Calculation method for shear bearing capacity of double T-shaped steel-concrete composite beams

CHEN Jianbing; TIAN Zhuangyan; LIU Cong; LI Xiang

doi:10.11835/j.issn.2096-6717.2025.007

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Calculation method for shear bearing capacity of double T-shaped steel-concrete composite beams

更新时间：2025-03-15

- Calculation method for shear bearing capacity of double T-shaped steel-concrete composite beams
- Journal of Civil and Environmental Engineering Pages: 1-12(2025)
- 作者机构：
  
  1.苏州科技大学土木工程学院，江苏苏州 215011
  2.中交一公局第二工程有限公司，江苏苏州 215011
- 作者简介：
  
  CHEN Jianbing (1968- ), professor, main research interest: combined structure, E-mail: szctt2009@163.com.
- 基金信息：
  
  National Natural Science Foundation of China(52208187)
- DOI：10.11835/j.issn.2096-6717.2025.007
  CLC： TU398
- Received：12 November 2024，
  
  Online First：15 March 2025，
- 稿件说明：
移动端阅览
陈建兵,田壮言,刘聪等.双拼T型钢-混组合梁抗剪承载力计算方法[J].土木与环境工程学报,

CHEN Jianbing,TIAN Zhuangyan,LIU Cong,et al.Calculation method for shear bearing capacity of double T-shaped steel-concrete composite beams[J].Journal of Civil and Environmental Engineering,
陈建兵,田壮言,刘聪等.双拼T型钢-混组合梁抗剪承载力计算方法[J].土木与环境工程学报, DOI：10.11835/j.issn.2096-6717.2025.007.

CHEN Jianbing,TIAN Zhuangyan,LIU Cong,et al.Calculation method for shear bearing capacity of double T-shaped steel-concrete composite beams[J].Journal of Civil and Environmental Engineering, DOI：10.11835/j.issn.2096-6717.2025.007.

摘要

双拼T型钢-混组合梁（DTSCB）是一种新型结构形式，钢腹板对混凝土腹板的约束作用提升了组合梁的承载力，混凝土腹板增强了钢梁的局部稳定性。为研究DTSCB的抗剪性能，以混凝土翼板宽度和钢板厚度为参数，设计制作了3根试件，通过剪力-跨中挠度曲线、剪力-相对滑移曲线及应变分布等试验结果，分析结构参数对组合梁承载力及变形能力的影响。基于ABAQUS软件建立有限元模型，验证了模型的准确性，并进一步模拟分析了不同剪跨、钢板厚度、混凝土翼板宽度等结构参数对抗剪承载力的影响，提出了抗剪承载力计算公式。研究结果表明：剪跨比对组合梁的抗剪承载力具有显著影响，同时决定了钢梁和混凝土在抗剪承载力中的分担比例；斜压破坏、剪切破坏和弯曲破坏的界限剪跨比分别为1和3；当剪跨比

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=75620458&type=

3.30200005

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15.15533447

时，钢腹板承担了约70%的剪力；提出的抗剪承载力计算公式比现行规范具有更高的计算精度。

Abstract

Double T-shaped steel-concrete composite beams (DTSCB) are a new type of structural form. The restraining effect of the steel web on the concrete web enhances the load-bearing capacity of the composite beam

while the concrete web improves the local stability of the steel beam. To investigate the shear performance of DTSCB

this study designed and fabricated three specimens with varying concrete flange widths and steel plate thicknesses as parameters. Through experimental results such as shear force-midspan deflection curves

shear force-relative slip curves

and strain distribution

the influence of structural parameters on the load-bearing capacity and deformation ability of the composite beams was analyzed. A finite element model was established using ABAQUS software to verify the accuracy of the model

and further simulations were conducted to analyze the effects of different structural parameters

such as shear span

steel plate thickness

and concrete flange width

on the shear capacity. A formula for calculating shear capacity was proposed. The research results indicate that shear span ratio has a significant impact on the shear capacity of the composite beam and determines the proportional contribution of the steel beam and concrete to the shear resistance. The critical shear span ratios for diagonal compression failure

shear failure

and bending failure are 1 and 3

respectively. When the shear span ratio is 1 to 3

the steel web bears approximately 70% of the shear force. The proposed shear capacity calculation formula offers higher accuracy compared to current design codes.

关键词

Keywords

references

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