摘要
试验共设计16个推出试件,探究螺栓直径、螺栓等级、螺栓预紧力和剪力键类型对钢-预制超高性能混凝土(ultra-high performance concrete,UHPC)组合梁中高强螺栓剪力键抗剪性能的影响.试验结果表明,推出试件以剪力键剪断为主要破坏模式.螺栓剪力键的抗剪性能随螺栓的直径和螺栓等级的增大而提高;螺栓预紧力仅对初始抗剪刚度有影响;相比于传统焊钉剪力键,螺栓剪力键的单栓抗剪承载力有所下降,但整体抗剪性能仍满足结构性能要求.结合试验结果和国内外规范公式,提出一条更精确的计算公式用以预测钢-预制UHPC组合梁中螺栓剪力键的抗剪承载力.
A total of sixteen push-out tests were conducted in this study to explore the effects of bolt diameter,bolt grade,bolt pretension degree and shear connector type on the shear performance of high-strength bolts in steel-prefabricated ultra-high performance concrete(UHPC)composite beams.The experimental results indicated that the specimens were mainly failed in bolts fracture.The shear behavior of bolted shear connectors increased with the increase of bolt diameter and bolt grade.The pretension degree of bolt only affected the initial shear stiffness.Compared to traditional welded studs with the same diameter,the shear capacity of bolted shear connector decreased,while the overall shear performance met the requirements of structural mechanical properties.Combining experimental results with domestic and foreign standard formulas,a more accurate model was proposed to predict the shear bearing capacity of the bolted shear connector in the steel-prefabricated UHPC composite beam.
作者
吴锦鹏
吴加杰
曹志鹏
方壮城
姜海波
WU Jinpeng;WU Jiajie;CAO Zhipeng;FANG Zhuangcheng;JIANG Haibo(School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou,Guangdong 510006,China;School of Civil Engineering,Guangzhou University,Guangzhou,Guangdong 510006,China)
出处
《福州大学学报（自然科学版）》
CAS
北大核心
2024年第4期462-470,共9页
Journal of Fuzhou University(Natural Science Edition)
基金
国家自然科学基金资助项目(52208156)
中国博士后基金资助项目(2022M720874)
广东省基础与应用基础研究基金区域联合基金资助项目(2022A1515110394)。
关键词
高强螺栓剪力键
钢-预制超高性能混凝土(UHPC)组合梁
可拆卸式
抗剪性能
high-strength bolts shear connector
steel-prefabricated ultra-high performance concrete(UHPC)composite beams
detachable
shear resistance performance
作者简介
通信作者:姜海波(1970-),教授,主要从事新型桥梁结构、新材料在桥梁工程中的应用和桥梁结构安全性评估及加固技术研究,hbjiang@gdut.edu.cn。
