Article
Engineering, Civil
Jingnan Ding, Jinsong Zhu, Jingfu Kang, Xiuce Wang
Summary: The shear behavior of grouped stud connectors embedded in ultra high-performance concrete was studied through push-out tests with varied parameters. Results showed that increasing stud diameter improved shear performance, while reducing stud spacing could lead to a decline in shear capacity. Moreover, lower aspect ratio was found feasible for thinner UHPC slabs.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Jie Yu, Yu-Hang Wang, Jie-Peng Liu, Y. Frank Chen, Shang-Ling Xue, Zhou Yu
Summary: In this study, a refined finite element model was established to simulate the push-out test of shear stud group connectors (SSGCs). The model was validated by comparing the failure phenomena and interface shear-slip curves with experimental results. Additionally, a theoretical calculation formula for the stiffness of SSGCs was obtained and verified through experiments and fitting with the finite element analysis results.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Yiming Liu, Yi Bao, Lu Deng, Qinghua Zhang
Summary: This study investigates the effects of stud degradation and stud arrangement on the fatigue behavior of steel-UHPC composite decks through finite element analysis. A numerical method considering stud degradation is proposed and experimentally validated to evaluate the fatigue performance of composite decks. Parametric analysis is conducted to study the effect of stud arrangement. The results show that stud degradation and reduced stud spacing result in a more uniform distribution of shear forces at steel-UHPC interfaces. Neglecting stud degradation may underestimate the fatigue life of stud connectors. This study advances the understanding of fatigue behavior and the ability to analyze fatigue in steel-UHPC composite decks.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Cong Li, Baochun Chen, Wenxu Hu, Khaled Sennah
Summary: This paper investigates the shear behavior of a composite slab made of steel and Ultra-high Performance Concrete (UHPC) connected by different connector types. The study explores the influences of parameters such as connector type, bonding area, number of headed studs, and loading mode on the shear resistance of the hybrid connector. The results provide insights into the shear transfer mechanism, composite effect, and shear resistance of the stud and epoxy resin adhesive for the hybrid connector.
Article
Engineering, Civil
Fangwen Wu, Wenlong Tang, Shuo Liu, Zhou Fan, Fei Yang
Summary: This study investigates the shear behaviors of welded stud and perfobond rib connectors used in steel-HSFRC composite girders. The experimental results demonstrate that the shear capacity and stiffness of these connectors are improved in the composite girders, while the ductility decreases. Factors such as stud diameter and perforating rebar diameter have significant effects on the shear behavior of these connectors. Prediction equations for shear capacity are proposed and verified to be accurate and applicable.
Article
Engineering, Civil
Jiepeng Liu, Jincheng Xie, Gang Xiong, Xuanding Wang, Yunhe Zou, Rui Shu, Frank Chen
Summary: Full-scale push-out tests were conducted to study the shear behavior of HSBCs in prefabricated steel-concrete composite bridge beams. The tests considered key parameters including steel block height, longitudinal connector spacing, presence of oblique rebars in the precast slab, and grouting material. The results showed that HSBCs have large shear stiffness, high shear capacity (approximate to 1500kN), and sufficient deformability. The height and spacing of HSBCs were identified as the two principal parameters affecting shear capacity and failure mode.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Jingjing Qia, Zuwei Xie, Hua Cao, Zhi Huang, Weirong Lv, Weihua Shi
Summary: A stud shear connector with constraint measure is proposed in this paper to solve the problem of pry-out local splitting. The interface shear behavior of the new connector is studied through push-out test, and it is compared with the traditional stud connector. The results show that the stud shear connector with constraint measure can effectively avoid the adverse effect of local pressure splitting and improve the shear stiffness between steel and concrete flange plates, providing a theoretical basis for the design of strong connection coefficient of steel-concrete composite structures.
