| 引用本文: | 徐海宾,邓宗才.有腹筋UHPFRC梁抗剪承载力计算[J].哈尔滨工业大学学报,2015,47(12):80.DOI:10.11918/j.issn.0367-6234.2015.12.014 |
| XU Haibin,DENG Zongcai.Shear capacity of UHPFRC beams with stirrups[J].Journal of Harbin Institute of Technology,2015,47(12):80.DOI:10.11918/j.issn.0367-6234.2015.12.014 |
|
| 摘要: |
| 为研究有腹筋UHPFRC梁的抗剪承载力,根据超高性能纤维混凝土梁的剪切破坏机理,结合修正压力场理论,考虑梁上部受压区混凝土和下部受拉区骨料咬合力、箍筋及裂缝间钢纤维共同承受剪力,推导了有腹筋超高性能纤维混凝土梁的抗剪承载力计算公式.与9根超高性能纤维混凝土梁的剪切试验结果进行对比,用推导公式计算的抗剪承载力与试验结果吻合较好,且变异系数较小,可用于有腹筋超高性能纤维混凝土梁的抗剪分析和设计. |
| 关键词: 超高性能纤维混凝土 腹筋 梁 抗剪承载力 修正压力场理论 |
| DOI：10.11918/j.issn.0367-6234.2015.12.014 |
| 分类号:TU375.1 |
| 基金项目:国家自然科学基金(51378032)；北京市自然科学基金(8142005)；河南理工大学青年基金(Q2014-08A). |
|
| Shear capacity of UHPFRC beams with stirrups |
|
XU Haibin1,2, DENG Zongcai1
|
|
(1. Beijing Key Lab of Earthquake Engineering and Structural Retrofit(Beijing University of Technology),100124 Beijing,China; 2.School of Civil Engineering, Henan Polytechnic University, 454003 Jiaozuo, Henan,China)
|
| Abstract: |
| The equation for the shear capacity of UHPFRC beams with stirrups is deduced to study the shear capacity of UHPFRC beams with stirrups, based on the modified compression field theory, and considering the shear contribution of concrete in compression, shear stress transmitted across crack interface, shear carried by steel fibers and stirrups. The analysis results of nine tested UHPFRC beams in shear by the proposed equation agree well with the test values, and the variation coefficient is small. It is suitable for shear analysis and design for UHPFRC beams with stirrups. |
| Key words: ultra-high performance fiber reinforced concrete stirrup beam shear capacity modified compression field theory |
