Negative bending resistance of HPS70W girders

This paper investigates the influence of material and geometric parameters on the flexural behavior of I-girders fabricated from Grade 70W high performance steel. Three cross-section geometric parameters are considered: compression flange slenderness ( b fc/2 t fc), web slenderness (2 D cp/ t w), an...

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Bibliographic Details
Published in:Journal of constructional steel research 2000, Vol.53 (1), p.1-31
Main Authors: Barth, Karl E, White, Donald W, Bobb, Betsy M
Format: Article
Language:English
Subjects:
Finite element analysis
High performance steel
Inelastic design
Plate girders
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Summary:This paper investigates the influence of material and geometric parameters on the flexural behavior of I-girders fabricated from Grade 70W high performance steel. Three cross-section geometric parameters are considered: compression flange slenderness ( b fc/2 t fc), web slenderness (2 D cp/ t w), and the ratio of the web depth to the compression flange width ( D/ b fc). Also, three material parameters are studied: the yield ratio ( F y/ F u), the ratio of the strain-hardening and yield strains ( ϵ st/ ϵ y), and the strain-hardening modulus ( E st). The parametric studies are conducted using full non-linear shell finite element models of the hypothetical physical girders. The resulting moment–rotation curves obtained from these simulated experiments are compared with simplified moment–plastic rotation equations that have been developed in previous research, and with current AASHTO specification strength equations.
ISSN:0143-974X
1873-5983
DOI:10.1016/S0143-974X(99)00037-1