Advanced Steel Construction

Vol. 14, No. 4, pp. 589-605(2018)


SHEAR LAG FACTORS FOR TENSION ANGLES WITH

UNEQUAL-LENGTH LONGITUDINAL WELDS

 

J. Kent Hsiao1,* and Saurav Shrestha2

1 Professor, Department of Civil and Environmental Engineering,

Southern Illinois University Carbondale, Carbondale, IL, USA

2 Former Graduate Student, Department of Civil and Environmental Engineering,

Southern Illinois University Carbondale, Carbondale, IL, USA

*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it. )

Received: 18 June 2017; Revised: 18 June 2017; Accepted: 19 October 2017

 

DOI:10.18057/IJASC.2018.14.4.4

 

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ABSTRACT

When a tension load is transmitted to some, but not all of the cross-sectional elements of a tension member, the tensile force is not uniformly distributed over the cross-sectional area of the tension member. The non-uniform stress distribution in the tension member is commonly referred to as the out-of-plane shear lag effect. The unequal-length longitudinal welds and the in-plane shear lag effect, however, are not addressed by the current American Institute of Steel Construction (AISC) Specification for the determination of the shear lag factors for tension members other than plates and Hollow Structural Sections (HSS). The purpose of this work is to propose a procedure for the computation of shear lag factors accounting for combined in-plane and out-of-plane shear lag effects on unequal-length longitudinal welded angles. The finite element method using three-dimensional solid elements and nonlinear static analyses accounting for combined material and geometric nonlinearities are conducted in this work to verify the accuracy of the proposed procedure.

 

KEYWORDS

Angle sections, connections, finite element method, geometric nonlinearity, nonlinear analysis, shear lag, stress distribution, welds


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