【摘要】：離心鋼管混凝土(CCFST)作為鋼管混凝土一個(gè)重要的分支,不但充分利用了鋼材和混凝土的材料特性,又彌補(bǔ)了兩種材料的缺陷,從而表現(xiàn)出優(yōu)良的力學(xué)性能。因此,CCFST構(gòu)件的抗壓力學(xué)性能研究具有重要意義。本文基于ABAQUS6.11有限元分析軟件,并結(jié)合相關(guān)的CCFST軸心受壓試驗(yàn),對(duì)CCFST構(gòu)件的抗壓性能進(jìn)行了相應(yīng)的研究分析。首先,采用具有代表性的四種實(shí)心鋼管混凝土材料本構(gòu)關(guān)系,建立與CCFST試驗(yàn)構(gòu)件尺寸相符的有限元模型。通過對(duì)比有限元計(jì)算結(jié)果與試驗(yàn)結(jié)果,分析得出四種實(shí)心鋼管混凝土材料本構(gòu)關(guān)系在CCFST分析中的適用范圍。其次,通過對(duì)軸心受壓CCFST進(jìn)行有限元模擬,研究鋼管壁厚、混凝土強(qiáng)度及空心率對(duì)其軸壓性能的影響。再次,通過偏心受壓CCFST進(jìn)行有限元分析,研究鋼管壁厚、偏心距及空心率對(duì)其偏壓性能的影響。最后,結(jié)合鋼管混凝土統(tǒng)一理論和實(shí)心鋼管混凝土偏壓承載力計(jì)算公式,推導(dǎo)出適用于CCFST偏壓承載力的計(jì)算公式。通過研究得出以下結(jié)論:不同的實(shí)心鋼管混凝土材料本構(gòu)模型對(duì)于CCFST分析適用范圍有所區(qū)別,Mander模型適用于圓形截面,劉威模型適用于方形截面,鐘善桐模型與韓林海模型對(duì)于圓形及方形截面均不適用;對(duì)于CCFST軸心力學(xué)性能的影響,鋼管壁厚影響較為明顯,混凝土強(qiáng)度影響較弱,空心率過大會(huì)明顯削弱CCFST的軸心受壓承載力,當(dāng)空心率減小到一定的值時(shí),空心率的進(jìn)一步減小,其承載力上升并不明顯;對(duì)于CCFST偏壓力學(xué)性能的影響,偏心距對(duì)承載力影響較為明顯,空心率的改變對(duì)承載力影響較弱,提高鋼管壁厚和減小空心率對(duì)離心鋼管混凝構(gòu)件的彈性剛度并無太大影響,但對(duì)構(gòu)件的延性具有一定影響,且提高鋼管壁厚對(duì)構(gòu)件延性提高幅度優(yōu)于降低空心率;本文所提出的CCFST偏壓承載力計(jì)算公式與數(shù)值分析結(jié)果具有良好的一致性。
[Abstract]:As an important branch of concrete-filled steel tube (CFST), centrifugal concrete-filled steel tube (CCFST) not only makes full use of the material characteristics of steel and concrete, but also makes up for the defects of the two materials, thus showing excellent mechanical properties. Therefore, it is of great significance to study the compressive mechanical properties of CCFST components. Based on the ABAQUS6.11 finite element analysis software and the related CCFST axial compression test, the compressive performance of CCFST members is studied and analyzed. Firstly, a finite element model which is consistent with the size of CCFST test member is established by using the constitutive relation of four typical solid concrete-filled steel tube materials. By comparing the finite element calculation results with the experimental results, the applicability of the constitutive relations of four kinds of solid concrete-filled steel tube materials in CCFST analysis is obtained. Secondly, the influence of steel tube wall thickness, concrete strength and heart rate on axial compression performance is studied by finite element simulation of axial compression CCFST. Thirdly, the influence of wall thickness, eccentricity and heart rate on the biasing performance of steel tube was studied by CCFST. Finally, based on the unified theory of concrete-filled steel tube (CFST) and the formula for calculating the eccentric bearing capacity of concrete filled steel tubular (CFST), a formula for calculating the bearing capacity of concrete filled steel tube (CCFST) is derived. The conclusions are as follows: different constitutive models of concrete-filled steel tubular materials are applicable to CCFST analysis, and Mander model is suitable for circular section, and Liu Wei model is suitable for square section. Zhong Shantong model and Hanninghai model are not suitable for circular and square sections, and for the influence of CCFST axial mechanical properties, the influence of steel tube wall thickness is obvious, and the influence of concrete strength is weak. The axial compression capacity of CCFST is obviously weakened by the empty heart rate overshoot. When the air heart rate decreases to a certain value, the empty heart rate decreases further and the bearing capacity does not increase obviously, and the effect on the mechanical properties of CCFST bias is not obvious. The influence of eccentricity on the bearing capacity is obvious, but the change of heart rate has a weak effect on the bearing capacity. Increasing the wall thickness of steel tube and reducing the air heart rate have no great effect on the elastic stiffness of the centrifugal steel tube coagulation member, but it has a certain effect on the ductility of the member. The increase of steel pipe wall thickness is better than that of reducing hollow ratio, and the calculation formula of CCFST bias load is in good agreement with the results of numerical analysis.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU398.9

