Analytical approach for shear lag in welded tension members

2006 ◽  
Vol 33 (4) ◽  
pp. 384-394 ◽  
Author(s):  
Georges Abi-Saad ◽  
Dominique Bauer
Keyword(s):  
Laboratory Tests ◽  
Analytical Approach ◽  
Steel Structures ◽  
Ultimate Stress ◽  
Shear Lag ◽  
Gusset Plates ◽  
Lag Effects ◽  
Elastic Plastic ◽  
Tension Members ◽  
Longitudinal Welds

The authors propose an analytical approach for calculating the reduction in strength of steel tension members due to shear lag effects. The approach is based on an assumed distribution of forces along inclined lines in the member ends, somewhat similar to the Whitmore concept used with gusset plates for bracing members. The method is demonstrated for a basic weld in shear at elastic, plastic, and ultimate stress levels. The method is then compared with the recommendations contained in standard CAN/CSA-S16-01 for elements connected by a single longitudinal weld and for elements connected by longitudinal welds along two parallel edges. The predicted strength of tension members with welded connections is compared with results from several laboratory tests. The proposed method could be used for calculating the reduction in strength due to shear lag effects of tension members with different sections.Key words: steel structures, trusses, tension members, welded connections, shear lag, Whitmore.

The shear lag effects on welded steel single angle tension members

2009 ◽  
Vol 65 (5) ◽  
pp. 1171-1186 ◽  
Author(s):  
H.T. Zhu, ◽  
Michael C.H. Yam ◽  
Angus C.C. Lam ◽  
V.P. Iu
Keyword(s):  
Shear Lag ◽  
Welded Steel ◽  
Lag Effects ◽  
Tension Members

scholarly journals Shear Lag Effects in Angles Welded at Both Legs

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Mohammad Abedin ◽  
Shervin Maleki ◽  
Nafiseh Kiani ◽  
Esmail Shahrokhinasab
Keyword(s):  
Numerical Methods ◽  
Plate Thickness ◽  
Numerical Analyses ◽  
Shear Lag ◽  
Gusset Plate ◽  
Lag Effects ◽  
Free Length ◽  
Steel Sections ◽  
Connection Length ◽  
Tension Members

The shear lag phenomenon is known to reduce the tensile capacity of tension members. There are various parameters affecting shear lag that have not been considered before. In addition, previous studies have been conducted mainly on single steel sections. Using numerical methods, the present study investigates the effects of relevant parameters on shear lag in single- and double-angle sections welded at both legs. The studied parameters are connection eccentricity, connection length, gusset plate thickness, member-free length, and connection-free length. The results of the numerical analyses show that, in single-angle connections, the effects of connection length, connection eccentricity, and gusset plate thickness are more pronounced, while in double-angle connections the last parameter is not very critical. Comparing the results with the AISC-LRFD predictions, it is concluded that the specification relations are conservative in most cases. In order to reduce the overconservatism, some new equations for shear lag estimate are introduced.

Shear lag in slotted HSS tension members

1996 ◽  
Vol 23 (6) ◽  
pp. 1350-1354 ◽  
Author(s):  
R. M. Korol
Keyword(s):  
Reduction Factor ◽  
Shear Lag ◽  
Distance Ratio ◽  
Gusset Plates ◽  
Braced Frame ◽  
Factor Design ◽  
Frame Construction ◽  
Tension Members ◽  
Hollow Structural Section ◽  
Hollow Structural Sections

A research program was undertaken to study the shear-lag phenomenon for slotted hollow structural section (HSS) tension members having gusset plates welded at the ends, a commonly employed detail in braced frame construction. The purpose of this study was to establish whether the shear-lag reduction factor indeed involves only the weld length to weld distance ratio, or if other parameters also influence connection strength and behaviour. Key words: shear lag, slotted members, reduction factor, design, experiments, hollow structural sections.

Strength of slotted tubular tension members

1998 ◽  
Vol 25 (6) ◽  
pp. 982-991 ◽  
Author(s):  
J J. Roger Cheng ◽  
G L Kulak ◽  
Heng-Aik Khoo
Keyword(s):  
Equivalent Plastic Strain ◽  
Experimental Program ◽  
Shear Lag ◽  
Element Analysis ◽  
Gusset Plates ◽  
Gusset Plate ◽  
Lag Effect ◽  
Load Carrying ◽  
Tension Members ◽  
Hollow Structural Section

