氯離子腐蝕環(huán)境下鋼管混凝土軸拉構件受力性能研究
發(fā)布時間:2019-03-03 11:15
【摘要】:該文建立了用以研究鋼管混凝土在長期軸拉荷載與氯離子腐蝕共同作用下力學性能的有限元模型。模型中考慮了長期荷載下混凝土的收縮徐變以及惡劣環(huán)境導致的鋼管腐蝕的影響,模型計算結果得到試驗數(shù)據(jù)的驗證。利用建立的有限元分析模型,研究了長期荷載與腐蝕對鋼管混凝土承載能力的影響,并與空鋼管進行了對比,同時對組合截面材料間內(nèi)力重分布的規(guī)律進行了分析,明晰了其受力全過程的工作機理。
[Abstract]:In this paper, a finite element model is established to study the mechanical properties of concrete-filled steel tube (CFST) under long-term axial tensile load and chloride ion corrosion. The effect of shrinkage and creep of concrete under long-term load and corrosion of steel tube caused by harsh environment are considered in the model. The calculated results of the model are verified by the experimental data. Based on the established finite element analysis model, the influence of long-term load and corrosion on the bearing capacity of concrete-filled steel tube (CFST) is studied and compared with that of empty steel tube. At the same time, the law of internal force and weight distribution among composite cross-section materials is analyzed. The working mechanism of the whole process is clarified.
【作者單位】: 清華大學土木工程系;
【基金】:國家自然科學基金項目(51178245)
【分類號】:TU398.9
[Abstract]:In this paper, a finite element model is established to study the mechanical properties of concrete-filled steel tube (CFST) under long-term axial tensile load and chloride ion corrosion. The effect of shrinkage and creep of concrete under long-term load and corrosion of steel tube caused by harsh environment are considered in the model. The calculated results of the model are verified by the experimental data. Based on the established finite element analysis model, the influence of long-term load and corrosion on the bearing capacity of concrete-filled steel tube (CFST) is studied and compared with that of empty steel tube. At the same time, the law of internal force and weight distribution among composite cross-section materials is analyzed. The working mechanism of the whole process is clarified.
【作者單位】: 清華大學土木工程系;
【基金】:國家自然科學基金項目(51178245)
【分類號】:TU398.9
【參考文獻】
相關期刊論文 前3條
1 ;軸向拉伸作用下鋼管混凝土的性能分析[J];鋼結構;2011年11期
2 ;長期持續(xù)荷載下中空鋼管混凝土(CFDST)柱的研究[J];鋼結構;2011年12期
3 混凝土收縮與徐變專題協(xié)作組;混凝土收縮與徐變實用數(shù)學表達式的試驗研究[J];建筑科學;1987年03期
【共引文獻】
相關期刊論文 前10條
1 王志新;劉立;;輕集料混凝土干燥收縮特征的研究[J];粉煤灰;2011年02期
2 馮守中,王U,
本文編號:2433647
本文鏈接:http://sikaile.net/guanlilunwen/chengjian/2433647.html
教材專著