期刊检索

  • 2024年第56卷
  • 2023年第55卷
  • 2022年第54卷
  • 2021年第53卷
  • 2020年第52卷
  • 2019年第51卷
  • 2018年第50卷
  • 2017年第49卷
  • 2016年第48卷
  • 2015年第47卷
  • 2014年第46卷
  • 2013年第45卷
  • 2012年第44卷
  • 2011年第43卷
  • 2010年第42卷
  • 第1期
  • 第2期

主管单位 中华人民共和国
工业和信息化部
主办单位 哈尔滨工业大学 主编 李隆球 国际刊号ISSN 0367-6234 国内刊号CN 23-1235/T

期刊网站二维码
微信公众号二维码
引用本文:单奇峰,童科挺,丁静姝,李玉顺.张弦式钢竹组合工字形梁的短期受弯性能[J].哈尔滨工业大学学报,2024,56(1):93.DOI:10.11918/202303003
SHAN Qifeng,TONG Keting,DING Jingshu,LI Yushun.Short-term bending performance of prestressed steelbamboo composite I-shaped beams[J].Journal of Harbin Institute of Technology,2024,56(1):93.DOI:10.11918/202303003
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  下载PDF阅读器  关闭
过刊浏览    高级检索
本文已被:浏览 5572次   下载 5878 本文二维码信息
码上扫一扫!
分享到: 微信 更多
张弦式钢竹组合工字形梁的短期受弯性能
单奇峰1,童科挺1,丁静姝1,李玉顺2
(1.宁波大学 土木工程与地理环境学院,浙江 宁波 315211;2.青岛农业大学 建筑工程学院,山东 青岛 266109)
摘要:
为研究张弦式钢竹组合工字形梁的受弯性能,以预应力水平、张弦及加载方式为基本参数,设计制作了12根张弦式钢竹组合工字形梁进行受弯试验,观察分析了加载过程中组合梁的试验现象、破坏特征,探究了各参数对组合梁承载能力、应变分布、变形性能等的影响规律,并推导得出了张弦式组合梁承载力的近似计算公式。结果表明:张弦式组合梁的整体性能优良、组合效应突出,具有良好的变形性能及承载能力;张弦试件的破坏形态主要为翼缘竹材撕裂、局部钢材屈曲等破坏;施加预应力及提高预应力水平能有效增加组合梁的变形性能,以及在相同挠度控制条件下的承载能力,且采用二点张弦布置预应力筋时可获得更好的效果;张弦式组合梁跨中截面应变分布符合平截面假定,且随着预应力水平提高而中性轴下移;最后,基于理论计算得出的承载力与试验值较为接近且相对保守,近似计算公式具有较好的适用性。
关键词:  组合结构  张弦式钢竹组合梁  受弯性能  张弦方式  承载力计算
DOI:10.11918/202303003
分类号:TU366.3
文献标识码:A
基金项目:国家自然科学基金(5,4)
Short-term bending performance of prestressed steelbamboo composite I-shaped beams
SHAN Qifeng1,TONG Keting1,DING Jingshu1,LI Yushun2
(1.School of Civil & Environmental Engineering and Geography Science, Ningbo University, Ningbo 315211, Zhejiang,China; 2.College of Civil Engineering & Architecture, Qingdao Agricultural University, Qingdao 266109, Shandong, China)
Abstract:
To study the bending performance of prestressed steelbamboo composite I-shaped beams, 12 prestressed composite I-shaped beams were designed and manufactured for bending tests, considering prestress loads, prestressing schemes, and loading schemes as basic parameters. The experimental phenomenon was observed, and failure characteristics were analyzed during the test. The influences of different parameters on the load-bearing capacity, strain distribution, and deformation performance were explored, and an approximate formula for the bearing capacity of the prestress composite beam was proposed. The results indicated that the prestressed composite beams have relatively good performances from the perspectives of combination effect, deformation characteristic, and bearing capacity. Failure modes of tested specimens were mainly owing to the bamboo flanges damage and the local buckling of steel plates. With the technique of prestress and the increase of prestress level, the deformation performances can be improved effectively, as well as the load-bearing capacity considering the same deflection situation. Moreover, the improvements can be more significant with the two-point prestressing scheme. The mid-span strain distribution of prestressed composite beams conforms to the plane section assumption, and the neutral axis moves down with the increase of the prestressing level. Finally, the bearing capacities based on the theoretical calculation matched well with the experimental results, which showed the applicability of the proposed methods.
Key words:  composite structure  prestressed steelbamboo composite beam  bending performance  prestressing scheme, calculation of load-bearing capacity

友情链接LINKS