보강판의 국부변형 손상과 잔류 강도의 실험연구

• Published in: 大韓造船學會 論文集 Vol. 57; no. 4; pp. 182 - 190
• Main Authors: 박상현(Sang-Hyun Park), 신현경(Hyun Kyoung Shin), 강응순(Eungsoon Kang), 조상래(Sang-Rai Cho), 장용수(Yong-Su Jang), 백남기(Nam-Ki Baek), 박동기(Dong-Ki Park)
• Format: Journal Article
• Language: Korean
• Published: 대한조선학회 2020
• Subjects: 조선공학; Residual strength(잔류강도); Axial compression test(축압축 실험); Stiffened plate(보강판); Impact test(충격 실험); Denting damage(국부변형 손상)
• ISSN: 1225-1143; 2287-7355
• DOI: 10.3744/SNAK.2020.57.4.182

This study reports a series of drop impact tests performed to generate denting damages on stiffened plates and their residual ultimate strength tests under axial compression. The models were fabricated of general structural steel, and each model has six longitudinal stiffeners and two transverse frames. Among six fabricated models, four were damaged, and two were left intact for reference. To investigate the effects of collision velocity and impact location on the extent of damage, the drop height and the impact location were changed in each impact test. After performing the collision tests, the ultimate axial compression tests were conducted to investigate the residual strengths of the damaged stiffened plates. Finite element analyses were also carried out using a commercial package Abaqus/Explicit. The material properties obtained from a quasi-static tensile tests were used, and the strain-rate sensitivity was considered. After importing the collision simulation results, the ultimate strength calculations were carried out and their results were compared with the test data for the validation of the finite element analysis method.