Session Start Date

10-15-1998

Abstract

A total of 148 web crippling tests were conducted using high-strength, low-ductility Structural Grade 80 of ASTM A653 steel (former ASTM A446 Grade E steel) and tests results were evaluated along with additional 114 web crippling tests which were reported in 1986 as part of a project on Design of Automotive Structural Components Using High-Strength Sheet Steels. Four loading conditions, namely End-One-Flange (EOF),lnterior-One-Flange (IOF), End-Two-Flange (ETF), and Interior-Two-Flange (ITF) conditions, were considered in the web crippling tests. Test results indicate that the tested ultimate loads for the four loading conditions were higher than the predicted loads using the AISI Specifications for the yield strength of the steels exceeding 80 ksi (551.6 MPa). The ratio of the tested ultimate load to the calculated load tends to increase with increase in the yield strength of the steels beyond 80 ksi. New modified kC₁ and kC₃, factors were developed based on the 262 web crippling tests which included the following parameters: the yield strength Fy ranged from 58.2 ksi (401.3 MPa) to 165.1 ksi (1138.4 MPa), h/t ratio from 25.99 to 208.19, R/t ratio from 1.496 to 5.696, N/t ratio from 22.70 to 88.24, N/h ratio from 0.17 to 2.02, thickness of steel sheets from 0.017" to 0.088" (0.43 to 2.24 mm), and the angle between plane of web and plane of bearing surface from 59.5 to 90 degree. Reasonable agreement was found between the tested ultimate loads and the predicted loads using the new modified kC₁ and kC₃, factors.

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

Web Crippling Strength of Members Using High-strength Steels

A total of 148 web crippling tests were conducted using high-strength, low-ductility Structural Grade 80 of ASTM A653 steel (former ASTM A446 Grade E steel) and tests results were evaluated along with additional 114 web crippling tests which were reported in 1986 as part of a project on Design of Automotive Structural Components Using High-Strength Sheet Steels. Four loading conditions, namely End-One-Flange (EOF),lnterior-One-Flange (IOF), End-Two-Flange (ETF), and Interior-Two-Flange (ITF) conditions, were considered in the web crippling tests. Test results indicate that the tested ultimate loads for the four loading conditions were higher than the predicted loads using the AISI Specifications for the yield strength of the steels exceeding 80 ksi (551.6 MPa). The ratio of the tested ultimate load to the calculated load tends to increase with increase in the yield strength of the steels beyond 80 ksi. New modified kC₁ and kC₃, factors were developed based on the 262 web crippling tests which included the following parameters: the yield strength Fy ranged from 58.2 ksi (401.3 MPa) to 165.1 ksi (1138.4 MPa), h/t ratio from 25.99 to 208.19, R/t ratio from 1.496 to 5.696, N/t ratio from 22.70 to 88.24, N/h ratio from 0.17 to 2.02, thickness of steel sheets from 0.017" to 0.088" (0.43 to 2.24 mm), and the angle between plane of web and plane of bearing surface from 59.5 to 90 degree. Reasonable agreement was found between the tested ultimate loads and the predicted loads using the new modified kC₁ and kC₃, factors.