A study of end plate connections for steel beams

1984 ◽  
Vol 11 (2) ◽  
pp. 139-149 ◽  
Author(s):  
D. J. Laurie Kennedy ◽  
Mona A. Hafez
Keyword(s):  
Steel Beams ◽  
End Plate ◽  
Bolt Holes ◽  
Plate Connections ◽  
The Moment ◽  
Plate Connection ◽  
Analytical Expressions ◽  
Sufficient Strength ◽  
Rotation Behaviour ◽  
The Web

End plates welded transversely to the web of the beam and then bolted to the supporting member should provide effective, simple connections to transmit shear. However, under loading, the end of the beam rotates and moments are developed in the connection. It is essential that the end plate connection be sufficiently flexible so that the factored moment can be attained in the beam without the development of excessive moments in the connection itself. Based on the behaviour of T-sections, where the flange of the T simulates the end plate and the stem simulates the web of the beam, both when the stem is loaded in tension and in compression, analytical procedures have been developed to predict the moment–rotation behaviour of end plate connections. Good agreement has been obtained between the predicted nonlinear moment–rotation curves and the experimental curves for eight connections covering a practical range of end plate thicknesses, gage distances between bolt holes, and connection depths. With the proposed analytical expressions the designer is able to predict the behaviour of a connection to ensure it has sufficient strength and flexibility. Key words: beams, connections, deformation, design, end plates, plates, rotation, shear strength, steel, stresses, tests.

Structural Behaviour of Blind Bolted Connection to Concrete-Filled Steel Tubular Columns

2010 ◽  
Vol 163-167 ◽  
pp. 591-595
Author(s):  
Jing Feng Wang ◽  
Xin Yi Chen ◽  
Lin Hai Han
Keyword(s):  
Analysis Model ◽  
Bolted Connections ◽  
Structural Behaviour ◽  
Tubular Columns ◽  
End Plate ◽  
Moment Resisting ◽  
Strength And Stiffness ◽  
Plate Connections ◽  
The Moment ◽  
Plate Connection

This paper studies structural behaviour of the blind bolted connections to concrete-filled steel tubular columns by a serial of experimental programs, which conducted involving eight sub-assemblages of cruciform beam-to-column joints subjected to monotonic loading and cyclic loading. The moment-rotation hysteretic relationships and failure models of the end plate connections have been measured and analyzed. A simplified analysis model for the blind bolted connections is proposed based on the component method. It is concluded that the blind bolted end plate connection has reasonable strength and stiffness, whilst the rotation capacity of the connection satisfies the ductility requirements for earthquake-resistance in most aseismic regions. This typed joint has excellent seismic performance, so it can be used in the moment-resisting composite frame.

The rotational behaviour of clipped end plate connections

1988 ◽  
Vol 15 (1) ◽  
pp. 117-126 ◽  
Author(s):  
Karl Van Dalen ◽  
John MacIntyre
Keyword(s):  
Rotational Behaviour ◽  
Limit States ◽  
Modified Model ◽  
End Plate ◽  
Rotation Capacity ◽  
Plate Connections ◽  
The Moment ◽  
Rotation Behaviour ◽  
Key Words Beams ◽  
Good Agreement

The rotational behaviour of clipped end plate connections was studied by subjecting nine clipped and three conventional or “unclipped” specimens with varying connection geometry to combined shear and moment and obtaining the corresponding moment–rotation characteristics. It was found that the clipped end plate connections in this investigation had more than adequate rotation capacity to permit an interior beam connected to a supporting member by this type of connection to achieve its full plastic moment, provided the length-to-depth ratio of the beam does not exceed 20. For the range of rotations that would be experienced by clipped end plate connections in a practical structure, a model originally developed to predict the moment–rotation behaviour of conventional shear end plate connections was modified so as to be applicable to clipped end plate connections. Good agreement was obtained between the test values and those predicted by the modified model. No adverse effect on the rotational behaviour of the connections was observed to result from the asymmetry caused by clipping the end plate. Key words: beams, bolts, columns, connections, fillet welds, limit states design, moment, rotation, shear tests, steel construction.

Experimental Investigation of Retrofitted Extended End-Plate Connections

2013 ◽  
Vol 284-287 ◽  
pp. 1330-1333
Author(s):  
Poi Ngian Shek ◽  
M.Md. Tahir ◽  
Cher Siang Tan ◽  
Arizu Sulaiman
Keyword(s):  
Experimental Tests ◽  
Horizontal Shear ◽  
Initial Stiffness ◽  
Component Method ◽  
End Plate ◽  
Theoretical Predictions ◽  
Extended End Plate ◽  
Plate Connections ◽  
The Moment ◽  
Plate Connection

A series of retrofitted extended end-plate connections have been tested experimentally and evaluated using the component method specified in Eurocode 3. The component method decomposed the end-plate connection into several components, including the tension zone, compression zone, vertical and horizontal shear zone that occurred at the bolt, end-plate, beam and column. Based on the theoretical model, the moment resistance and the initial stiffness of a connection can be predicted. Four experimental tests on the retrofitted extended end-plate connections have been conducted to verify the proposed design method. From the experiment tests, all moment resistance of the connections showed good agreement with theoretical predictions, which establish a reliable foundation to predict the moment resistance of the retrofitted end-plate connection. All initial stiffnesses calculated from theoretical predictions do not represent the actual behaviour of tested connection. All tested connections can be classified as partial strength based on EC 3: Part 1.8, in condition the welding capacity is at least 50% higher than the capacity calculated from the component method.

