Block Shear Strength of Single Shear Four-Bolted Connections with Aluminum Alloys – Experiment and Design Strength Comparison

2012 ◽  
Vol 217-219 ◽  
pp. 386-389 ◽  
Author(s):  
Tae Soo Kim
Keyword(s):  
Shear Strength ◽  
Shear Fracture ◽  
Plane Deformation ◽  
Plate Thickness ◽  
Bolted Connections ◽  
Direction Parallel ◽  
Alloy Plate ◽  
Block Shear ◽  
End Distance ◽  
Single Shear

Experiments have been carried out to investigate the ultimate behaviors of single shear bolted connections assembled with four bolts (2 rows×2 columns bolt arrangement) under shear and aluminum alloy plate. End distance parallel to the direction of applied load is considered as main variables. All specimens failed in block shear fracture and curling (out of plane deformation) in the direction parallel to plate thickness was also observed for some bolted connections with a long end distance. The curling led to sudden ultimate strength reduction and test strength was compared with the block shear strength predicted by current design specifications.

Finite Element Analysis on Structural Behaviours of Single Shear Cold-Formed Stainless Steel Bolted Connections with Two Bolts

2010 ◽  
Vol 452-453 ◽  
pp. 613-616 ◽  
Author(s):  
Yong Taeg Lee ◽  
Tae Soo Kim ◽  
Jin Seong Lim ◽  
Seung Hun Kim
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stainless Steel ◽  
Ultimate Strength ◽  
Plane Deformation ◽  
Plate Thickness ◽  
Bolted Connections ◽  
Element Analysis ◽  
End Distance ◽  
Single Shear

The experimental research for single shear bolted connection of cold-formed stainless steel fabricated with two bolts (2×1 bolt arrangement) has been conducted by T.S. Kim etc. Plate thickness and end distance parallel to the direction of loading was considered as main variables. It is found that the curling occurred easily in bolted connections with a long end distance and thinner plate. In this paper, finite element analysis study has been performed in order to compare test results with the predicted results and to investigate in detail the ultimate strength and curling influence. Finite element analysis(FEA) procedures also were introduced. FE models of connections with restrained out of plane deformation were also simulated for comparison with the curled models. Therefore, the validation of FEA in predicting ultimate strength and curling behavior was verified and the strength reduction ratio caused by curling was estimated.

An Experimental Study on Structural Behaviours of Single Shear Cold-Formed Stainless Steel Bolted Connections with Two Bolts

2010 ◽  
Vol 452-453 ◽  
pp. 617-620 ◽  
Author(s):  
Tae Soo Kim ◽  
Min Seung Kim ◽  
Sung Woo Shin
Keyword(s):  
Stainless Steel ◽  
Ultimate Strength ◽  
Life Cycle Cost ◽  
Plane Deformation ◽  
Plate Thickness ◽  
Bolted Connections ◽  
Out Of Plane ◽  
End Distance ◽  
Bolt Arrangement ◽  
Single Shear

The application of stainless steel in buildings has been increased gradually with excellent life cycle cost for ensuring the sustainability in structures for the reduction of green house gas emission. Especially, the purpose of this paper is to investigate the structural behaviors such as ultimate strength, fracture mode and out of plane deformation, i.e., curling of single shear bolted connection of cold-formed austenitic stainless steel with two bolts (2×1 bolt arrangement). Plate thickness and end distance parallel to the direction of applied force are considered as main variables. The curling was also observed in the bolted connections with a long end distance and edge distance as the previous researches. Curling occurrence resulted in the change of fracture modes in connections with same bolt arrangement and end distance and ultimate strength reduction.

Development on ultimate strength equation of ferritic stainless steel (STS430) two-bolted connection

2019 ◽  
Vol 23 (6) ◽  
pp. 1209-1223 ◽  
Author(s):  
TaeSoo Kim ◽  
BoKyung Hwang ◽  
YoungChul Lim
Keyword(s):  
Stainless Steel ◽  
Ultimate Strength ◽  
Ferritic Stainless Steel ◽  
Shear Fracture ◽  
Plane Deformation ◽  
Tensile Fracture ◽  
Bolted Connections ◽  
Bolted Connection ◽  
Block Shear ◽  
Factor C

This article presents the experimental and numerical results of cold-formed ferritic stainless steel (STS430) bolted connection with two bolts. Single-shear bolted connections with varying end distance were planned and tested. Block shear fracture and curling (out-of-plane deformation) were observed in specimens. Finite element analysis was performed to investigate the conditions for curling occurrence and the curling effect on the ultimate strength of ferritic stainless steel bolted connections with extended end distances and edge distances varying from 24 to 60 mm. Curling occurred for bolted connections with end distances exceeding 39 mm and edge distances exceeding 30 mm. Ultimate strength of curled specimens was reduced up to 33% compared to the ultimate strength of uncurled connection. Since current design equations do not consider the curling effect and the difference in material properties, they did not provide accurate ultimate strength predictions of specimens with typical block shear fracture and curling occurrence. Therefore, a modified block shear equation was suggested for ferritic stainless steel bolted connection with typical block shear fracture mode, considering the actual fracture path and shear stress factor. A revised equation was also proposed for specimens with strength reduction by curling influence, considering the concepts of bearing action against connected plate by bolt (bearing factor, C = 1.6) and net-section tensile fracture between two bolts perpendicular to the direction of the applied force. Moreover, additional experiments for six specimens were performed and the reliability of the two suggested equations in this study was verified.

