【摘要】：目前,隨著我國(guó)經(jīng)濟(jì)飛速發(fā)展,全國(guó)各地都在開展大規(guī)模的土木工程建設(shè)�？奂綕M堂鋼管腳手架憑借其構(gòu)造簡(jiǎn)單、靈活,維護(hù)簡(jiǎn)便、部件的通用性強(qiáng)等優(yōu)點(diǎn)在工程建設(shè)中得到了廣泛的應(yīng)用。而隨著地上部分建設(shè)的日益飽和,人們逐步把目光投入到地下空間中。由于地下工程往往空間狹小,故施工過程中所使用的都是高寬比較小的扣件式滿堂鋼管腳手架,且腳手架周邊通常會(huì)有墻體約束。而目前我國(guó)現(xiàn)行規(guī)范《建筑施工扣件式鋼管腳手架安全技術(shù)規(guī)范》JGJ130-2011中有關(guān)高寬比較小的扣件式滿堂鋼管腳手架的設(shè)計(jì)方面的內(nèi)容并不完善,不能給實(shí)際使用提供充分的參考作用,故有必要對(duì)高寬比較小或有連墻件的扣件式滿堂鋼管腳手架進(jìn)行系統(tǒng)的試驗(yàn)研究,從而為將來規(guī)范的修訂提供科學(xué)的依據(jù)。本文以扣件式滿堂鋼管腳手架為研究對(duì)象,首先對(duì)傳統(tǒng)扣件式滿堂鋼管腳手架進(jìn)行優(yōu)化設(shè)計(jì)研究,提出了一種頂層加強(qiáng)型的扣件式滿堂鋼管腳手架。并在此基礎(chǔ)上,對(duì)扣件式滿堂鋼管腳手架展開了立桿間距、水平桿步距、高寬比、剪刀撐搭設(shè)方式、連墻件設(shè)置方式、扣件扭緊力矩、鋼管壁厚、頂層搭設(shè)方式以及加載范圍等不同搭設(shè)參數(shù)下的18組足尺試驗(yàn)研究,并對(duì)其承載力、破環(huán)形態(tài)以及桿件應(yīng)力等進(jìn)行分析研究。在試驗(yàn)結(jié)果的基礎(chǔ)上,對(duì)扣件式滿堂鋼管腳手架的設(shè)計(jì)方法進(jìn)行研究。根據(jù)高寬比不同,對(duì)扣件式滿堂鋼管腳手架臨界荷載進(jìn)行分類;并結(jié)合現(xiàn)行規(guī)范及相關(guān)文獻(xiàn)中的結(jié)論,對(duì)扣件式滿堂鋼管腳手架臨界荷載進(jìn)行合理的調(diào)整及推廣。根據(jù)所推出的不同搭設(shè)參數(shù)的腳手架的臨界荷載值,對(duì)各種搭設(shè)參數(shù)所對(duì)應(yīng)的立桿計(jì)算長(zhǎng)度系數(shù)μ進(jìn)行推導(dǎo)。
[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.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU731.2

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本文編號(hào)：2190581