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王宏偉;盧德輝;;基于統(tǒng)一理論的空心鋼管混凝土軸壓承載力計(jì)算[J];廣州大學(xué)學(xué)報(bào)(自然科學(xué)版);2011年01期

2 傅中秋;吉伯海;孫媛媛;胡正清;;鋼管輕集料混凝土偏心受壓構(gòu)件承載力分析[J];中南大學(xué)學(xué)報(bào)(自然科學(xué)版);2010年05期

3 傅中秋;吉伯海;馬麟;袁愛民;;偏心率對(duì)鋼管輕集料混凝土受壓性能的影響[J];東南大學(xué)學(xué)報(bào)(自然科學(xué)版);2010年03期

4 余志武;丁發(fā)興;;圓鋼管混凝土偏壓柱的力學(xué)性能[J];中國公路學(xué)報(bào);2008年01期

5 馬淑芳;郭紅香;趙均海;魏雪英;;復(fù)式鋼管混凝土偏壓柱試驗(yàn)[J];工業(yè)建筑;2007年12期

6 王宏偉;徐國林;鐘善桐;;空心率對(duì)空心鋼管混凝土軸壓短柱工作性能及承載力影響的研究[J];工程力學(xué);2007年10期

7 王宏偉;徐國林;鐘善桐;;空心鋼管混凝土長柱軸壓性能的試驗(yàn)研究[J];工業(yè)建筑;2006年12期

8 鐘善桐;徐國林;;空心鋼管混凝土軸壓構(gòu)件的工作性能[J];哈爾濱工業(yè)大學(xué)學(xué)報(bào);2006年09期

9 鐘善桐;徐國林;;空心鋼管混凝土軸心受壓構(gòu)件的工作性能和承載力[J];建筑鋼結(jié)構(gòu)進(jìn)展;2006年04期

10 陳寶春,陳友杰,王來永,韓林海;鋼管混凝土偏心受壓應(yīng)力-應(yīng)變關(guān)系模型研究[J];中國公路學(xué)報(bào);2004年01期

相關(guān)博士學(xué)位論文 前3條

1 劉威;鋼管混凝土局部受壓時(shí)的工作機(jī)理研究[D];福州大學(xué);2005年

2 袁偉斌;離心鋼管混凝土結(jié)構(gòu)設(shè)計(jì)理論基礎(chǔ)研究[D];浙江大學(xué);2005年

3 曲晨;離心鋼管混凝土結(jié)構(gòu)的扭轉(zhuǎn)性能與組合作用試驗(yàn)與理論研究[D];浙江大學(xué);2002年

相關(guān)碩士學(xué)位論文 前2條

1 黎玉婷;不同截面空實(shí)心鋼管混凝土軸壓和復(fù)雜靜力下統(tǒng)一理論的研究[D];哈爾濱工業(yè)大學(xué);2010年

2 遲力源;離心鋼管混凝土受力性能有限元分析[D];同濟(jì)大學(xué);2006年

，

本文編號(hào)：2251805