Seismic Performance of Moment End-Plate Connections to CFT Column under Cyclic Loading

2013 ◽  
Vol 680 ◽  
pp. 205-210
Author(s):  
Ikhlas S. Sheet ◽  
Umarani Gunasekaran
Keyword(s):  
Cyclic Loading ◽  
Cyclic Load ◽  
Experimental Program ◽  
Steel Beams ◽  
Welding Zone ◽  
End Plate ◽  
Plate Connections ◽  
Cft Column ◽  
Plastic Rotations ◽  
Plate Connection

An experimental program under cyclic load is performed on two half-scale interior moment end-plate connections to concrete filled tubular (CFT) columns. Flat and curved stiffened extended end-plates were welded to the steel beams in the shop, and bolted on the site to the square and circular CFT column tubes respectively, using steel rods passing through the column. The experimental results demonstrated that both circular and rectangular end-plate connections showed similar performance in a ductile manner and the stiffener elements were effective to form the plastic hinges away from the welding zone, also the proposed curved end-plate connection with rods passing through the column in “X” shape was effective. The test specimens showed a plastic rotations capacity of 0.054 radian.

New Bolted End-Plate Connection Design

2014 ◽  
Vol 1025-1026 ◽  
pp. 878-884
Author(s):  
Jong Wan Hu ◽  
Jun Hyuk Ahn
Keyword(s):  
Design Procedure ◽  
High Strength ◽  
Limit States ◽  
Moment Connections ◽  
End Plate ◽  
Plastic Strength ◽  
Plate Connections ◽  
Plate Connection ◽  
Connection Design

This paper is principally performed to survey end-plate connection are described in the next part based on ideal limit states. The determination of end-plate based on the full plastic strength of the steel beam in accordance with 2001 AISC-LRFD manual and AISC/ANSI 358-05 Specifications. The bolted connections considered herein were performed to include the end-plate component of moment connections. This study is intended to investigate economic design for end-plate connections. In addition, the proposed end-plate model is evaluated by comparing the required factored bolt strength. The end-plates using 8 high strength bolts with wider gages demonstrated this design. The equations belonging to the step-by-step design procedure are described based on complete proving of design. Finally, new design methodology is applied to end-plate connections suggested in this study.

Discussion: Standardized flexible end plate connections for steel beams

1987 ◽  
Vol 14 (1) ◽  
pp. 136-138 ◽  
Author(s):  
John R. MacIntyre ◽  
Karl Van Dalen
Keyword(s):  
Steel Beams ◽  
End Plate ◽  
Plate Connections

scholarly journals Verification of prying effect in prestressed end-plate connection

2013 ◽  
Vol 12 (2) ◽  
pp. 251-258
Author(s):  
Krzysztof Ostrowski ◽  
Jan Łaguna ◽  
Aleksander Kozłowski
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
High Strength ◽  
Experimental Tests ◽  
Analytical Models ◽  
End Plate ◽  
Plate Connections ◽  
Plate Connection ◽  
Element Method

End-plate connections are very often used is steelwork, as tension and bending connections. As a result of deflection of end plate, additional forces, known as prying forces arise and consequently increase stresses in bolts. Eurocode 1993-1-8 do not distinguish end-plate connections prestressed by high strength bolts from non-prestressed. The aim of the paper is to perform the comparison of previous analytical models and code regulations for coefficient of prying forces to the experimental tests and modelling by finite element method. Results of the analysis show that the behaviour of prestressed connection is essentially different with comparison to non-prestressed.

scholarly journals Numerical testing of steel beam-to-column bolted extended end-plate connection with haunches

2019 ◽  
Vol 29 ◽  
pp. 02008
Author(s):  
Dominiq Jakab ◽  
Aurel Stratan ◽  
Dan Dubina
Keyword(s):  
Material Model ◽  
Tensile Tests ◽  
End Plate ◽  
Numerical Testing ◽  
Experimental Campaign ◽  
Moment Resisting ◽  
Extended End Plate ◽  
Plate Connections ◽  
Plate Connection ◽  
Steel Joints

During the European research project entitled EQUALJOINTS (European pre-Qualified steel JOINTS) [1], which recently concluded, the matter of providing a set of pre-qualification procedures for moment resisting beam-to-column connections which are currently used in Europe has been addressed. During the experimental campaign 24 specimens with bolted extended end-plate connections with haunches were tested. The current paper presents the numerical model which has been developed such that numerical testing may be performed to further investigate specific details. In what concerns the material, an isotropic material model has been calibrated and used based on tensile tests of coupons extracted from the specimens to model the actual plastic behaviour. Moreover, the imperfections of the beam have been taken into account using a bucking analysis to model as accurate as possible the specimens tested. The interaction between parts has been modelled using contacts with different interaction laws. The model used for the bolt has been calibrated such that the preloading and failure replicate the behaviour of the actual bolts used in the experiments.

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