TY - GEN
T1 - Reliability analysis for stability bearing capacity of CFST arches
AU - Jiang, W.
AU - Lu, D. G.
PY - 2013
Y1 - 2013
N2 - Concrete-filled steel tubular (CFST) arch bridges have been widely used as a kind of composite structural type in China in recent years. However, studies on the reliability of this type of bridges are limited. Therefore, reliability levels for stability bearing capacity of CFST arch ribs, which are the main members of CFST arch bridge, are investigated. The limit state functions corresponding to the two kinds of stability are set forth respectively. Seven random variables of material properties, geometric parameters and calculation modes are considered.To perform the reliability analysis for stability bearing capacity of CFST arches, the finite element reliability method (FERM) is utilized. Some benchmark experiments of CFST arches in China are taken as case studies. The reliability indices and sensitivity factors for different instability modes are obtained and verified by the Monte Carlo Simulation (MCS). It is shown by the numerical results that the reliability indices decrease quickly as initial loads increase for different situations, while the sensitivity indices of basic random variables depend on the instability modes. For the bifurcation buckling, the variations of geometry size and elasticity modulus have significant effects, while for the extreme-point instability, the effects of material strength and geometry size become significant.
AB - Concrete-filled steel tubular (CFST) arch bridges have been widely used as a kind of composite structural type in China in recent years. However, studies on the reliability of this type of bridges are limited. Therefore, reliability levels for stability bearing capacity of CFST arch ribs, which are the main members of CFST arch bridge, are investigated. The limit state functions corresponding to the two kinds of stability are set forth respectively. Seven random variables of material properties, geometric parameters and calculation modes are considered.To perform the reliability analysis for stability bearing capacity of CFST arches, the finite element reliability method (FERM) is utilized. Some benchmark experiments of CFST arches in China are taken as case studies. The reliability indices and sensitivity factors for different instability modes are obtained and verified by the Monte Carlo Simulation (MCS). It is shown by the numerical results that the reliability indices decrease quickly as initial loads increase for different situations, while the sensitivity indices of basic random variables depend on the instability modes. For the bifurcation buckling, the variations of geometry size and elasticity modulus have significant effects, while for the extreme-point instability, the effects of material strength and geometry size become significant.
UR - https://www.scopus.com/pages/publications/84892408037
M3 - 会议稿件
AN - SCOPUS:84892408037
SN - 9781138000865
T3 - Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures - Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013
SP - 5265
EP - 5270
BT - Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures - Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013
T2 - 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013
Y2 - 16 June 2013 through 20 June 2013
ER -