The Compressive Strength of Longitudinally Stiffened Plates Undergoing Local and Distortional Buckling

국부좌굴과 뒤틀림좌굴이 발생하는 종방향 보강재로 보강된 강판의 압축강도

  • 박호상 (평화엔지니어링 토목구조사업부) ;
  • 서상정 (영남대학교 건설환경공학과) ;
  • 권영봉 (영남대학교 건설환경공학과)
  • Received : 2010.03.12
  • Accepted : 2010.05.24
  • Published : 2010.06.27

Abstract

This paper describes an experimental research on the structural behavior and the ultimate strength of longitudinally stiffened plates subjected to local, distortional, or mixed-mode buckling under compression. The stiffened plate undergoes local, distortional, or interactive local-distortional buckling according to the flexural rigidity of the plate's longitudinal stiffeners and the width-thickness ratios of the sub-panels of the stiffened plate. A significant post-buckling strength in the local and distortional modes affects the ultimate strength of the longitudinally stiffened plate. Compression tests were conducted on stiffened plates that were fabricated from 4mm-thick SM400 steel plates with a nominal yield stress of 235MPa. A simple strength formula for the Direct Strength Method based on the test results was proposed. This paper proves that the Direct Strength Method can properly predict the ultimate strength of stiffened plates when the local buckling and distortional buckling occur simultaneously or nearly simultaneously.

Acknowledgement

Grant : 기초연구사업-일반연구자지원과제

Supported by : 한국연구재단

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