摘要
为比较高强螺栓在推出试件和梁式试件中的抗剪性能,基于高强螺栓连接推出试验结果,合理定义了表征高强螺栓抗剪性能的抗滑移荷载、初始抗剪刚度、滑移后刚度和极限抗剪承载力等指标.在此基础上,通过建立推出试件和梁式试件的精细化三维有限元模型,比较了高强螺栓在推出试件和梁式试件中的抗剪性能指标.结果表明,高强螺栓在组合梁和推出试件中具有相近的抗滑移荷载和初始抗剪刚度,其中抗滑移荷载约为57 kN,初始抗剪刚度约560 kN/mm.而高强螺栓在组合梁中滑移后刚度提高了42.3%、极限抗剪承载力提高了3.9%,因此,用推出试件结果来分析组合梁中高强螺栓的抗剪性能是安全的、可行的.
Base on the high-strength bolt connection push-out test results,indicators such as anti-slip load,initial shear stiffness,post slipping stiffness,and ultimate shear bearing capacity that characterize the shear performance of high-strength bolts were defined reasonably to compare the shear performance of high-strength bolts in push-out specimens and beam specimens.On the basis of reasonable definition of shear performance indexes,the shear performance indexes of high-strength bolts in push-out specimens and beam specimens were compared by establishing fine three-dimensional finite element models of push-out specimens and beam specimens.The results showed that the high-strength bolts had similar anti-slip load(about 57 kN)and initial shear stiffness(about 560 kN/mm)in the composite beams and the push-out specimens.Meanwhile the post slipping stiffness of the high-strength bolts in the compositr beams increased by 42.3%and the ultimate shear bearing capacity increased by 3.9%.Therefore,it is safe and feasible to analyze the shear performance of high-strength bolts in composite beams using the results of test specimens.
作者
张玉杰
朱健辉
吴琳琅
林汉栩
郑思维
张晓宇
ZHANG Yujie;ZHU Jianhui;WU Linlang;LIN Hanxu;ZHENG Siwei;ZHANG Xiaoyu(College of Urban and Rural Construction,Zhongkai University of Agriculture and Engineering,Guangzhou 510225,China;Chongqing Bishan Construction Engineering Quality Inspection Co.,LTD,Chongqing 402760,China)
出处
《仲恺农业工程学院学报》
CAS
2023年第3期1-9,共9页
Journal of Zhongkai University of Agriculture and Engineering
基金
广东省基础与应用基础研究基金项目(区域联合基金-青年基金项目)(2022A1515110554)
广州市基础研究计划基础与应用基础研究项目(2023A04J1558)
仲恺农业工程学院大学生创新创业训练项目(X202211347419).
关键词
高强螺栓
抗剪性能
推出试验
梁式试验
high-strength bolts
shear performance
push-out test
beam test
