摘要
文中研发了一种轻质超高性能混凝土(lightweight ultra-high performance concrete,LUHPC),为了研究钢-LUHPC组合结构中剪力钉的抗剪性能和剪力钉承载力计算方法,设计制备了4组8个LUHPC剪力钉推出试件,开展了推出试验.结果表明:剪力钉直径从13 mm增大到16 mm时,剪力钉抗剪承载力提升了22.6%~24.4%,其抗剪刚度提升了14.68%~14.88%,剪力钉长度从80 mm增大到120 mm时,剪力钉抗剪承载力提升0.2%~1.2%,其抗剪刚度提升1.6%~1.9%,剪力钉直径与长度相比对提高抗剪承载力和抗剪刚度更为明显.根据试验数据,提出了适用于LUHPC中剪力钉抗剪承载力的计算公式和荷载-滑移曲线,计算值与试验值吻合,平均误差为1%.研究成果对推动LUHPC材料在钢-混组合梁桥中的应用提供了试验依据.
A lightweight ultra-high performance concrete(LUHPC)was developed.In order to study the shear behavior of shear studs and the calculation method of shear studs bearing capacity in steel-LUHPC composite structure,four groups of 8 LUHPC shear studs push-out specimens were designed and prepared,and push-out tests were carried out.The results show that when the diameter of shear studs increases from 13 mm to 16 mm,the shear capacity of shear studs increases by 22.6%~24.4%,and its shear stiffness increases by 14.68%~14.88%.When the length of shear studs increases from 80 mm to 120 mm,the shear capacity of shear studs increases by 0.2%~1.2%,and its shear stiffness increases by 1.6%~1.9%.Compared with the length,the diameter of shear studs is more obvious to improve the shear bearing capacity and shear stiffness.According to the test data,the calculation formula and load-slip curve of shear studs’s shear capacity in LUHPC are put forward.The calculated values are in good agreement with the test values,with an average error of 1%.The research results provide experimental basis for promoting the application of LUHPC materials in steel-concrete composite beam bridges.
作者
刘沐宇
王锦军
张强
詹建辉
彭晓彬
LIU Muyu;WANG Jinjun;ZHANG Qiang;ZHAN Jianhui;PENG Xiaobin(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China;Hubei Key Laboratory of Roadway Bridge&Structure Engineering,Wuhan University of Technology,Wuhan 430070,China;China Railway Major Bridge Reconnaissance&Design lnstitute Group Co.Ltd.,Wuhan 430050,China;Hubei Transportation Planning and Design Institute Co.Ltd.,Wuhan 430051,China)
出处
《武汉理工大学学报(交通科学与工程版)》
2025年第4期824-830,共7页
Journal of Wuhan University of Technology(Transportation Science & Engineering)
基金
湖北省重点研发计划项目(2020BCB065,2020BAB081)。
