Material ductility and temperature effects on block shear capacity of bolted connections

This paper presents the finite-element (FE) block shear failure (BSF) deformation-to-fracture analysis. FE analysis reveals the following: BSF begins with bolt – bolt hole contact point compressive yielding and not the tensile or shear yielding reported in the literature. BSF does not result from the combination of the gauge tensile plane tensile deformation and the shear plane pure shear deformation alone as reported in the literature and codes. BSF results from compressive deformation of the bolt – bolt hole contact points, tensile deformation of bolt hole portions not in contact with the bolts, gauge tensile plane and edge distance tensile plane deformations in combination with pure shear deformation and a combined shear and tensile bending deformation of the portions of the shear planes near to and remote from the bolt – bolt hole contact points, respectively. This study provides a better understanding of the BSF mechanism, BSF total load-bearing areas, and various resistances to deformation that contribute to the block shear capacity.

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Block shear strength and behaviour of cold-reduced G450 steel bolted connections using DIC

Journal of Constructional Steel Research ◽

10.1016/j.jcsr.2018.11.025 ◽

2019 ◽

Vol 157 ◽

pp. 151-160 ◽

Cited By ~ 3

Author(s):

Bac V. Mai ◽

Cao Hung Pham ◽

Gregory J. Hancock ◽

Giang D. Nguyen

Keyword(s):

Shear Strength ◽

Bolted Connections ◽

Block Shear

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A Neural Network Modelling of Steel Joint Block Shear Capacity

Proceedings of the Ninth International Conference on the Application of Artificial Intelligence to Civil, Structural and Environmental Engineering ◽

10.4203/ccp.87.26 ◽

2009 ◽

Author(s):

F. Rodrigues ◽

L. Biondi Neto ◽

P.C.G. da S. Vellasco ◽

L.R.O. de Lima ◽

M.M.B.R. Vellasco

Keyword(s):

Neural Network ◽

Shear Capacity ◽

Network Modelling ◽

Steel Joint ◽

Neural Network Modelling ◽

Block Shear

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Experimental investigation of block shear failure in coped steel beams

Canadian Journal of Civil Engineering ◽

10.1139/l03-044 ◽

2003 ◽

Vol 30 (5) ◽

pp. 871-881 ◽

Cited By ~ 22

Author(s):

Cameron R Franchuk ◽

Robert G Driver ◽

Gilbert Y Grondin

Keyword(s):

Shear Failure ◽

Shear Capacity ◽

Steel Beams ◽

Steel Beam ◽

Capacity Design ◽

Design Standards ◽

Block Shear ◽

Flange Beams ◽

Flexural Beam ◽

Full Scale Tests

Relatively few tests have been conducted to determine the block shear capacity and behaviour of coped steel beam connections. Furthermore, design standards are inconsistent in the way they treat this failure mode and may predict capacities significantly higher than those determined experimentally. To address these issues, 17 full-scale tests were conducted on coped wide-flange beams. Parameters considered in the study include beam end rotation, end and edge distances, and bolt layout. Many of these parameters had not been systematically investigated prior to this research, and the effect of end rotation, i.e., the rotation at the connection due to flexural beam action, had not been examined. It is found that few of these parameters significantly affect the connection capacity, apart from the associated changes in net tension and gross shear areas. Following the laboratory tests, capacity design equations outlined in Canadian, American, European, and Japanese standards were examined. Tests-to-predicted ratios for each standard were calculated and compared. It was found that none of these standards accurately and consistently predict block shear capacity, especially when considering two-line connections.Key words: beams, block shear, bolts, connections, end rotation, rupture, shear, steel, tension, yield.

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