Comparison of inelastic moment resistances of rolled steel beams based on different specifications and a numerical study

  • Cao Thi Mai Huong

    Faculty of Civil Engineering, University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
  • Nguyen Duy Tien

    Faculty of Civil Engineering, University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
  • Pham Van Phe

    Faculty of Civil Engineering, University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
  • Bui Tien Thanh

    Faculty of Civil Engineering, University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
  • Nguyen Duc Binh

    Faculty of Civil Engineering, University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
Email: phe.phamvan@utc.edu.vn
Từ khóa: inelastic buckling, moment resistance, load height position, residual stresses, initial imperfection, buckling moment comparison

Tóm tắt

The inelastic buckling resistances of wide flange beams are strongly influenced by residual stresses and initial imperfections. However, the resistances as evaluated from simple solutions presented in several popular design specifications are found to be considerably different. The present study thus develop a numerical solution in ABAQUS software to investigate the inelastic buckling moment resistances of rolled steel beams with compact sections and subjected to the effects of residual stresses and initial imperfections. The residual stresses are taken as provided in AISC, CSA S16, EC 3 specifications, while the initial imperfections are taken as the first lateral-torsional buckling mode with a magnitude limited in AISC, CSA specifications. Through comparisons between the specifications and the numerical solutions, one observes a significant difference between the moment resistances predicted by the specifications, in which the AISC predicts the highest values, while the EC 3 predicts the lowest moments. The moment resistances based on the present numerical models lie between the EC 3 and CSA solutions and they are relatively close to EC 3 solutions. Effects of load height positions on the inelastic buckling moment resistances are significant, as investigated in the present study

Tài liệu tham khảo

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