云南少数民族干栏式房屋抗震加固试验研究

发布时间：2018-01-13 07:23

本文关键词：云南少数民族干栏式房屋抗震加固试验研究　出处：《北方工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：干栏式房屋是具有悠久历史的古老建筑,是我国古建筑文化的重要组成部分。干栏式房屋主要分布于滇西北、滇西以及滇西南地区,分布区域抗震设防烈度多在7度以上,而少数民族地区发展滞后,抗震意识薄弱,房屋缺乏有效的抗震构造措施。云南地震灾害频率高、强度高,极灾区多处于农村,多数干栏式房屋经历过强震而出现不同程度的结构倾斜和构件损坏,很难保证在之后的地震灾害中生存下来,有着巨大的抗震隐患。本文针对干栏式房屋结构抗震性能和加固改造措施展开试验和数值模拟研究,研究结果可对干栏式结构的抗震加固和改造提供有意义的建议。具体工作内容和结论有以下几个方面:(1)对少数民族干栏式房屋分布的滇西南部分区域进行实地调研和村民访谈,总结调研结果和相关文献资料,分析了干栏式房屋和其他房屋的现状与存在的问题。调研中发现部分地区传统干栏式木结构以及新兴的砖柱干栏式结构存在不同的抗震问题,后者抗剪承载力的不足给该类结构带来巨大的抗震隐患。(2)选取调研区域某砖柱干栏式房屋为研究对象,设计制作三个原型尺寸的砖柱木梁梁柱式试件,提出外包角钢加固与碳纤维布加固两种加固方法,进行低周反复荷载试验,研究不同加固方式下试件的荷载位移滞回曲线、极限承载力和延性等抗震性能。试验结果表明,砖柱木梁结构抗震性能较差,在水平作用力表现为脆性剪切破坏。两种加固方法均有效地提高了结构的抗震性能。(3)对未加固砖柱木梁框架和角钢加固框架进行了非线性有限元分析,结果与试验结果吻合较好,表明混凝土损伤塑性模型可以有效的对这种结构进行有限元分析计算,为该类结构有限元计算提供参考。
[Abstract]:Qianlan house is an ancient building with a long history and an important part of Chinese ancient architectural culture. It is mainly distributed in northwest Yunnan, western Yunnan and southwest Yunnan. The seismic fortification intensity in the distribution area is more than 7 degrees, but the development of minority area is lagging behind, the seismic consciousness is weak, the house lacks effective seismic structural measures. Yunnan earthquake disaster frequency is high, the intensity is high. Most of the quake-hit areas are located in rural areas, most of the dry-hurdle houses have experienced strong earthquakes and appear different degrees of structural tilt and component damage, it is difficult to ensure survival in the subsequent earthquake disaster. In this paper, the seismic behavior and reinforcement measures of dry-column building structure are studied by experiment and numerical simulation. The results of the study can provide meaningful suggestions for seismic reinforcement and reconstruction of dry-column structures. The concrete work contents and conclusions are as follows: 1). Field investigation and villager interviews were carried out in some areas of southwest Yunnan where the houses were distributed in Gan Lan style of ethnic minorities. Summarize the research results and related literature. This paper analyzes the present situation and existing problems of dry-column houses and other houses, and finds out that there are different aseismic problems in traditional dry-column wooden structures and new brick-column dry-column structures in some areas. The lack of shear capacity of the latter brings huge seismic hidden trouble to this kind of structure. (2) A brick column dry column house in the investigation area is selected as the research object, and three prototype sizes of brick column beam beam and column type specimen are designed and manufactured. In this paper, two reinforcement methods, external angle steel reinforcement and carbon fiber sheet reinforcement, are put forward to carry out low cycle repeated load test and to study the hysteretic curve of load displacement of specimens under different reinforcement methods. The experimental results show that the seismic performance of brick column and wood beam is poor. The two reinforcement methods can effectively improve the seismic performance of the structure. The nonlinear finite element analysis of the unstrengthened brick column beam frame and the angle steel reinforced frame is carried out. The results are in good agreement with the experimental results, which indicates that the concrete damage plastic model can be used to analyze and calculate this kind of structure effectively, which provides a reference for the finite element calculation of this kind of structure.
【学位授予单位】：北方工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.11

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