本文選題：中空夾層鋼管混凝土(CFDST) + 不銹鋼��； 參考：《太原理工大學(xué)》2017年碩士論文

【摘要】：中空夾層鋼管混凝土柱是在實(shí)心鋼管混凝土柱的基礎(chǔ)上發(fā)展起來的一種新型組合結(jié)構(gòu),其是由兩個(gè)同心的內(nèi)、外鋼管和鋼管夾層灌注混凝土而形成的構(gòu)件。中空夾層鋼管混凝土柱在擁有實(shí)心鋼管混凝土結(jié)構(gòu)優(yōu)點(diǎn)的基礎(chǔ)上,還具備自重輕、截面開展、抗彎剛度大的特點(diǎn)。雖然擁有諸多優(yōu)點(diǎn),但最外層鋼管耐腐蝕性較差,導(dǎo)致在實(shí)際工程中的運(yùn)用帶有局限性,如橋墩、海洋平臺結(jié)構(gòu)的支架柱以及灌注樁等對耐腐蝕性要求較高的重要結(jié)構(gòu)。不銹鋼因其擁有耐腐蝕性、耐高溫、強(qiáng)度高、延性好及維護(hù)費(fèi)用低等優(yōu)點(diǎn),故采用不銹鋼來代替普通碳素鋼可以大大改善其受力性能,從而出現(xiàn)一種新型鋼-混凝土組合結(jié)構(gòu),本文稱之為不銹鋼-混凝土-鋼管組合結(jié)構(gòu)。通過試驗(yàn)與有限元模擬相結(jié)合的方法,對不銹鋼-混凝土-鋼管組合柱的軸壓性能和偏壓性能分別展開了研究,主要內(nèi)容包括:(1)對24根不銹鋼-混凝土-鋼管組合柱的受力性能進(jìn)行了試驗(yàn)研究,其中,包括6根軸壓短柱和18根偏壓長柱。短柱以截面空心率為主要變化參數(shù),長柱以截面空心率、長細(xì)比、偏心率為主要變化參數(shù)。試驗(yàn)結(jié)果表明:對于軸壓短柱,隨截面空心率的增大,其軸壓極限承載力減小;對于偏壓長柱,隨長細(xì)比、空心率、偏心率的增加,其抗彎剛度和極限承載力降低。(2)將試驗(yàn)得到的軸壓極限承載力和偏壓極限承載力與按修正的《鋼管混凝土結(jié)構(gòu)技術(shù)規(guī)程》(DBJ13-51-2003)軸壓穩(wěn)定承載力和偏壓穩(wěn)定承載力設(shè)計(jì)公式計(jì)算值進(jìn)行對比分析,討論了利用修正的《鋼管混凝土結(jié)構(gòu)技術(shù)規(guī)程》軸壓穩(wěn)定承載力和偏壓穩(wěn)定承載力設(shè)計(jì)公式來指導(dǎo)不銹鋼-混凝土-鋼管組合柱工程設(shè)計(jì)的可行性。(3)在試驗(yàn)的基礎(chǔ)上,建立了不銹鋼-混凝土-鋼管組合柱的軸壓和壓彎受力性能有限元分析模型,在模型中引入構(gòu)件的整體幾何缺陷,將計(jì)算得到的荷載-位移曲線和極限承載力與試驗(yàn)結(jié)果對比。結(jié)果表明:其計(jì)算結(jié)果與試驗(yàn)結(jié)果吻合較好。(4)利用有限元模型,分析了整體幾何缺陷、空心率、混凝土強(qiáng)度、內(nèi)管徑厚比、偏心率對構(gòu)件承載力的影響。
[Abstract]:Hollow sandwich concrete-filled steel tubular column is a new type of composite structure developed on the basis of solid concrete-filled steel tube column. It is a member formed by two concentric inner and outer steel tubes and concrete-filled steel tube sandwich. The hollow sandwich concrete-filled steel tubular column has the advantages of solid concrete-filled steel tubular structure, light weight, section development and large flexural stiffness. Although it has many advantages, the outermost steel pipe has poor corrosion resistance, which leads to the limitation of its application in practical engineering, such as bridge piers, supporting columns of offshore platform structures and cast-in-place piles, which are important structures with high corrosion resistance. Because stainless steel has the advantages of corrosion resistance, high temperature resistance, high strength, good ductility and low maintenance cost, the mechanical properties of stainless steel can be greatly improved by using stainless steel instead of ordinary carbon steel, thus a new steel-concrete composite structure appears. This paper is called stainless steel-concrete-steel pipe composite structure. In this paper, the axial compression behavior and the partial compression performance of the stainless steel concrete-steel pipe composite column are studied by means of the combination of test and finite element simulation. The mechanical properties of 24 stainless steel concrete-steel pipe composite columns are studied including 6 short columns under axial compression and 18 long columns with partial compression. The main variation parameters of the short column are the hollow ratio of the section, the ratio of the length to the diameter and the eccentricity of the long column. The experimental results show that the ultimate bearing capacity decreases with the increase of the hollow ratio of the axial compression column, and increases with the increase of the slenderness ratio, the empty heart rate and the eccentricity of the long column. Its flexural stiffness and ultimate bearing capacity are reduced. 2) the axial compression ultimate bearing capacity and the eccentric compression ultimate bearing capacity obtained from the test are compared with the modified concrete filled Steel Tubular structure Technical Specification / DBJ13-51-2003) the axial compression stability bearing capacity and the eccentric compressive stability bearing capacity are designed. The calculated values of the formula are compared and analyzed. This paper discusses the feasibility of guiding the engineering design of stainless steel concrete-steel tube composite columns by using the revised design formula of axial compression stable bearing capacity and eccentric compressive stability bearing capacity of concrete filled steel tube structure. On the basis of the experiment, the paper discusses the feasibility of designing stainless steel concrete-steel tube composite columns. The finite element analysis model of axial compression and bending behavior of stainless steel concrete-steel pipe composite columns is established. The integral geometric defects of members are introduced into the model. The calculated load-displacement curve and ultimate bearing capacity are compared with the experimental results. The results show that the calculated results are in good agreement with the experimental results. (4) by using the finite element model, the effects of geometric defects, heart rate, concrete strength, diameter to thickness ratio and eccentricity on the bearing capacity of the members are analyzed.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU398.9

