Study on the coupling of buckling and fracture of steel structural members

2014 Fiscal Year Final Research Report

• Project/Area Number: 23246097
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Building structures/materials
• Research Institution: The University of Tokyo
• Principal Investigator: KUWAMURA Hitoshi 東京大学, 工学(系)研究科(研究院), 教授 (20234635)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: 鋼構造 / 座屈 / 破壊 / 塑性変形能力 / 耐震設計

Outline of Final Research Achievements

The major findings are as follows: a mathematical model for the entire mechanical behaviors of structural steels subjected to large plastic strain reversals was developed; a numerical simulator in which the model was incorporated was established; the simulator was confirmed to reenact the actual post-buckling behaviors by comparing the simulation with experiment; a mathematical model for cracking behaviors was established and its accuracy was verified by material tests; the simulator incorporating the models of plastic behavior as well as cracking behavior was found well follow the actual coupling behaviors of buckling and fracture of steel tubular columns subjected to cyclic loadings; and the simulator installed in a seismic response analysis demonstrated that the ductility or the deformation capacity up to structural failure is decreased when the coupling takes place in comparison with the failure due to buckling alone.

Free Research Field

建築構造