Finite element analysis on shear behavior of headed studs in steel-UHPC composite slab

被引：15

作者：

Hu, Wenxu ^{[1
,2
]}

Li, Cong ^{[2
,3
]}

Chen, Baochun ^{[2
,4
]}

Liu, Yongjian ^{[1
]}

机构：

[1] Changan Univ, Sch Highway, Xian 710064, Peoples R China

[2] Fuzhou Univ, Coll Civil Engn, Fuzhou 350108, Peoples R China

[3] Guangxi Univ, Coll Civil Engn & Architecture, Nanning 530004, Peoples R China

[4] Natl Ctr Joint Int Res Bridges Technol Innovat & R, Fuzhou 350108, Peoples R China

来源：

STRUCTURES | 2023年 / 52卷

关键词：

UHPC; Headed stud; Weld collar; Group stud effect; Shear bearing capacity; Slip; STATIC BEHAVIOR; CONNECTORS; PERFORMANCE; STRENGTH; BEAMS;

D O I：

10.1016/j.istruc.2023.03.185

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Headed stud connectors play a key role in steel-ultra-high performance concrete (UHPC) composite slab, which has many applications in long-span bridges. In this paper, a finite element (FE) model is validated by a series of push-out tests to study the shear behaviors of headed stud in steel-UHPC composite slab. After validation, the interaction between stud and UHPC is explored and parametric analysis is performed. The influence of weld collar, diameter and spacing of stud on the failure mode, shear bearing capacity and load-slip relationship of stud connector are discussed. From FE results, the group stud effect should be considered, as the ratio of stud spacing to diameter is less than 3.5, 5.0 and 6.5 for the diameter of 13 mm, 16 mm and 19 mm respectively. A formula to predict the shear bearing capacity of stud is proposed by considering the influence of weld collar and group stud effect. A shear-slip model of stud is established based on experimental and FE analysis results.

引用

页码：464 / 475

页数：12

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