten of the aseismatic criterion, the aseismatic strengthening problem is very important.The strengthening technique of Carbon Fiber Reinforced Polymer(CFRP) is a kind of structure strengthening method arisen in several years. Because it has many advantages, such as light weight, high strength, convenient construction, excellent corrosion resistance, high fatigue strength and thin additive volume etc, which makes it regarded in masonry structure field by people recently after it is used maturely in the concrete structure field (especially adapting to immemorial buildings owing to thin additive volume), and some groping study has been done. But the theory isn’t mature, and a great deal of fundamental study needs to be done to generalize it and establish technique regulation.This paper expatiates Chinese masonry structure’ actuality and existing reinforced methods, summarizes CFRP strengthening technique’ study and applications actuality, and introduces the mechanics capability of CFRP and the adhesive. Then considering protecting immemorial buildings, through the experiment on seismic reinforcement of three low strength brick wall with a window and three low strength brick wall with a door by carbon fiber sheet under lower cycle reversal loads, the seismic reinforcement effectiveness is studied, such characteristics as the strengthened brick wall’s failure shape , deformation , energy consumption, load bearing capacity and CFS’s mechanics performance are generally analyzed, the different scheme’s reinforcement is compared, and the factor on the increase of bearing capacity is discussed. Based on above analyses, the paper discusses the calculation of shearing capacity to two kinds of brick walls and presents the simplified calculating formula. The test result indicates that the strengthening technique of CFS can reduce the weaken effect to masonry brick owing to windows or doors and can improve low strength masonry structure’ aseismatic capability. The application foreground is amplitude in masonry structure.At last, this paper concludes the experiment generally and presents some distinctive advices for further researching on CFRP-reinforcement of masonry wall in the future.更多还原