Masters Theses

Craig Uphoff

Abstract

"An experimental investigation of the web crippling limit state was conducted on single web cold-formed steel flexural members with circular web openings in order to aid in the enhancement of the current AISI ( 1986) Specification provisions for web crippling. The current AISI ASD Specification (1986) and AISI LRFD Specification (1991a) have no specific design provisions for the reduction in web crippling capacity of flexural members caused by the presence of web openings.

The test specimens, constructed of C-sections, were subjected to a concentrated load applied to one flange which satisfied the AISI criteria for End-One-Flange loading. The research findings resulted in a new reduction factor equation which enveloped a wider range of values for the cross-section geometric parameters. The previous reduction factor equation developed by Langan, LaBoube, and Yu (1994) was originally developed for web openings that were rectangular with fillet comers. During the analysis of the current study, the Langan, LaBoube, and Yu reduction factor equation was found to be conservative for larger a/h values. The new reduction factor results in an equation to obtain the reduction in web crippling capacity for sections with web openings. The web crippling capacity is considered for the web capacity without the effects of the bending moment.

The final conclusions resulting from the experimental investigation were used to develop recommended design standards"--Abstract, p. iii

Advisor(s)

Roger A. LaBoube

Committee Member(s)

Wei-Wen Yu
Douglas R. Carroll

Department(s)

Civil, Architectural and Environmental Engineering

Degree Name

M.S. in Civil Engineering

Publisher

University of Missouri--Rolla

Publication Date

Summer 1996

Pagination

x, 67 pages

Note about bibliography

includes bibliographical references (pages 65-66)

Rights

© 1996 Craig Andrew Uphoff, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Thesis Number

T 7203

Print OCLC #

36428728

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