TY - JOUR
T1 - Standard Pushout Tests and Design Rules for a Bolted-Welded Hybrid Demountable Shear Connector
AU - He, Jun
AU - Suwaed, Ahmed S. H.
AU - Vasdravellis, George
AU - Wang, Sihao
N1 - Funding Information:
The authors gratefully acknowledge the financial support provided by Horizon 2020—Marie Skłodowska-Curie Individual Fellowship of European Commission (REUSE: 793787), the National Natural Science Foundation of China (51978081), and the Natural Science Foundation of Hunan Province, China (2021JJ30712). The authors are grateful to the technicians at the Heavy Structures Lab at Heriot-Watt University, Edinburgh, UK. Any opinions, findings, and conclusions expressed in this article are those of the authors and do not reflect the views of the sponsors and supporters.
Publisher Copyright:
© 2022 American Society of Civil Engineers.
PY - 2022/8
Y1 - 2022/8
N2 - A bolted-welded hybrid demountable shear connector for use in deconstructable steel-concrete composite buildings and bridges was proposed. The hybrid connector consisted of a partially threaded stud, which was welded on the flange of a steel section, and a machined steel tube with compatible geometry, which was bolted on the stud. Four standard pushout tests according to Eurocode 4 were carried out to assess the shear performance of the hybrid connector. The experimental results show that the initial stiffness, shear resistance, and slip capacity of the proposed connector were higher than those of traditional welded studs. The hybrid connector was a ductile connector, according to Eurocode 4, with slip capacity higher than 6 mm. A nonlinear finite-element model was calibrated against the pushout tests and found capable of reproducing the experimental behavior with good agreement. The verified finite-element model was then used to conduct a series of parametric studies in order to assess the effect of infilled grout, concrete slab strength, stud diameter, stud tensile strength, tube thickness, and tube tensile strength on the shear resistance and stiffness of the hybrid connector. Based on the experimental and numerical results, a design equation is proposed for the prediction of the shear resistance of the novel connector.
AB - A bolted-welded hybrid demountable shear connector for use in deconstructable steel-concrete composite buildings and bridges was proposed. The hybrid connector consisted of a partially threaded stud, which was welded on the flange of a steel section, and a machined steel tube with compatible geometry, which was bolted on the stud. Four standard pushout tests according to Eurocode 4 were carried out to assess the shear performance of the hybrid connector. The experimental results show that the initial stiffness, shear resistance, and slip capacity of the proposed connector were higher than those of traditional welded studs. The hybrid connector was a ductile connector, according to Eurocode 4, with slip capacity higher than 6 mm. A nonlinear finite-element model was calibrated against the pushout tests and found capable of reproducing the experimental behavior with good agreement. The verified finite-element model was then used to conduct a series of parametric studies in order to assess the effect of infilled grout, concrete slab strength, stud diameter, stud tensile strength, tube thickness, and tube tensile strength on the shear resistance and stiffness of the hybrid connector. Based on the experimental and numerical results, a design equation is proposed for the prediction of the shear resistance of the novel connector.
KW - Demountable shear connector
KW - Pushout test
KW - Shear resistance
KW - Slip capacity
KW - Steel-concrete composite structure
UR - http://www.scopus.com/inward/record.url?scp=85131731917&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)ST.1943-541X.0003404
DO - 10.1061/(ASCE)ST.1943-541X.0003404
M3 - Article
AN - SCOPUS:85131731917
SN - 0733-9445
VL - 148
JO - Journal of Structural Engineering
JF - Journal of Structural Engineering
IS - 8
M1 - 04022097
ER -