Corner strength enhancement of high strength cold-formed steel at normal room and elevated temperatures

• Published in: Journal of Zhejiang University. A. Science Vol. 9; no. 9; pp. 1251 - 1257
• Main Authors: Chen, Ju, Jin, Wei-liang
• Format: Journal Article
• Language: English
• Published: Hangzhou Zhejiang University Press 01.09.2008; Department of Civil Engineering,Zhejiang University,Hangzhou 310027,China
• Subjects: Civil Engineering; Classical and Continuum Physics; Engineering; Industrial Chemistry/Chemical Engineering; Mechanical Engineering; 建筑材料; 成品率; 温度控制; 高强度钢精; Elevated temperatures; Yield strength; Cold-formed steel; Corner; TU5; High strength steel; Comer
• ISSN: 1673-565X; 1862-1775
• DOI: 10.1631/jzus.A0720056

In this study, the suitability of current design methods for the 0.2% proof yield strength of the comer regions for high strength cold-formed steel at normal room temperature was investigated. The current standard predictions are generally accurate for outer comer specimen but conservative for inner comer specimen. Based on the experimental results, an analytical model to predict the comer strength of high strength cold-formed steel at normal room temperature was also proposed. The comparison indicated that the proposed model predicted well the comer strength of high strength cold-formed steel not only at normal room temperature but also at elevated temperatures. It is shown that the predictions obtained from the proposed model agree well with the test results. Generally the comer strength enhancement of high strength cold-formed steel decreases when the temperature increases.