| 钢管高强混凝土柱的力学性能Ⅰ.轴压短柱的力学性能 |
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| 引用本文： | 谭克锋.钢管高强混凝土柱的力学性能Ⅰ.轴压短柱的力学性能[J].西南科技大学学报,2005,20(3):22-27,54. |
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| 作者姓名： | 谭克锋 |
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| 作者单位： | 西南科技大学材料科学与工程学院,四川,绵阳,621010 |
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| 摘 要： | 对20根长径比为3．5，内填54～116MPa的钢管混凝土的力学性能进行了研究。研究结果表明，采用钢管约束可以显著地改善高强混凝土的延性，改善的程度随套箍指标F的增加而增加。钢管内混凝土强度的增加也与套箍指标F成正比。为彻底改善高强混凝土的塑性，套箍指标F应大于等于0．48。最后给出了钢管高强混凝土承载能力计算公式。
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| 关 键 词： | 钢管混凝土 承载能力 高强混凝土 |
| 文章编号： | 1671-8755（2005）03-0022-05 |
| 收稿时间： | 2005-07-06 |
| 修稿时间： | 2005-07-06 |
Mechanical Properties of High- Strength Concrete Filled Steel Tubular Columns Part 1: Concentrically Loaded Short Columns |
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| Tan Kefeng.Mechanical Properties of High- Strength Concrete Filled Steel Tubular Columns Part 1: Concentrically Loaded Short Columns[J].Journal of Southwest University of Science and Technology,2005,20(3):22-27,54. |
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| Authors: | Tan Kefeng |
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| Institution: | School of Material Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China |
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| Abstract: | This study investigated the mechanical properties of 20 High Strength Concrete filled steel tubular short columns(HSCFSTSC) with length to diameter ratio(L/D) of 3.5.The strength of concrete used to fill the steel tubular columns ranged from 54MPa to 116MPa.The test results showed that using a steel tube as confinement can significantly improve the ductility and compressive strength of core concrete.The magnitude of compressive strength increase of core concrete was directly proportional to the Confinement Index,F,and the extent of improvement of the ductility increases as the F increases.For thoroughly improving the ductility of core concrete,the Confinement Index F should be equal to or larger than 0.48.The formula used to calculate the load bearing capacity of HSCFSTSC was given out. |
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| Keywords: | concrete filled steel tube load bearing capacity high strength concrete |
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