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高强U形外包钢-混凝土组合梁受弯性能

操礼林,  石启印,  王震,  葛义韬,  李爱群

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文章导航 > 西南交通大学学报  > 2014 >  27(1): 72-78.
操礼林, 石启印, 王震, 葛义韬, 李爱群. 高强U形外包钢-混凝土组合梁受弯性能[J]. 西南交通大学学报, 2014, 27(1): 72-78. doi: 10.3969/j.issn.0258-2724.2014.01.012
引用本文: 操礼林, 石启印, 王震, 葛义韬, 李爱群. 高强U形外包钢-混凝土组合梁受弯性能[J]. 西南交通大学学报, 2014, 27(1): 72-78. doi: 10.3969/j.issn.0258-2724.2014.01.012
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CAO Lilin, SHI Qiyin, WANG Zhen, GE Yitao, LI Aiqun. Bending Performances of High-Strength Steel-Encased Composite Beams[J]. Journal of Southwest Jiaotong University, 2014, 27(1): 72-78. doi: 10.3969/j.issn.0258-2724.2014.01.012
Citation: CAO Lilin, SHI Qiyin, WANG Zhen, GE Yitao, LI Aiqun. Bending Performances of High-Strength Steel-Encased Composite Beams[J]. Journal of Southwest Jiaotong University, 2014, 27(1): 72-78. doi: 10.3969/j.issn.0258-2724.2014.01.012
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高强U形外包钢-混凝土组合梁受弯性能

doi: 10.3969/j.issn.0258-2724.2014.01.012
基金项目: 

国家杰出青年基金资助项目（50725828）

江苏省“六大人才高峰”项目（2010-JZ-008）

河南省交通运输科技计划项目（2012P43）

Bending Performances of High-Strength Steel-Encased Composite Beams

    摘要
  • 摘要: 为研究高强U形外包钢-混凝土组合梁在静载作用下的受弯性能，对3根完全剪力连接的混凝土强度等级为C60、C80和外包钢板强度等级为Q420、Q460的简支组合梁进行了两点对称集中加载试验.分析了试件在弹性与弹塑性阶段的受力过程、荷载-挠度关系、U形外包高强钢板与内部高强混凝土应变的分布规律、外包钢板与组合梁端部滑移、裂缝发展情况以及破坏形态等；基于试验结果，提出了高强U形外包钢-混凝土组合梁正截面受弯承载力计算方法.研究结果表明：在静载作用下，高强U形外包钢-混凝土组合梁的受弯承载力比普通外包钢组合梁提高60%以上，位移延性系数分别为2.16、2.76和2.34，说明高强U形外包钢-混凝土组合梁受弯性能良好.

     

    Abstract: In order to investigate the bending behavior of high-strength steel-encased composite beams under static load, bending performances of three simply-supported beam specimens with full-interaction and different strengths of steel and concrete were investigated experimentally. The load-defection relationship, strain distribution, steel-concrete interface slippage, crack development and failure mode of these beams were discussed. Based on the test results, the calculation formulas of normal section bearing capacity of high-strength steel-encased composite beam were presented. The research results show that compared with an ordinary composite beam, the bending capacity of a high-strength steel-encased composite beams under static load increases by over 60%, and the displacement ductility coefficients for the three beams are 2.16, 2.76 and 2.34, respectively, indicating that a high strength steel-encased composite beam has a good bending performance.

     

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出版历程
  • 收稿日期:  2013-01-15
  • 刊出日期:  2014-01-25

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