Factors Influencing Bond Properties in Concrete Encased Steel Columns at High Temperatures

Yuzhuo Wang; Ziqing Liu; Guoqiang Li; Jian Jiang; Ying Gao; Chuanguo Fu

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Factors Influencing Bond Properties in Concrete Encased Steel Columns at High Temperatures

机译：影响混凝土中粘合性能的因素在高温下封装钢柱

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This paper presents experimental results on factors governing the bond strength between steel and concrete in concrete encased steel (CES) columns at high temperatures. Push-out tests were conducted on 22 CES specimens to investigate the bond strength between concrete and steel under the temperature of 250 °C, while one specimen was tested at room temperatures for comparison. Data obtained from these tests revealed that the bond properties of CES structures between steel and concrete is influenced by a number of factors, including concrete strength, concrete cover thickness, stirrup reinforcement ratio, steel ratio and anchorage length of steel at high temperatures. The formulas for predicting the ultimate bond strength and slip between steel and concrete of CES structures are proposed based on the experimental investigations.

机译：本文介绍了在高温下混凝土钢（CES）柱中钢和混凝土粘接强度的因素的实验结果。在22个CES标本上进行推出试验，以研究混凝土和钢之间的粘合强度，在250℃的温度下，在室温下测试一个样品进行比较。从这些测试中获得的数据显示，钢和混凝土之间CES结构的粘合性能受到许多因素的影响，包括在高温下钢的混凝土强度，混凝土覆盖厚度，钢比和锚固长度。基于实验研究，提出了预测CES结构钢和混凝土之间的最终粘合强度和滑动的公式。

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来源
《International journal of steel structures》 |2020年第3期|1040-1051|共12页
作者
Yuzhuo Wang; Ziqing Liu; Guoqiang Li; Jian Jiang; Ying Gao; Chuanguo Fu;
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作者单位

College of Civil Engineering Shandong Jianzhu University Jinan 250101 Shandong Province People's Republic of China;

College of Civil Engineering Shandong Jianzhu University Jinan 250101 Shandong Province People's Republic of China;

College of Civil Engineering Shandong Jianzhu University Jinan 250101 Shandong Province People's Republic of China State Key Laboratory for Disaster Reduction in Civil Engineering Tongji University Shanghai 200092 People's Republic of China;

School of Mechanics and Civil Engineering China University of Mining and Technology Xuzhou 221116 People's Republic of China;

College of Engineering Shandong Xiehe University Jinan 250101 Shandong Province People's Republic of China;

College of Civil Engineering Shandong Jianzhu University Jinan 250101 Shandong Province People's Republic of China;

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原文格式 PDF
正文语种 eng
中图分类
关键词
Concrete encased steel column; Bond property; Push-out test; High temperature;

机译：混凝土包裹钢柱;债券财产;推出测试;高温;

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专利

1. Experimental and numerical study of temperature developments of composite joints between concrete-encased concrete-filled steel tube columns and reinforced concrete beams [J] . Zhou Kan, Han Lin-Hai Fire Safety Journal . 2020,第Sepa期

机译：混凝土混凝土钢管柱和钢筋混凝土梁复合接头温度发展的实验与数值研究
2. Cyclic Loading Test for Beam-Column Connections of Concrete-Filled U-Shaped Steel Beams and Concrete-Encased Steel Angle Columns [J] . Hwang Hyeon-Jong, Eom Tae-Sung, Park Hong-Gun, Journal of structural engineering . 2015,第11期

机译：U型钢梁与外包钢角钢柱梁柱连接的循环荷载试验
3. Performance of axially restrained concrete encased steel composite columns at elevated temperatures [J] . Ben Young, Ehab Ellobody Engineering Structures . 2011,第1期

机译：轴向约束混凝土包裹钢组合柱在高温下的性能
4. COMPARATIVELY EXPERIMENTAL ANALYSIS ON CURVE OF P- Δ OF ENCASED STEEL REINFORCED CONCRETE BEAM AND COLUMN IN ELECTRIC FACTORY [C] . Fu Lili, Liu Ying, Jiang Weishan, International Conference on Steel-Concrete Composite and Hybrid Structures; 20060812-14; Harbin(CN) . 2006

机译：电工钢夹层钢筋混凝土梁与柱P-Δ曲线的对比试验分析
5. Performance of FRP-encased steel-concrete composite columns . [D] . Karimi, Kian. 2011

机译：FRP包裹的钢混凝土组合柱的性能。
6. Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns [O] . Jing Lv, Tianhua Zhou, Qiang Du, 2020

机译：预制骨料钢管混凝土柱粘结性能研究
7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。
8. Bond Between Concrete and Steel Reinforcement at Temperatures to 149 exp 0 C (300 exp 0 F) [R] . Oland, C. B., Callahan, J. P. 1978

机译：混凝土与钢筋之间的粘结温度为149 exp 0 C（300 exp 0 F）

Factors Influencing Bond Properties in Concrete Encased Steel Columns at High Temperatures

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