Block Shear Behaviours of Stainless Steel Channel Bolted Joints with Four Bolts

2011 ◽  
Vol 255-260 ◽  
pp. 74-78 ◽  
Author(s):  
Tae Soo Kim ◽  
Min Seong Kim ◽  
S.H. Kim ◽  
Y.T. Lee ◽  
S.W. Shin
Keyword(s):  
Stainless Steel ◽  
Ultimate Strength ◽  
Shear Fracture ◽  
Plane Deformation ◽  
Bolted Connection ◽  
Block Shear ◽  
Plane Plate ◽  
Out Of Plane ◽  
End Distance ◽  
Bolt Arrangement

The introduction of thin-walled stainless steel in buildings has been increased gradually for ensuring the sustainability thanks to excellent corrosion resistance and durability. Many studies on structural behaviors of stainless steel bolted connection fabricated with plane plate have been carried out. This paper is aimed at investigating the ultimate behaviors such as ultimate strength, fracture mode and out of plane deformation(i.e. curling) of channel bolted connection of cold-formed austenitic stainless steel with four bolts (2×2 bolt arrangement). End distance parallel to the direction of applied force is adopted as main variables. Specimens are planned with block shear fracture in ultimate state. In case of bolted connections with a long end distance, curling has also been observed. Ultimate strengths by test results are compared with those of current ASCE design specification and the influence of curling on ultimate strength is discussed.

Ultimate Behavior of Single Shear Bolted Connections with Thin-Walled Aluminum Alloys(6061-T6)

2012 ◽  
Vol 446-449 ◽  
pp. 3441-3445 ◽  
Author(s):  
Tae Soo Kim ◽  
Yong Hyun Jo ◽  
Seung Hun Kim ◽  
Yong Taeg Lee
Keyword(s):  
Finite Element ◽  
Ultimate Strength ◽  
Plane Deformation ◽  
Free Edge ◽  
Fe Analysis ◽  
Test Results ◽  
Bolted Connections ◽  
Element Analysis ◽  
Out Of Plane ◽  
Single Shear

The purpose of this study is to investigate the ultimate behaviors of aluminum alloy bolted connections assembled with four bolts. Specimens for single shear bolted connections were tested and finite element analysis based on this test results was conducted. The validity of finite element(FE) analysis for predicting the structural behaviors such as ultimate strength, fracture mode and curling(out-of-plane deformation) occurrence was verified through the comparisons between test results and FE analysis results. It is known that the curling resulted in sudden strength drop. Moreover, FE models with free edge and restrained out-of-plane deformation for curled specimens are analyzed additionally, therefore, the influence of curling on the ultimate strength; strength reduction ratio is estimated.

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

2019 ◽  
Vol 157 ◽  
pp. 151-160 ◽  
Author(s):  
Bac V. Mai ◽  
Cao Hung Pham ◽  
Gregory J. Hancock ◽  
Giang D. Nguyen
Keyword(s):  
Shear Strength ◽  
Bolted Connections ◽  
Block Shear

Structural Behaviours and Curling Influence of Single Shear Cold-Formed Ferritic Stainless Steel Bolted Connections Fastened with Two Bolts

2013 ◽  
Vol 680 ◽  
pp. 252-256 ◽  
Author(s):  
Tae Soo Kim ◽  
Geun Beom Chae
Keyword(s):  
Stainless Steel ◽  
Ultimate Strength ◽  
Ferritic Stainless Steel ◽  
Plane Deformation ◽  
Experimental Studies ◽  
Strength Reduction ◽  
Bolted Connection ◽  
Out Of Plane ◽  
End Distance ◽  
Single Shear

Experimental studies for single shear bolted connection of cold-formed ferritic stainless steel fastened with two bolts (2×1 bolt array) and 3.0 mm thick plate has been performed by T.S. Kim etc. End distances parallel to the direction of applied force were considered as the main variables of specimens. Curling (out of plane deformation) was observed in bolted connection with 60mm end distance and it caused abrupt strength reduction. The purpose of this paper is to compare the analysis results with test results and investigate the curling influence on ultimate strength through numerical modelling. FE models with restrained curling were also simulated for strength comparison with the curled specimen. Therefore, the validation of finite element(FE) analysis in predicting ultimate strength and curling behaviour was verified and the strength reduction ratio by the curling was estimated.

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