An experimental program and associated numerical analysis were undertaken to study the shear-lag effect in round hollow structural section (HSS) tension members that are welded to gusset plates at their ends. The connection is made by slotting the tube longitudinally, inserting the gusset plate, and then placing longitudinal fillet welds at the tube-gusset interface. A total of nine specimens with three different tube sizes (HSS 102 × 6.4, HSS 102 × 4.8, and HSS 219 × 8.0) and various weld lengths were tested in the program. Most of the specimens failed by fracture of the tube somewhere between the two gusset plates, and there was considerable ductility prior to fracture. Most importantly, there was no reduction in the effective net area for the tested specimens, even with a weld length as little as 80% of the distance between the welds. Numerical analyses of the connections were carried out using an elastoplastic model and measured material properties. The studies showed that the restraint provided by the gusset plate at the slotted end effectively increases the load-carrying capacity of the tube as compared with that of the unrestrained portion of the member. In the analysis, fracture is assumed to have occurred when the equivalent plastic strain reaches a critical value. The test results are discussed in light of the requirements in the Canadian standard for design of steel structures.Key words: connections, steel, shear lag, finite element analysis, gusset plates, hollow structural section, tension, welds.

New provisions for shear lag in steel tension members

1996 ◽  
Vol 23 (1) ◽  
pp. 305-309
Author(s):  
Charles Albert
Keyword(s):  
Key Words ◽  
Parametric Study ◽  
Single Line ◽  
Shear Lag ◽  
Design Rules ◽  
Tension Members ◽  
Longitudinal Welds

The Canadian Standards Association Standard CAN/CSA-S16.1-94 provides new design rules for calculating the effective net area of steel tension members connected by a single line of weld, or by a combination of transverse and longitudinal welds. The significance of the new provisions on the design of angles is examined by means of a parametric study. Key words: shear lag, tension members, welded connections.

scholarly journals Experimental Study on the Behavior of Tension Member Under Rupture

2021 ◽  
Keyword(s):  
Experimental Study ◽  
Tensile Force ◽  
Steel Structure ◽  
Steel Structures ◽  
Structural Members ◽  
Steel Members ◽  
Tension Member ◽  
Strong Relation ◽  
Almost All ◽  
Tension Members

Abstract. A steel structure is naturally lighter than a comparable concrete construction because of the higher strength and firmness of steel. Nowadays, the growth of steel structures in India is enormous. There are so many advantages in adopting the steel as structural members. Almost all high-rise buildings, warehouses & go-downs are steel structures and even some of the commercial buildings are made of steel. Tension members are the elements that are subjected to direct axial load which tends in the elongation of the structural members. Even today bolted connections play a major role in the connection of hot rolled structural steel members. In this experimental study the behavior of tension members (TM) such as plates, angles & channels have been studied under axial tensile force. There is strong relation between pitch and gauge (with in the specified limit as per IS 800:2007) in determining the rupture failure plane. In this study we intensively tested the behaviour of TM for different fasteners pattern by changing the pitch, gauge, end & edge distance and by adopting the different patterns or arrangements of bolted connection in it.

Investigation of shear-lag in slotted HSS tension members

2021 ◽  
pp. 473-479
Author(s):  
R.M. Korol ◽  
F.A. Mirza ◽  
M.Y. Mirza
Keyword(s):  
Shear Lag ◽  
Tension Members

GBT Analysis of Steel-Concrete Composite Beams: Recent Developments

2020 ◽  
Vol 20 (13) ◽  
pp. 2041007
Author(s):  
Rodrigo Gonçalves ◽  
Dinar Camotim ◽  
David Henriques
Keyword(s):  
Finite Element ◽  
Beam Theory ◽  
Composite Beams ◽  
Arbitrary Cross Section ◽  
Mode Shapes ◽  
Shear Lag ◽  
Buckling Mode ◽  
Concrete Cracking ◽  
Lag Effects ◽  
Recent Developments

This paper reports the most recent developments concerning Generalized Beam Theory (GBT) formulations, and corresponding finite element implementations, for steel-concrete composite beams. These formulations are able to perform the following types of analysis: (i) materially nonlinear analysis, to calculate the beam load-displacement response, up to collapse, including steel plasticity, concrete cracking/crushing and shear lag effects, (ii) bifurcation (linear stability) analysis, to obtain local/distortional bifurcation loads and buckling mode shapes of beams subjected to negative (hogging) bending, accounting for shear lag and concrete cracking effects and (iii) long-term service analysis including creep, cracking and arbitrary cross-section deformation (which includes shear lag) effects. The potential (computational efficiency and accuracy) of the proposed GBT-based finite elements is illustrated through several numerical examples. For comparison purposes, results obtained with standard finite strip and shell/brick finite element models are provided.

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