(1 北京工业大学城市建设学部, 北京 100124; 2 深圳大学土木与交通工程学院, 深圳 518060;3 西安建筑科技大学土木工程学院, 西安 710055)

摘要: 钢-再生混凝土组合梁的受力性能足尺试验研究工作目前尚少. 为此,进行了 6 个型钢再生混凝土梁足尺试件受弯性能试验,各试件尺寸、配筋、内置型钢一致,梁长 3 300mm、净跨 3 000mm,梁截面高 300mm、宽 200mm,梁截面内置 H 型钢的型号为 HN200×100×5. 5×8. 各试件均采用再生粗骨料混凝土,再生粗骨料取代率分为 0%、50%、100%,混凝土设计强度等级分为 C30、C60. 采用三分点加载的方式,试验分析了各试件的承载力、变形及耗能能力,以及设计参数对试件抗弯性能的影响. 结果表明:在加载过程中梁内型钢与再生混凝土共同工作性能良好;合理采用再生粗骨料取代率情况下,型钢再生混凝土梁受弯性能和破坏形态与型钢普通混凝土梁接近;提高再生混凝土强度可以显著提高型钢再生混凝土梁的承载力、变形能力和耗能能力.

关键词: 型钢再生混凝土梁; 足尺试件; 抗弯性能

中图分类号:TU375 文献标志码:A 文章编号:1002-848X(2023)09-0108-07

DOI:10. 19701 / j. jzjg. 20222733

Full-scale experimental study on flexural behavior of steel reinforced recycled concrete beam

LIU Yibin1, CAO Wanlin1, XING Feng2, XUE Jianyang3, ZHOU Yingwu2, KOU Shicong2

(1 Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing 100124,China; 2 College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China;3 College of Civil Engineering, Xi’ an University of Architecture and Technology, Xi’ an 710055, China)

Abstract: At present, there is a lack of experimental research on the flexural behavior of steel reinforced recycled concretebeams. The flexural behavior of six full-scale specimens of steel reinforced recycled beams was tested. The size,reinforcement and built-in section steel of each specimen are the same, with the beam length 3 300mm, clear span3 000mm, the beam section height 300mm, and the width 200mm. The incased H-shaped steel is HN200×100×5. 5×8.Recycled coarse aggregate concrete was used in the specimens, and the recycled coarse aggregate replacement ratio is 0%,50% and 100% respectively,the design strength grade of concrete is C30 and C60, respectively. The test was performedwith a three-point loading method. The bearing capacity, deformation capacity and energy dissipation capacity of thespecimens were analyzed, and the influence of design parameters on the flexural behavior of the specimens was analyzed.The results show that in the loading process, the incased H-shaped steel and recycled concrete work well together. With thereasonable recycled coarse aggregate replacement ratio, the flexural behavior and failure mode of steel reinforced recycledbeams are similar to steel normal concrete beams. Increasing the recycled concrete strength can significantly improve thebearing capacity, deformation capacity and energy dissipation capacity of steel reinforced recycled concrete beams.

Keywords:steel reinforced recycled concrete beam; full-scale specimen; flexural behavior

∗国家重点研发计划课题(2017YFC0703304),北京市博士后工作经费资助项目(Q6001012202202).

第一作者:刘亦斌,博士,助理研究员,主要从事工程结构抗震研究,Email:tslyb@ 126. com.

[引用本文] 刘亦斌,曹万林,邢锋,等. 型钢再生混凝土梁受弯性能足尺试验[ J]. 建筑结构,2023,53 ( 9):108-114. LIU Yibin,CAO Wanlin,XING Feng,et al. Full-scale experimental study on flexural behavior of steel reinforcedrecycled concrete beam[J]. Building Structure,2023,53(9):108-114.