扣件式满堂钢管脚手架试验及设计方法研究
发布时间：2018-08-18 20:26
【摘要】：目前,随着我国经济飞速发展,全国各地都在开展大规模的土木工程建设。扣件式满堂钢管脚手架凭借其构造简单、灵活,维护简便、部件的通用性强等优点在工程建设中得到了广泛的应用。而随着地上部分建设的日益饱和,人们逐步把目光投入到地下空间中。由于地下工程往往空间狭小,故施工过程中所使用的都是高宽比较小的扣件式满堂钢管脚手架,且脚手架周边通常会有墙体约束。而目前我国现行规范《建筑施工扣件式钢管脚手架安全技术规范》JGJ130-2011中有关高宽比较小的扣件式满堂钢管脚手架的设计方面的内容并不完善,不能给实际使用提供充分的参考作用,故有必要对高宽比较小或有连墙件的扣件式满堂钢管脚手架进行系统的试验研究,从而为将来规范的修订提供科学的依据。本文以扣件式满堂钢管脚手架为研究对象,首先对传统扣件式满堂钢管脚手架进行优化设计研究,提出了一种顶层加强型的扣件式满堂钢管脚手架。并在此基础上,对扣件式满堂钢管脚手架展开了立杆间距、水平杆步距、高宽比、剪刀撑搭设方式、连墙件设置方式、扣件扭紧力矩、钢管壁厚、顶层搭设方式以及加载范围等不同搭设参数下的18组足尺试验研究,并对其承载力、破环形态以及杆件应力等进行分析研究。在试验结果的基础上,对扣件式满堂钢管脚手架的设计方法进行研究。根据高宽比不同,对扣件式满堂钢管脚手架临界荷载进行分类;并结合现行规范及相关文献中的结论,对扣件式满堂钢管脚手架临界荷载进行合理的调整及推广。根据所推出的不同搭设参数的脚手架的临界荷载值,对各种搭设参数所对应的立杆计算长度系数μ进行推导。
[Abstract]:At present, with the rapid development of our economy, large-scale civil engineering construction is being carried out all over the country. With the advantages of simple structure, flexibility, easy maintenance and strong versatility of components, the fastener scaffolding has been widely used in engineering construction. With the increasing saturation of the above-ground construction, people gradually put their eyes into the underground space. Because the space of underground engineering is often narrow, the construction process is used in the construction of small fastener scaffolding, and the scaffolding usually has wall constraints around the scaffold. At present, the current code of our country < Technical Code for Safety of Steel Tube scaffolding with fastener Type in Building Construction > JGJ130-2011 is not perfect in the design of fastener type scaffolding of steel tube with small height and small width. It is necessary to carry out systematic experimental study on the fastener type scaffold of steel tube with small height and width or even wall so as to provide a scientific basis for the revision of the code in the future. In this paper, the scaffolding of fastener type full steel tube is taken as the research object. Firstly, the optimization design of the traditional fastener type full hall steel tube scaffold is studied, and a kind of top-level reinforced full steel tube scaffold is put forward. On this basis, the distance between stand, the step distance of horizontal pole, the ratio of height to width, the way of setting up scissors braces, the setting mode of connecting wall, the torsion moment of fastener, the thickness of steel pipe wall are carried out for fastener type full hall steel tube scaffolding. In this paper, 18 groups of full-scale experimental studies are carried out under different setting parameters, such as the setting mode and loading range of the top floor, and the bearing capacity, the shape of the broken ring and the stress of the member are analyzed and studied. On the basis of experimental results, the design method of fastener type scaffolding of steel tube is studied. According to the different aspect ratio, the critical load of fastener type full steel tube scaffolding is classified, and the critical load of fastener full hall steel tube scaffold is adjusted and popularized reasonably according to the current code and the conclusions of relevant literature. According to the critical load values of scaffolding with different erection parameters, the calculated length coefficient 渭 of various erection parameters is deduced.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU731.2
[Abstract]:At present, with the rapid development of our economy, large-scale civil engineering construction is being carried out all over the country. With the advantages of simple structure, flexibility, easy maintenance and strong versatility of components, the fastener scaffolding has been widely used in engineering construction. With the increasing saturation of the above-ground construction, people gradually put their eyes into the underground space. Because the space of underground engineering is often narrow, the construction process is used in the construction of small fastener scaffolding, and the scaffolding usually has wall constraints around the scaffold. At present, the current code of our country < Technical Code for Safety of Steel Tube scaffolding with fastener Type in Building Construction > JGJ130-2011 is not perfect in the design of fastener type scaffolding of steel tube with small height and small width. It is necessary to carry out systematic experimental study on the fastener type scaffold of steel tube with small height and width or even wall so as to provide a scientific basis for the revision of the code in the future. In this paper, the scaffolding of fastener type full steel tube is taken as the research object. Firstly, the optimization design of the traditional fastener type full hall steel tube scaffold is studied, and a kind of top-level reinforced full steel tube scaffold is put forward. On this basis, the distance between stand, the step distance of horizontal pole, the ratio of height to width, the way of setting up scissors braces, the setting mode of connecting wall, the torsion moment of fastener, the thickness of steel pipe wall are carried out for fastener type full hall steel tube scaffolding. In this paper, 18 groups of full-scale experimental studies are carried out under different setting parameters, such as the setting mode and loading range of the top floor, and the bearing capacity, the shape of the broken ring and the stress of the member are analyzed and studied. On the basis of experimental results, the design method of fastener type scaffolding of steel tube is studied. According to the different aspect ratio, the critical load of fastener type full steel tube scaffolding is classified, and the critical load of fastener full hall steel tube scaffold is adjusted and popularized reasonably according to the current code and the conclusions of relevant literature. According to the critical load values of scaffolding with different erection parameters, the calculated length coefficient 渭 of various erection parameters is deduced.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU731.2
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