【摘要】：由于河砂資源的短缺,使得開發(fā)海砂資源用于建筑當(dāng)中變得非常有意義。在實(shí)心不銹鋼管混凝土中,一方面由于不銹鋼管本身有較好的抗腐蝕性能,另一方面,實(shí)心不銹鋼管混凝土構(gòu)件,其核心混凝土處于密閉的環(huán)境中,這種特殊的環(huán)境也可能限制了海砂對不銹鋼管的腐蝕。這使得把海砂不需經(jīng)過處理,直接應(yīng)用到不銹鋼管混凝土中,從而應(yīng)用于工程實(shí)際的研究變得非常有意義。本文從試驗(yàn)和理論兩方面研究了方形不銹鋼管海砂混凝土柱在偏心受壓作用下的力學(xué)性能、工作機(jī)理和參數(shù)分析。具體進(jìn)行了以下幾個(gè)方面的工作:1、綜述了國內(nèi)外關(guān)于不銹鋼結(jié)構(gòu)、不銹鋼管混凝土結(jié)構(gòu)和海砂混凝土結(jié)構(gòu)的試驗(yàn)和理論研究現(xiàn)狀,指出了本課題研究的意義以及研究的方法和內(nèi)容。2、進(jìn)行了一系列方形不銹鋼管海砂混凝土偏壓試件的試驗(yàn)研究,包括:14根方形截面不銹鋼管混凝土試件、28根方形截面不銹鋼管海砂混凝土偏壓試件。主要參數(shù)為:偏心率、長細(xì)比、核心混凝土強(qiáng)度和核心混凝土細(xì)骨料類型。實(shí)驗(yàn)結(jié)果表明:在本文研究條件下,原狀海砂可以代替凈化海砂及河砂充當(dāng)不銹鋼管混凝土偏壓試件核心混凝土的細(xì)骨料;試件在偏心受壓荷載作用下的極限承載力隨著偏心率和長細(xì)比的增加而降低。3、利用現(xiàn)有規(guī)范對方形不銹鋼管海砂混凝土試件承載力進(jìn)行計(jì)算,驗(yàn)證了用現(xiàn)有普通鋼管混凝土設(shè)計(jì)規(guī)范計(jì)算方形不銹鋼管海砂混凝土偏壓試件承載力的可行性,計(jì)算結(jié)果表明:用現(xiàn)有普通鋼管混凝土規(guī)范計(jì)算不銹鋼管海砂混凝土偏壓試件承載力得出的結(jié)果相對安全。4、利用河砂混凝土的本構(gòu)模型建立了方形不銹鋼管海砂混凝土偏壓試件的有限元模型,對計(jì)算得出的偏壓試件的工作機(jī)理和不同參數(shù)對荷載-跨中撓度關(guān)系曲線的影響進(jìn)行分析,模擬結(jié)果與試驗(yàn)結(jié)果吻合良好。有限元模擬結(jié)果表明:用河砂混凝土的本構(gòu)模型模擬凈化和原狀海砂混凝土偏壓試件進(jìn)行有限元分析也能取得較好的計(jì)算精度。
[Abstract]:Because of the shortage of river sand resources, it is very meaningful to develop sea sand resources for construction. In the solid stainless steel tube concrete, on the one hand, due to the good corrosion resistance of the stainless steel tube itself, on the other hand, the core concrete of the solid stainless steel tube concrete member is in a closed environment. This particular environment may also limit the corrosion of sea sand to stainless steel tubes. This makes it very meaningful to apply sea sand directly to concrete filled stainless steel tubes without treatment. In this paper, the mechanical properties, working mechanism and parameter analysis of square stainless steel tube sea sand concrete columns under eccentric compression are studied from both experimental and theoretical aspects. In this paper, the following work is carried out in the following aspects: 1. The experimental and theoretical research status of stainless steel structure, stainless steel tube concrete structure and sea sand concrete structure at home and abroad is summarized. The significance of the research, the method and content of the research are pointed out. A series of test specimens of square stainless steel tube sea sand concrete are studied. There are 14 square section concrete filled stainless steel tube specimens and 28 square section stainless steel tube sea sand concrete eccentric compression specimens. The main parameters are eccentricity, aspect ratio, core concrete strength and core concrete fine aggregate type. The experimental results show that the undisturbed sea sand can replace the purified sea sand and the river sand as the fine aggregate of the core concrete of stainless steel tube concrete eccentric compression specimen under the condition of the research in this paper. The ultimate bearing capacity of the specimen under eccentric compressive loading decreases with the increase of eccentricity and slenderness ratio. The bearing capacity of square stainless steel tube sea sand concrete specimen is calculated by using existing codes. The feasibility of calculating the bearing capacity of square stainless steel tube sea sand concrete eccentric compression specimen with the existing design code of ordinary concrete-filled steel tube is verified. The results show that it is relatively safe to calculate the bearing capacity of stainless steel tube sea sand concrete by using the existing code of ordinary steel tube concrete, and the square stainless steel tube sea sand is established by using the constitutive model of river sand concrete. Finite element model of concrete eccentric compression specimen, The working mechanism and the influence of different parameters on the load-span deflection curve are analyzed. The simulation results are in good agreement with the experimental results. The results of finite element simulation show that the simulation of purification with constitutive model of river sand concrete and the finite element analysis of undisturbed sea sand concrete under partial compression can also obtain good calculation accuracy.
【學(xué)位授予單位】：福建農(nóng)林大學(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 史艷莉;車向龍;王景玄;;內(nèi)配工字型鋼的矩形鋼管混凝土雙向偏壓構(gòu)件參數(shù)分析[J];工程力學(xué);2015年S1期

