Alternative Title

Civil Engineering Study 95-5

Abstract

This first progress report reviews earlier research on ASTM A653 Structural Grade 80 steel (formerly ASTM A446 Grade E) and similar steels used for cold-formed structural members, and summarizes the results of the tension coupon tests recently carried out at the University of Missouri-Rolla. The review focuses on experimental study and structural performance of members made of such steels, including ultimate strength of structural members as affected by the increases in yield strength of base metal, reduction in ductility of base metal, thickness of base metal, flat width-to-thickness ratio of elements, type of deck profile, and base metal rolling direction. The cold-formed structural members considered in this study include beams, decks, connections, and columns. The results obtained from the tension coupon tests include the 0.2% offset yield strength and tensile strength, stress-strain relationship, 2-inch gage length percent elongation, local and uniform percent elongations of the A653 Structural Grade 80 steel in two orthotropic directions. It is noted that limited information on the A653 Structural Grade 80 steel and similar steels is available in published literature. Searching for such information continues. Available test data and evaluation of the data indicate that cold-formed structural members (mainly beams and connections) made of the A653 Structural Grade 80 steel may be designed based on a stress level that is higher than 75% of the specified yield and tensile strengths of the steel. The tension coupon tests indicated that the 0.2% offset yield and tensile strengths of the A653 Structural Grade 80 steel both in the rolling direction and perpendicular to the rolling direction increase with the decreases in thickness of steel sheets, while the ductility of the steel decreases with the decreases in thickness of steel sheets. The material properties perpendicular to the rolling direction are significantly different from those in the rolling direction.

Department(s)

Civil, Architectural and Environmental Engineering

Research Center/Laboratory(s)

Wei-Wen Yu Center for Cold-Formed Steel Structures

Sponsor(s)

American Iron and Steel Institute

Appears In

Cold-Formed Steel Series

Publisher

Missouri University of Science and Technology

Publication Date

10-1-1995

Document Version

Final Version

Rights

© 1995 Missouri University of Science and Technology, All rights reserved.

Comments

First Progress Report

Document Type

Report - Technical

File Type

text

Language

English


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