土坯墙承重民居加固修复技术与抗震试验研究
发布时间：2018-08-12 18:56
【摘要】：农村地区土坯建筑由于其本身材料强度低以及农民自筹自建的随意性,导致其整体性能差,抗震性能非常脆弱。近年来频繁发生地震灾害,作为传统民居主要结构形式之一的土坯墙承重民居,破坏非常严重,造成了大量人员伤亡和财产损失,对这些量大面广存在于农村地区的危房进行简单、经济、有效的抗震加固改造具有非常重要的现实意义。另外,土坯墙承重民居由于耐久性能差,正常使用阶段就会产生不同形式的开裂与剥蚀现象,严重影响其使用寿命与房屋安全,因此,如何采取合理的裂缝修复技术以增加土坯墙承重民居的耐久性能是本文研究的另一目的。本文主要研究内容如下:(1)通过对生土民居抗震性能脆弱的根本原因及其震害特征的分析研究,针对土坯建筑提出了两种经济、可行的加固技术:采用内外格栅配筋网加固承重土坯墙体与刻槽加固土坯围护墙体的方法。针对西北地区黄土与水玻璃的化学反应机理,提出了水玻璃修复生土墙体裂缝的方法。(2)按典型土坯墙承重民居的1/2缩尺制作模型,待模型完成后对其采用内外格栅配筋网的方法进行加固。根据相似关系,与选取的地震波,确定了详细的试验加载方案。(3)对加固后的模型进行模拟地震振动台试验,通过分析模型在不同抗震设防烈度下的结构破坏现象、动力特性的变化情况及加速度和位移的反应,对其加固措施的有效性进行评价。本文主要结论:从房屋模型制作过程看,本文所采用的土坯墙体的修复与加固改良方法简单有效,适宜于农村使用;通过模拟地震振动台试验,可以看出采用内外格栅配筋网加固后的土坯墙承重房屋,满足我国8度设防地区规范规定的“小震不坏、中震可修、大震不倒”的抗震设防要求。
[Abstract]:Because of its low strength of materials and the randomness of self-building by farmers in rural areas, the overall performance of adobe buildings is poor and the seismic performance is very fragile. In recent years, frequent earthquake disasters have occurred. As one of the main structural forms of traditional residential buildings, adobe wall bears heavy load, and the damage is very serious, resulting in a large number of casualties and property losses. It is of great practical significance to carry out simple, economical and effective seismic reinforcement and reconstruction of these dangerous houses in rural areas. In addition, due to the poor durability of adobe wall, different forms of cracking and denudation will occur in the normal service phase, which seriously affects its service life and building safety. How to adopt reasonable crack repair technology to increase durability of adobe wall bearing residential buildings is another purpose of this paper. The main contents of this paper are as follows: (1) based on the analysis of the basic causes of the weak seismic performance and the characteristics of earthquake damage of the native houses, two kinds of economy are put forward for the adobe building. Feasible reinforcement technology: the method of strengthening bearing adobe wall with inner and outer grille reinforcement net and strengthening retaining wall with groove. In view of the chemical reaction mechanism between loess and water glass in Northwest China, the method of repairing cracks in raw soil wall with water glass is put forward. (2) the model is made according to 1 / 2 scale of typical adobe wall bearing residential building. After the model is completed, the method of internal and external grid reinforcement is used to reinforce it. According to the similarity relation and the selected seismic wave, the detailed test loading scheme is determined. (3) the shaking table test of the reinforced model is carried out, and the failure phenomenon of the structure under different seismic fortification intensity is analyzed. The change of dynamic characteristics and the response of acceleration and displacement are evaluated to evaluate the effectiveness of the reinforcement measures. The main conclusions of this paper are as follows: from the process of building model making, the method of repairing and strengthening the adobe wall adopted in this paper is simple and effective and suitable for use in rural areas. It can be seen that the adobe wall bearing houses strengthened by internal and external grille reinforcement net can meet the requirements of seismic fortification of "small earthquake is not bad, medium earthquake is repairable, big earthquake is not collapsed" as stipulated in the code of 8 degree fortification area of our country.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU361;TU746.3
本文编号：2179992
[Abstract]:Because of its low strength of materials and the randomness of self-building by farmers in rural areas, the overall performance of adobe buildings is poor and the seismic performance is very fragile. In recent years, frequent earthquake disasters have occurred. As one of the main structural forms of traditional residential buildings, adobe wall bears heavy load, and the damage is very serious, resulting in a large number of casualties and property losses. It is of great practical significance to carry out simple, economical and effective seismic reinforcement and reconstruction of these dangerous houses in rural areas. In addition, due to the poor durability of adobe wall, different forms of cracking and denudation will occur in the normal service phase, which seriously affects its service life and building safety. How to adopt reasonable crack repair technology to increase durability of adobe wall bearing residential buildings is another purpose of this paper. The main contents of this paper are as follows: (1) based on the analysis of the basic causes of the weak seismic performance and the characteristics of earthquake damage of the native houses, two kinds of economy are put forward for the adobe building. Feasible reinforcement technology: the method of strengthening bearing adobe wall with inner and outer grille reinforcement net and strengthening retaining wall with groove. In view of the chemical reaction mechanism between loess and water glass in Northwest China, the method of repairing cracks in raw soil wall with water glass is put forward. (2) the model is made according to 1 / 2 scale of typical adobe wall bearing residential building. After the model is completed, the method of internal and external grid reinforcement is used to reinforce it. According to the similarity relation and the selected seismic wave, the detailed test loading scheme is determined. (3) the shaking table test of the reinforced model is carried out, and the failure phenomenon of the structure under different seismic fortification intensity is analyzed. The change of dynamic characteristics and the response of acceleration and displacement are evaluated to evaluate the effectiveness of the reinforcement measures. The main conclusions of this paper are as follows: from the process of building model making, the method of repairing and strengthening the adobe wall adopted in this paper is simple and effective and suitable for use in rural areas. It can be seen that the adobe wall bearing houses strengthened by internal and external grille reinforcement net can meet the requirements of seismic fortification of "small earthquake is not bad, medium earthquake is repairable, big earthquake is not collapsed" as stipulated in the code of 8 degree fortification area of our country.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU361;TU746.3
【参考文献】
相关期刊论文 前1条
1 赵成;阿肯江·托呼提;;生土建筑研究综述[J];四川建筑;2010年01期
，本文编号：2179992
本文链接：https://www.wllwen.com/jingjilunwen/jianzhujingjilunwen/2179992.html