2 劉偉;謝友均;董必欽;邢鋒;;海砂特性及海砂混凝土力學(xué)性能的研究[J];硅酸鹽通報(bào);2014年01期

3 徐勇;張士宏;程明;宋鴻武;王蘇程;;加載方式對奧氏體不銹鋼力學(xué)性能和馬氏體相變的影響[J];金屬學(xué)報(bào);2013年07期

4 舒贛平;鄭寶鋒;沈曉明;;不銹鋼軸心受壓構(gòu)件穩(wěn)定承載能力計(jì)算方法研究[J];工業(yè)建筑;2012年05期

5 李華鋼;蔡健;;帶約束拉桿矩形鋼管混凝土短柱承載力計(jì)算[J];混凝土與水泥制品;2012年03期

6 卞立波;宋少民;李飛;;海砂混凝土耐久性能研究[J];混凝土與水泥制品;2012年02期

7 寧博;歐陽東;溫喜廉;;利用海砂制備高性能混凝土試驗(yàn)研究[J];混凝土;2012年01期

8 徐亞豐;孫鵬舉;O.E.Sysoev;Dzyuba Victo;;碳纖維鋼骨-鋼管混凝土柱雙向偏壓有限元分析[J];沈陽建筑大學(xué)學(xué)報(bào)(自然科學(xué)版);2011年06期

9 鄭津洋;李雅嫻;徐平;馬利;繆存堅(jiān);;應(yīng)變強(qiáng)化用奧氏體不銹鋼力學(xué)性能影響因素[J];解放軍理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2011年05期

10 趙同峰;歐陽偉;李冬松;;方鋼管鋼骨混凝土雙偏壓柱試驗(yàn)研究與有限元分析[J];建筑結(jié)構(gòu);2011年08期

相關(guān)會議論文 前1條

1 查曉雄;宮永麗;;不銹鋼管混凝土軸壓性能試驗(yàn)和有限元分析[A];'2011全國鋼結(jié)構(gòu)學(xué)術(shù)年會論文集[C];2011年

相關(guān)碩士學(xué)位論文 前5條

1 黃海清;新型不銹鋼管混凝土柱雙向偏壓力學(xué)性能研究[D];福建農(nóng)林大學(xué);2016年

2 高磊;新型中空夾層混凝土組合結(jié)構(gòu)偏壓性能的試驗(yàn)和理論研究[D];太原理工大學(xué);2015年

3 黃敘;圓鋼管混凝土軸壓短柱分析與研究[D];湖南大學(xué);2012年

4 倉友清;基于統(tǒng)一理論鋼管-GFRP-海砂混凝土柱軸壓和抗震性能研究[D];哈爾濱工業(yè)大學(xué);2010年

5 農(nóng)瑞;海砂混凝土結(jié)構(gòu)構(gòu)件力學(xué)性能的試驗(yàn)研究[D];哈爾濱工業(yè)大學(xué);2008年

，

本文編號：2203436