| 引用本文: | 路博,崔燕,方勇,王玉银,李豪.双壁波纹钢管混凝土构件短柱轴压力学性能[J].哈尔滨工业大学学报,2025,57(1):56.DOI:10.11918/202311039 |
| LU Bo,CUI Yan,FANG Yong,WANG Yuyin,LI Hao.Axial behavior of concrete-filled double-skin corrugated steel tubular columns[J].Journal of Harbin Institute of Technology,2025,57(1):56.DOI:10.11918/202311039 |
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| 双壁波纹钢管混凝土构件短柱轴压力学性能 |
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路博1,2,崔燕3,方勇1,2,王玉银1,2,李豪1,2
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(1.哈尔滨工业大学 土木工程学院,哈尔滨 150090; 2.结构工程灾变与控制教育部重点实验室(哈尔滨工业大学), 哈尔滨 150090; 3.深圳市市政设计研究院有限公司,广东 深圳 518029)
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| 摘要: |
| 为改善空心钢筋混凝土柱（HRC）的使用与受力性能,提出一种双壁波纹钢管混凝土（CFDCST）构件。本文共进行了4个大尺寸双壁波纹钢管混凝土短柱与2个空心钢筋混凝土短柱的轴压试验,关键试验参数为试件类型与波纹钢管类型。分析构件的破坏模式,对比不同参数下构件的承载力、峰值应变、延性系数等关键力学指标,获得荷载波纹钢管应变关系曲线以揭示试件的约束机理并验证外波纹钢管类型的影响。试验结果表明:外波纹钢管可为夹层混凝土提供约束作用,且螺旋角越小,外波纹钢管的约束作用越强；内波纹钢管则主要为夹层混凝土内壁提供有效支撑,以保持截面的完整性。名义约束效应系数与空心率相近时,由于咬口滑移影响,大螺旋角双壁波纹钢管混凝土比小螺旋角双壁波纹钢管混凝土的峰值应力、峰值应变与延性系数分别降低15.5%、21.8%与16.7%。在总用钢量相近的情况下,小螺旋角双壁波纹钢管混凝土柱的承载力、峰值应变与延性系数分别比空心钢筋混凝土柱提高10.6%、36.2%与50.0%。基于试验结果,检验了3种典型承载力公式的适用性,并提出了相应设计建议。 |
| 关键词: 组合结构 空心钢筋混凝土 波纹钢管 双壁构件 约束机理 |
| DOI：10.11918/202311039 |
| 分类号:TU398 |
| 文献标识码:A |
| 基金项目:深圳市市政设计研究院有限公司科技攻关项目(KT19001) |
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| Axial behavior of concrete-filled double-skin corrugated steel tubular columns |
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LU Bo1,2,CUI Yan3,FANG Yong1,2,WANG Yuyin1,2,LI Hao1,2
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(1.School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; 2.Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, China; 3.Shenzhen Municipal Design and Research Institute, Shenzhen 518029, Guangdong, China)
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| Abstract: |
| To enhance the service and mechanical performance of hollow reinforced concrete (HRC), this study introduces a novel composite column, named concrete-filled double-skin corrugated steel tube (CFDCST). This paper conducted a total of 4 large-size CFDCST short columns and 2 HRC short columns, and the main parameters of the test were the type of specimen and the type of outer corrugated steel tube (CST). The failure modes were analyzed and the key mechanical indicators such as the load-bearing capacity, peak strain, and ductility coefficient of the specimens under different parameters were compared and analyzed. The load-CST strain curves were obtained to reveal the confinement mechanism and verify the influence of the outer CST types. The results show that the outer CST can provide confinement to the sandwiched concrete and the smaller the helical angle, the larger the confinement effect. The inner CST primarily offers effective support for unconfined inner concrete wall to preserve the integrity of the cross-section. When the nominal confinement factor and the hollow ratio were basically similar, due to the slippage of the lock-seam, the peak stress, peak strain, and ductility coefficient of CFDCST columns with large helical angle were 15.5%, 21.8% and 16.7% lower than those of CFDCST columns with small helical angle, respectively. When the total steel ratio was basically similar, the load-bearing capacity, peak strain, and ductility coefficient of the CFDCST columns with small helical angle were 10.6%, 36.2% and 50.0% higher than those of HRC columns. Finally, based on the test results, the applicability of 3 typical bearing-capacity formulas was assessed and the corresponding design recommendations were given subsequently. |
| Key words: composite structure hollow reinforced concrete corrugated steel tube double-skin column confinement mechanism |
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