TY - JOUR
T1 - A New Bilinear Resistance Algorithm to Analyze the Track-Bridge Interaction on Long-Span Steel Bridge under Thermal Action
AU - Dai, Gonglian
AU - Chen, Guorong
AU - Zheng, Rongrong
AU - Chen, Y. Frank
N1 - Funding Information:
This work is supported by the China Railway Corporation (Project No. 2017G006-N), the Fundamental Research Funds for the Central Universities of Central South University (Project No. 2017zzts151), and China Scholarship Council (Fellowship No. 201706370112). And thanks Mr. Guo, Hui for offering the helpful photos.
Publisher Copyright:
© 2019 American Society of Civil Engineers.
PY - 2020/2/1
Y1 - 2020/2/1
N2 - In this paper, an analytical algorithm, based on the bilinear resistance model, was proposed to analyze the track-bridge interaction on long-span steel bridges under thermal action. Calculation results show that the proposed algorithm is more accurate than previous analytical algorithms and can achieve nearly the same accuracy as the finite-element method (FEM), but is more efficient than FEM. Based on the algorithm, this paper explained why the longitudinal force (LF) in the middle of the bridges doesn't increase as bridge length increases, then proposed a manual LF calculation formula. Researchers and engineers can use this formula to easily estimate the maximum LF on bridges which have rail expansion devices (REDs). A parametric study was performed. The result shows that LF is not a matter of concern on the bridges with REDs. Besides, the relationships between track resistance distribution, track-bridge relative displacement and boundary conditions were revealed, and the difference between LF on bridge and on embankment were discussed. The outcomes of this paper can be applied to long-span centrosymmetric continuous bridge as well as cable-stayed bridges.
AB - In this paper, an analytical algorithm, based on the bilinear resistance model, was proposed to analyze the track-bridge interaction on long-span steel bridges under thermal action. Calculation results show that the proposed algorithm is more accurate than previous analytical algorithms and can achieve nearly the same accuracy as the finite-element method (FEM), but is more efficient than FEM. Based on the algorithm, this paper explained why the longitudinal force (LF) in the middle of the bridges doesn't increase as bridge length increases, then proposed a manual LF calculation formula. Researchers and engineers can use this formula to easily estimate the maximum LF on bridges which have rail expansion devices (REDs). A parametric study was performed. The result shows that LF is not a matter of concern on the bridges with REDs. Besides, the relationships between track resistance distribution, track-bridge relative displacement and boundary conditions were revealed, and the difference between LF on bridge and on embankment were discussed. The outcomes of this paper can be applied to long-span centrosymmetric continuous bridge as well as cable-stayed bridges.
UR - http://www.scopus.com/inward/record.url?scp=85075483695&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85075483695&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)BE.1943-5592.0001505
DO - 10.1061/(ASCE)BE.1943-5592.0001505
M3 - Article
AN - SCOPUS:85075483695
SN - 1084-0702
VL - 25
JO - Journal of Bridge Engineering
JF - Journal of Bridge Engineering
IS - 2
M1 - 04019125
ER -