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A study on application of high strength steel SM570 in bridge piers with stiffened box section under cyclic loading

  • Kang, Lan (School of Civil Engineering and Transportation, South China University of Technology) ;
  • Suzuki, Motoya (Department of Civil Engineering, Meijo University) ;
  • Ge, Hanbin (Department of Civil Engineering, Meijo University)
  • Received : 2017.09.29
  • Accepted : 2017.12.20
  • Published : 2018.03.10

Abstract

Although a lot of experimental and analytical investigations have been carried out for steel bridge piers made of SS400 and SM490, the formulas available for SS400 and SM490 are not suitable for evaluating ultimate load and deformation capacities of steel bridge piers made of high strength steel (HSS) SM570. The effect of various parameters is investigated in this paper, including plate width-to-thickness ratio, column slenderness ratio and axial compression force ratio, on the ultimate load and deformation capacities of steel bridge box piers made of SM570 steel subjected to cyclic loading. The elasto-plastic behavior of the steel bridge piers under cyclic loads is simulated through plastic large deformation finite element analysis, in which a modified two-surface model (M2SM) including cyclic hardening is employed to trace the material nonlinearity. An extensive parametric study is conducted to study the influences of structural parameters on the ultimate load and deformation capacities. Based on these analytical investigations, new formulas for predicting ultimate load and deformation capacities of steel bridge piers made of SM570 are proposed. This study extends the ultimate load and deformation capacities evaluation of steel bridge piers from SS400, SM490 steels to SM570 steel, and provides some useful suggestions.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

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