甘丹, 周泉霖, 闫标, 岳孟谣. 柱中设缝的方钢管约束型钢混凝土中长柱受压性能研究[J]. 工程力学, 2023, 40(9): 161-171. DOI: 10.6052/j.issn.1000-4750.2022.01.0058
引用本文: 甘丹, 周泉霖, 闫标, 岳孟谣. 柱中设缝的方钢管约束型钢混凝土中长柱受压性能研究[J]. 工程力学, 2023, 40(9): 161-171. DOI: 10.6052/j.issn.1000-4750.2022.01.0058
GAN Dan, ZHOU Quan-lin, YAN Biao, YUE Meng-yao. RESEARCH ON THE COMPRESSION BEHAVIOR OF SQUARE TUBED REINFORCED CONCRETE SLENDER COLUMN WITH ADDITIONAL GAP[J]. Engineering Mechanics, 2023, 40(9): 161-171. DOI: 10.6052/j.issn.1000-4750.2022.01.0058
Citation: GAN Dan, ZHOU Quan-lin, YAN Biao, YUE Meng-yao. RESEARCH ON THE COMPRESSION BEHAVIOR OF SQUARE TUBED REINFORCED CONCRETE SLENDER COLUMN WITH ADDITIONAL GAP[J]. Engineering Mechanics, 2023, 40(9): 161-171. DOI: 10.6052/j.issn.1000-4750.2022.01.0058

柱中设缝的方钢管约束型钢混凝土中长柱受压性能研究

RESEARCH ON THE COMPRESSION BEHAVIOR OF SQUARE TUBED REINFORCED CONCRETE SLENDER COLUMN WITH ADDITIONAL GAP

  • 摘要: 钢管约束混凝土柱的钢管通常在柱端设缝以使其不直接承受荷载。该文主要对两种设缝模式的方钢管约束型钢混凝土柱(仅柱两端设缝、柱两端和柱中均设缝)的受力性能进行分析对比。以钢管宽厚比、荷载偏心率为主要变化参数,对柱中设缝的方钢管约束型钢混凝土中长柱进行了受压力学性能试验。分析对比了各组试件的破坏模式、承载能力及钢管应力发展规律,结果表明:设缝模式对试件破坏形态无明显影响,柱中设缝试件的轴压承载力略有提高,而偏压承载力呈降低趋势。采用精细化的有限元模型进行了参数分析,依据试验及有限元结果,提出用于计算构件弯矩增大效应的刚度折减系数公式,进而建立柱中设缝构件偏压作用下的承载力计算方法。

     

    Abstract: For a tubed concrete column, the tube gaps are usually arranged at the column ends to avoid the steel tube carrying loads directly. Two type square tubed steel reinforced concrete (TSRC) columns, i.e., a column with two gaps at the column ends and another column with an additional gap at the mid-height, are discussed in this paper. Experimental studies on the compression behavior of TSRC slender columns were conducted to investigate the effects of the width-to-thickness ratio of steel tube and the load eccentricity ratio. The failure modes, the ultimate strengths, and the load to tube stress curves were analyzed. The results indicated that the two type columns shown similar failure modes. The axial strength of column with additional gap at the mid-height was slightly higher than that of column with two gaps, while the eccentric strength of column exhibited opposite tendency. Parametric analysis were carried out based on the precise finite element (FE) models. Based on the test and FE results, the stiffness reduction coefficient to calculate the moment amplification effect was proposed by regression analysis, and the design method of square TSRC column with additional gap at the mid-height under eccentric compression was proposed.

     

/

返回文章
返回