2011 Fiscal Year Final Research Report

Improvement on steel dynamic hysteretic model and evolution to the seismic design of steel buildings

Research Project

Project/Area Number	22860014
Research Category	Grant-in-Aid for Research Activity Start-up
Allocation Type	Single-year Grants
Research Field	Structural engineering/Earthquake engineering/Maintenance management engineering
Research Institution	Chiba University
Principal Investigator	SHIMADA Yuko 千葉大学, 大学院・工学研究科, 助教 (90586554)
Project Period (FY)	2010 – 2011
Keywords	歪速度 / 動的特性 / 履歴モデル / 繰返し挙動 / エネルギー
Research Abstract	This study is consideration of dynamic hysteretic characteristics based on the dynamic cyclic loading tests of structural steel and evaluation of strain-rate effect in seismic performance of steel buildings. First, I have conducted a series of dynamic cyclic loading test of steel which popularly used as hysteretic damper, column, and beam. Regardless of steel kinds, yield strength glowed up when strain-rate was increased. However, the glow of strength was stopped in large plastic deformation. Strain-rate was affected only several cycles after loading have started. Second, I made a database of steel performances affected strain-rate base on previous experimental studies.