王宇航, 聂建国, 樊健生. 矩形钢管混凝土柱在扭矩作用下的截面剪应变场研究[J]. 工程力学, 2014, 31(5): 101-108. DOI: 10.6052/j.issn.1000-4750.2012.10.0789
引用本文: 王宇航, 聂建国, 樊健生. 矩形钢管混凝土柱在扭矩作用下的截面剪应变场研究[J]. 工程力学, 2014, 31(5): 101-108. DOI: 10.6052/j.issn.1000-4750.2012.10.0789
WANG Yu-hang, NIE Jian-guo, FAN Jian-sheng. CROSS SECTIONAL SHEAR STRAIN DISTRIBUTION OF RECTANGULAR CONCRETE FILLED STEEL TUBE COLUMNS SUBJECTED TO TORSION[J]. Engineering Mechanics, 2014, 31(5): 101-108. DOI: 10.6052/j.issn.1000-4750.2012.10.0789
Citation: WANG Yu-hang, NIE Jian-guo, FAN Jian-sheng. CROSS SECTIONAL SHEAR STRAIN DISTRIBUTION OF RECTANGULAR CONCRETE FILLED STEEL TUBE COLUMNS SUBJECTED TO TORSION[J]. Engineering Mechanics, 2014, 31(5): 101-108. DOI: 10.6052/j.issn.1000-4750.2012.10.0789

矩形钢管混凝土柱在扭矩作用下的截面剪应变场研究

CROSS SECTIONAL SHEAR STRAIN DISTRIBUTION OF RECTANGULAR CONCRETE FILLED STEEL TUBE COLUMNS SUBJECTED TO TORSION

  • 摘要: 对矩形截面钢管混凝土柱在纯扭和压扭荷载作用下的滞回性能进行了试验研究, 得到了矩形截面钢管混凝土柱的扭矩-扭转角滞回曲线。基于材料力学基本原理建立了纤维梁截面扭率和纤维剪应变间的关系, 进而对矩形截面钢管混凝土柱在扭矩作用下的截面剪应变场分布规律进行了分析, 并建立了三维精细有限元模型进行精度验证, 最后给出了钢管混凝土柱截面扭率和截面纤维剪应变间关系的矩阵表达, 引入了考虑扭转效应的纤维梁模型, 使该模型能够用于分析矩形截面钢管混凝土柱在扭矩作用下的非线性反应。与试验结果的对比表明, 考虑扭转效应的纤维梁模型在分析矩形截面往复扭矩荷载作用下的受力行为时具有较高的求解精度和求解效率, 可为分析不同类型结构体系在地震复杂受力状态下的动力反应提供依据。

     

    Abstract: Tests on concrete filled steel tube columns with rectangular section subjected to pure torsion and compression-torsion were carried out, and the hysteretic curves of torsion moment versus rotational angle were obtained. Based on the principles of material mechanics, the relations between the torsion curvature of the section and the shear strain of the fiber at the section were established. Then the cross sectional strain distribution at the rectangular section of concrete filled steel tube columns was analyzed. The three-dimensional refined finite element model was also built for purpose of verification. At last, the matrix forms of the relations between the torsion curvature of the section and the shear strain of the fiber at the section were derived and introduced into the fiber beam model considering torsion effect. The comparison between the test results and calculation results shows that the fiber beam model considering torsion effect has high modeling efficiency and accuracy for predicting the torsion behavior of concrete filled steel tube columns with rectangular section, and is suitable for analyzing the dynamic response of structures subjected the combined cyclic loads due to earthquake excitations.

     

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