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 沈蔚;劉文淵;段文峰;冷捷;周成;;不銹鋼管混凝土研究及應(yīng)用[J];吉林建筑大學(xué)學(xué)報(bào);2016年03期

2 劉曉;鮑俊濤;王兵;;高溫后方中空夾層鋼管混凝土柱滯回性能研究[J];鐵道科學(xué)與工程學(xué)報(bào);2016年03期

3 劉曉;麻路;王兵;;高溫后中空夾層鋼管混凝土柱軸壓性能研究[J];鐵道科學(xué)與工程學(xué)報(bào);2014年05期

4 任慶新;呂艷波;賈連光;默亞卿;;帶端板圓錐形中空夾層鋼管混凝土短柱軸向局壓力學(xué)性能研究[J];工業(yè)建筑;2013年04期

5 陳譽(yù);李鳳霞;王江;;熱成型不銹鋼圓管混凝土軸壓短柱受力性能試驗(yàn)研究[J];建筑結(jié)構(gòu)學(xué)報(bào);2013年02期

6 張棟;劉清;劉耘;;圓中空夾層鋼管混凝土抗彎承載力分析[J];低溫建筑技術(shù);2012年12期

7 黃宏;楊建;張安哥;陳夢成;;方中空夾層鋼管混凝土純扭力學(xué)性能研究[J];廣西大學(xué)學(xué)報(bào)(自然科學(xué)版);2012年04期

8 宮永麗;查曉雄;;新型金屬管混凝土柱力學(xué)性能研究Ⅱ:軸壓長柱穩(wěn)定系數(shù)的研究[J];建筑鋼結(jié)構(gòu)進(jìn)展;2012年03期

9 查曉雄;宮永麗;;新型金屬管混凝土柱力學(xué)性能研究Ⅰ:軸壓短柱強(qiáng)度承載力的研究[J];建筑鋼結(jié)構(gòu)進(jìn)展;2012年03期

10 王元清;袁煥鑫;石永久;高博;戴國欣;;不銹鋼結(jié)構(gòu)的應(yīng)用和研究現(xiàn)狀[J];鋼結(jié)構(gòu);2010年02期

相關(guān)碩士學(xué)位論文 前2條

1 胡成璽;不銹鋼管混凝土柱承載力分析[D];西安建筑科技大學(xué);2010年

2 曾祺;中空夾層鋼管混凝土的軸心受壓研究[D];浙江大學(xué);2009年

，

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