Experimental and Numerical Study of Compression Zone in Steel Connections

Sabra BOUGOFFA; Sébastien DURIF; Omar MEZGHANNI; Abdelhamid BOUCHAIR; Atef DAOUD

doi:10.1002/cepa.1370

Performance of Unstiffened Welded Steel I-Beam to Hollow Tubular Column Connections Under Seismic Loading

International Journal of Structural Stability and Dynamics ◽

10.1142/s0219455414500333 ◽

2015 ◽

Vol 15 (01) ◽

pp. 1450033 ◽

Cited By ~ 9

Author(s):

Qian-Yi Song ◽

Amin Heidarpour ◽

Xiao-Ling Zhao ◽

Lin-Hai Han

Keyword(s):

Cyclic Loading ◽

Failure Modes ◽

Numerical Study ◽

Combined Loading ◽

Building Structures ◽

Welded Steel ◽

Damage Level ◽

Tubular Columns ◽

Steel Connections ◽

Static And Cyclic Loading

Earthquake causes wide and severe damage to building structures, due to not just the great ground motion but also secondary actions, such as impact, blast or fire, occurring after earthquake. The extreme combined loading scenario should be considered for safety of buildings and lives. Taking fire for example, the combined load can be considered as an event in which the structures are first partially damaged under an earthquake and then attacked by fire. In order to investigate the post-earthquake loading scenario, it is important to assess the partial damage caused by earthquake on different components of structures. The behavior of welded steel I-beam to hollow square tubular columns is investigated herein. A detailed experimental study is presented in which two groups of unstiffened welded steel connections, with the same configurations, subjected to static and cyclic loading are considered. The flexibility and strength of the connections are measured, while the damage phenomena and failure modes are explored during the tests. The connection damage is found to be a cumulative fracture developing process which leads to significant gradual degradation of the mechanical properties of the connection. The quantificational evaluations of the cyclic loading induced damage are also carried out to investigate the connection damage level according to different loading intensities. A finite element modeling numerical study is also carried out to validate the experimental results and a good agreement is achieved. The test results and FE modeling provide a benchmark data for the unstiffened welded connections and can be used for further investigations of the connections subjected to combined actions such as post-earthquake fire.

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Numerical study of the behavior of intermeshed steel connections under mixed-mode loading

Journal of Constructional Steel Research ◽

10.1016/j.jcsr.2019.04.024 ◽

2019 ◽

Vol 160 ◽

pp. 89-100 ◽

Cited By ~ 2

Author(s):

Mohammad E. Shemshadian ◽

Jia-Liang Le ◽

Arturo E. Schultz ◽

Patrick McGetrick ◽

Salam Al-Sabah ◽

...

Keyword(s):

Mixed Mode ◽

Numerical Study ◽

Mixed Mode Loading ◽

Steel Connections

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Numerical Study on Ultimate Behaviour of Bolted End-Plate Steel Connections

Latin American Journal of Solids and Structures ◽

10.1590/1679-78251579 ◽

2016 ◽

Vol 13 (1) ◽

pp. 1-22 ◽

Cited By ~ 8

Author(s):

R.E.S. Ismail ◽

A.S. Fahmy ◽

A.M. Khalifa ◽

Y.M. Mohamed

Keyword(s):

Numerical Study ◽

Plate Steel ◽

Steel Connections ◽

End Plate

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Limit state behavior and response sensitivity analysis of endplate steel connections with shape memory alloy bolts

Journal of Intelligent Material Systems and Structures ◽

10.1177/1045389x20942584 ◽

2020 ◽

Vol 31 (18) ◽

pp. 2071-2087

Author(s):

Majid Mohammadi Nia ◽

Saber Moradi

Keyword(s):

Shape Memory Alloy ◽

Shape Memory ◽

Numerical Study ◽

Slenderness Ratio ◽

Limit State ◽

Local Buckling ◽

Limit States ◽

Response Sensitivity ◽

Cyclic Response ◽

Steel Connections

Shape memory alloys have been used in developing self-centering steel moment connections. This article presents a numerical study aiming at evaluating the cyclic response sensitivity and limit states of extended endplate steel connections with shape memory alloy bolts. Three-dimensional finite element models are developed and validated against a recent experimental study. Using a statistical design-of-experiment method, the effects of 21 design factors and their interactions on the cyclic response of shape memory alloy connections are assessed. The sensitivity of six response parameters is studied. In addition, four limit states for shape memory alloy connections are discussed, including beam local buckling, bolt excessive axial strain, endplate yielding, and column flange yielding. Results show that endplate thickness, shape memory alloy bolt diameter, beam web slenderness ratio, and shape memory alloy maximum transformation strain are the most influential factors. Furthermore, endplate yielding is found to be the governing limit state in almost 80% of the analyzed connections, whereas shape memory alloy bolt excessive strain and column flange yielding are observed in less than 20% and 5% of the connections, respectively. Beam local buckling is not governing in the analyzed shape memory alloy connections designed as per the AISC 358-16 and AISC 341-16 seismic design requirements for extended endplate connections and highly ductile members.

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Compression zone with partial stiffeners in beam-to-column steel connections

Engineering Structures ◽

10.1016/j.engstruct.2020.111674 ◽

2021 ◽

Vol 229 ◽

pp. 111674

Author(s):

Sabra Bougoffa ◽

Omar Mezghanni ◽

Sébastien Durif ◽

Abdelhamid Bouchaïr ◽

Atef Daoud

Keyword(s):

Compression Zone ◽

Steel Connections

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Seismic Behaviour of RBS and AW-RBS Moment Resistant Connections in Double I-Beams

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.553.612 ◽

2014 ◽

Vol 553 ◽

pp. 612-617

Author(s):

Saleh Mohammad Ebrahimzadeh Sepasgozar ◽

Morteza Naghipour ◽

Ali Akbarnezhad

Keyword(s):

Numerical Study ◽

Steel Structures ◽

Plastic Behavior ◽

Northridge Earthquake ◽

Resistant Steel ◽

Seismic Behaviour ◽

Reduced Beam Section ◽

Steel Connections ◽

Modeling Software ◽

Rbs Connections

Moment resistant steel connections are widely used in steel structures and play a significant role in reliability of structures, especially in earthquake-prone regions. After the Northridge earthquake, the invention of Reduced Beam Section (RBS) connections was a turning point in the design of the moment-resistant steel connections. In the present study, the seismic behavior of the RBS connections with reduced flange width as well as the AW-RBS connections with reduced web section in the double section beams are investigated. The results of a numerical study conducted using ABQUS finite element modeling software to investigate the ductility, energy absorption and plastic behavior of the RBS joints under cyclic loads are presented. Results showed promising performance with regards to energy absorbance and ductility for the AW-RBS connections.

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