Session Start Date

10-15-1998

Abstract

This paper is the second paper by the authors on the subject of the behavior of cold formed steel hat sections in bending with multiple intermediate longitudinal stiffeners. The first paper, also contained in these Proceedings, deals with the test results only (Acharya and Schuster, 1998). Presented in this paper is the analysis associated with the test program that was conducted at the University of Waterloo. The main objective was to develop a consistently accurate and practical method of predicting the ultimate bending strength of sections that fail in overall plate buckling. Recent testing carried out by previous researchers indicates that the bending resistance of multiple stiffened cold formed steel members which fail in overall plate buckling is too conservatively predicted by the current Canadian design standard (S136-94). These researchers have also shown that the American design specification (A1S1 96) is also unconservative for the same sections. This investigation primarily includes a theoretical study that is substantiated with the experimental data summarized in the first paper. The current North American design methods were evaluated with respect to their ability to predict the strength of the test specimens. Based on the work by Lind (Lind, 1973), which is shown to adequately predict the strength of sections that experience overall plate buckling, an alternate design method for strength determination is presented.

Department(s)

Civil, Architectural and Environmental Engineering

Research Center/Lab(s)

Wei-Wen Yu Center for Cold-Formed Steel Structures

Meeting Name

14th International Specialty Conference on Cold-Formed Steel Structures

Publisher

University of Missouri--Rolla

Publication Date

10-15-1998

Document Version

Final Version

Rights

© 1998 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Oct 15th, 12:00 AM

Analysis of Hat Sections with Multiple Intermediate Longitudinal Stiffeners

This paper is the second paper by the authors on the subject of the behavior of cold formed steel hat sections in bending with multiple intermediate longitudinal stiffeners. The first paper, also contained in these Proceedings, deals with the test results only (Acharya and Schuster, 1998). Presented in this paper is the analysis associated with the test program that was conducted at the University of Waterloo. The main objective was to develop a consistently accurate and practical method of predicting the ultimate bending strength of sections that fail in overall plate buckling. Recent testing carried out by previous researchers indicates that the bending resistance of multiple stiffened cold formed steel members which fail in overall plate buckling is too conservatively predicted by the current Canadian design standard (S136-94). These researchers have also shown that the American design specification (A1S1 96) is also unconservative for the same sections. This investigation primarily includes a theoretical study that is substantiated with the experimental data summarized in the first paper. The current North American design methods were evaluated with respect to their ability to predict the strength of the test specimens. Based on the work by Lind (Lind, 1973), which is shown to adequately predict the strength of sections that experience overall plate buckling, an alternate design method for strength determination is presented.