Analysis on pull-out behaviors of single nail connection in steel-UHPC composite beams

被引：1
|
作者：
Zhu J. [1 ,2 ]
Gao T. [1 ]
Ding J. [1 ]
机构：
[1] School of Civil Engineering, Tianjin University, Tianjin
[2] Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2023年 / 53卷 / 01期
关键词：
bridge engineering; pull-out behavior; pull-out capacity; single nail connector; steel-UHPC (ultra high performance concrete) composite beam;
D O I：
10.3969/j.issn.1001-0505.2023.01.006
中图分类号：
学科分类号：
摘要：
To study the pull-out behaviors of single-nail connections of steel-UHPC (ultra high performance concrete) composite beams, six pull-out tests of single nail connections of steel-UHPC composite beams and numerical calculation based on ANSYS software were carried out. The effects of the diameter and the height of the stud on the pull-out capacity and failure mode were analyzed. The calculation formula of the pull-out capacity of the steel-UHPC single nail connection was proposed. The limiting height-to-diameter ratios of two typical failure modes including the rod rupture of bolt nail and the cracking of UHPC were obtained under different UHPC and stud material strengths. The results show that when the ratio of height to diameter is greater than the limit value, the failure of the pull-out test piece presents with the pull-off failure of the bolt nail rod, and the UHPC is in good condition, belonging to the ductile failure. When the ratio of height to diameter is less than the limit value, the specimen present UHPC cracking failure with the stud completely out, and the angle between the punching failure surface of UHPC and the vertical surface is about 43°, which belongs to brittle failure. The calculated value of the pull-out capacity formula of the steel-UHPC single nail connection is slightly lower than the simulation value, and the relative error is less than 10%. © 2023 Southeast University. All rights reserved.
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页码：44 / 52
页数：8
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