TY - JOUR
T1 - Effect of cross-sectional rigidity on intermediate diaphragm spacing of steel-box girder bridges
AU - Lee, Jeonghwa
AU - Kim, Seungjun
AU - Kang, Young Jong
N1 - Funding Information:
This research was supported by the Basic Science Research Program under the National Research Foundation of Korea (NRF) funded by the Ministry of Education . (No. 2019R1I1A1A01059684 ).
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2022/1
Y1 - 2022/1
N2 - To control the distortion of box girder bridges and minimize the distortional stresses due to the torsional behavior when eccentric live loads are applied, it is necessary to install intermediate diaphragms in the box sections in the design of box girder bridges. This study estimated the distortional bi-moments and stresses of single-span rectangular steel box girder bridges by conducting a three-dimensional finite element analysis (FEA) considering various cross-sectional rigidities of the box girder sections. Based on the FEA, improved design equations for determining the distortional stresses and the appropriate intermediate diaphragm spacing were established considering various design parameters, such as cross-sectional rigidity, live load combination, normal stress ratios, and magnitude of the torsional moment. Finally, design recommendations were presented for the intermediate diaphragm spacing based on various design parameters.
AB - To control the distortion of box girder bridges and minimize the distortional stresses due to the torsional behavior when eccentric live loads are applied, it is necessary to install intermediate diaphragms in the box sections in the design of box girder bridges. This study estimated the distortional bi-moments and stresses of single-span rectangular steel box girder bridges by conducting a three-dimensional finite element analysis (FEA) considering various cross-sectional rigidities of the box girder sections. Based on the FEA, improved design equations for determining the distortional stresses and the appropriate intermediate diaphragm spacing were established considering various design parameters, such as cross-sectional rigidity, live load combination, normal stress ratios, and magnitude of the torsional moment. Finally, design recommendations were presented for the intermediate diaphragm spacing based on various design parameters.
KW - Cross-sectional rigidity
KW - Distortion
KW - Distortional warping normal stress
KW - Intermediate diaphragm spacing
KW - Rectangular box girder bridges
UR - http://www.scopus.com/inward/record.url?scp=85118332172&partnerID=8YFLogxK
U2 - 10.1016/j.jcsr.2021.107006
DO - 10.1016/j.jcsr.2021.107006
M3 - Article
AN - SCOPUS:85118332172
SN - 0143-974X
VL - 188
JO - Journal of Constructional Steel Research
JF - Journal of Constructional Steel Research
M1 - 107006
ER -