STRUCTURAL ENGINEERING AND MECHANICS
(2022)
Article
Engineering, Civil
Zhuangcheng Fang, Haozhen Fang, Junxing Huang, Haibo Jiang, Gongfa Chen
Summary: This study investigates the static analysis of grouped stud shear connectors in steel-precast UHPC composite structures through 18 push-out tests. The results indicate that the stud diameter and slab thickness play significant roles in the structural performance. Additionally, adopting appropriate shear pocket geometry improves the shear behavior of connectors. The grouped stud effect should be considered, and design recommendations are provided.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Hao Meng, Wei Wang, Rongqiao Xu
Summary: An analytical model was proposed to describe the shear behaviors of headed stud shear connectors by analyzing load-slip curves and failure modes, leading to successful prediction of load-slip curves.
ENGINEERING STRUCTURES
(2022)
Article
Construction & Building Technology
Chengqian Wen, Guotao Yang
Summary: To improve the fabrication efficiency and address the contradiction between construction progress and structural performance in composite structures, the shear performance of stud connections with different concrete ages was analyzed. 18 typical vertical push-out tests were conducted on stud shear connectors at concrete ages of 7 days, 14 days, and 28 days. The effects of concrete age, stud spacing, and stud diameter on the shear capacity, connection stiffness, and failure mode of the connectors were studied. A new relationship expression for load-slip of stud connectors with various concrete ages was proposed, and a more practical prediction equation for the shear capacity of stud connectors with different concrete ages was established by evaluating the existing design code.
STEEL AND COMPOSITE STRUCTURES
(2023)
Article
Multidisciplinary Sciences
P. Naveenkumar, R. Prakash, P. Sangeetha
Summary: Space trusses are used as three-dimensional frames in industrial structures, providing greater span capabilities. The weight and stiffness-to-weight ratio of a space truss structure are advantageous. The concrete slab over the upper chords of the space trusses helps overcome buckling issues, and the composite action between the slab and truss is crucial for load support.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Physical
Henan Zhang, Zhibin Ling
Summary: This study proposes the use of grouted stud connectors (GSC) in steel-timber composite (STC) systems and explores their mechanical characteristics through finite element modeling. The results show that stud diameter, angle, and strength have significant influences on the shear capacity and stiffness of GSC connections. Additionally, a comparison is made between the finite element simulated results and predictions from design codes and literature. The study also discusses the group effect of GSC connections with multiple rows of studs and proposes an effective row number to characterize this effect.
Article
Construction & Building Technology
Mohammed Aljuboori, Habib Tabatabai
Summary: In this study, the potential of several steel connector shapes as seismic energy dissipating devices between vertical precast concrete shear wall panels was evaluated. The multiple yield zone (MYZ) connector was proposed based on its improved performance in energy dissipation compared to the conventional U-shaped flexure plate (UFP) device. The MYZ connector provides stiffness and energy dissipation in both horizontal and vertical directions, and its use resulted in better energy dissipation and structure response compared to the UFP alternate. The presence of multiple yield zones through circular cut-outs is crucial for the performance enhancement observed with the MYZ connector.
Article
Construction & Building Technology
Huawen Ye, Ruosen Huang, Shiqing Tang, Yu Zhou, Jilin Liu
Summary: A unified framework was used to develop a general expression of shear load-slip equation for headed-stud shear connectors. Through regression analysis and sensitivity analysis using a push-out test database, an empirical calculation model for shear stiffness was established, which outperforms previous models in predicting shear load-slip response and stiffness of the connectors.
STEEL AND COMPOSITE STRUCTURES
(2022)
Article
Construction & Building Technology
Wei Wang, Xie-Dong Zhang, Jun Chen, Xi-Long Zhou, Bai Zhang
Summary: This study investigated the repetitive performance of an advanced bolted shear connection used in steel-concrete composite beams. Various parameters were considered, including bolt diameter, bolt load, loading path, and loading program. The failure mode, load-slip response, shear bearing resistance, initial slip load, shear stiffness, peak slip, and ductility were evaluated. It was found that bolt shear capacity and load-slip response were similar under repetitive loading as compared to monotonous loading. Additionally, it was observed that peak slip increased with the increase in bolt diameter under repetitive loading. Design recommendations based on existing formulae were also proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2023)