TY - JOUR
T1 - Experiment and Modelling on Effective Width of Single and Twin I-beam Composite Girders
AU - Wen, Zongyi
AU - Wei, Xing
AU - Lin, Weiwei
AU - Zhao, Junmin
AU - Xiao, Lin
N1 - Funding Information:
The authors would like to gratefully acknowledge the financial support from National Natural Science Foundation of China (Grant Nos. 52078424), China Scholarship Council, and China Railway Eryuan Engineering Group Co. Ltd.
Publisher Copyright:
© 2023, Korean Society of Civil Engineers.
PY - 2023/6
Y1 - 2023/6
N2 - Effective width (b eff) has been widely used by designers, and several specifications can be selected. However, insufficient research has been conducted on the b eff of single and twin I-beam composite girders. Thus, finite element (FE) models, calibrated by the experiment, were used to study the effects of slab thickness, web position, interaction degree (ID) of shear studs, width-to-span ratio, and their coupling effects on b eff. Different loading types and two definitions of b eff were elaborated. The FE results were compared with specifications in Eurocode 4 (EC4) and AASHTO LRFD bridge design specifications (AASHTO). The following results were obtained. The modeling agrees with the experiment. The critical steel height-to-slab thickness ratio is around 4. When the ratio deviates from the critical value, b eff is reduced with the increase of slab thickness. ID has a slight influence on b eff. b eff changes within 10% when ID changes within 10%. The maximum b eff can be obtained when the web spacing-to-physical width ratio is 1/2. The decrease of web spacing brings a maximum reduction of 14% on b eff, whereas increasing web spacing results in a maximum reduction of 70% for twin I-beam. The coupled effect of web position and slab thickness is limited. The maximum difference is 25%. Recommended equations were proposed to evaluate b eff for single I-beam and twin I-beam composite girders based on the specifications in EC4 and AASHTO, which can ensure that the negative error is within 10%.
AB - Effective width (b eff) has been widely used by designers, and several specifications can be selected. However, insufficient research has been conducted on the b eff of single and twin I-beam composite girders. Thus, finite element (FE) models, calibrated by the experiment, were used to study the effects of slab thickness, web position, interaction degree (ID) of shear studs, width-to-span ratio, and their coupling effects on b eff. Different loading types and two definitions of b eff were elaborated. The FE results were compared with specifications in Eurocode 4 (EC4) and AASHTO LRFD bridge design specifications (AASHTO). The following results were obtained. The modeling agrees with the experiment. The critical steel height-to-slab thickness ratio is around 4. When the ratio deviates from the critical value, b eff is reduced with the increase of slab thickness. ID has a slight influence on b eff. b eff changes within 10% when ID changes within 10%. The maximum b eff can be obtained when the web spacing-to-physical width ratio is 1/2. The decrease of web spacing brings a maximum reduction of 14% on b eff, whereas increasing web spacing results in a maximum reduction of 70% for twin I-beam. The coupled effect of web position and slab thickness is limited. The maximum difference is 25%. Recommended equations were proposed to evaluate b eff for single I-beam and twin I-beam composite girders based on the specifications in EC4 and AASHTO, which can ensure that the negative error is within 10%.
KW - Composite girder
KW - Coupling effect
KW - Effective width
KW - Finite element
KW - Width-to-span ratio
UR - http://www.scopus.com/inward/record.url?scp=85153772734&partnerID=8YFLogxK
U2 - 10.1007/s12205-023-1568-9
DO - 10.1007/s12205-023-1568-9
M3 - Article
AN - SCOPUS:85153772734
SN - 1226-7988
VL - 27
SP - 2559
EP - 2569
JO - KSCE Journal of Civil Engineering
JF - KSCE Journal of Civil Engineering
IS - 6
ER -