Cyclic behaviour of elliptical-shaped reduced web section connection

Davarpanah, Mohammad Ali; Ronagh, Hamid Reza; Memarzadeh, Parham; Behnamfar, Farhad

doi:10.1016/j.istruc.2020.02.016

Cited by 17 publications

(8 citation statements)

References 27 publications

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“…A bilinear stressstrain profile was assumed with young's modulus of 210 GPa, tangent modulus of 2.1 GPa and Poisson's ratio of 0.3. Based on former numerical investigations done by many scholars [27], [28], and according to guide runs, mesh element size of 20 mm was chosen to model the tested beam. This element size wasn't too large to cause major changes in the obtained results and at the same time it wasn't too small to make the solution run last for too much time.…”

Section: Simulation Of Steel Beams With Web Opening Subjectedmentioning

confidence: 99%

Effect of web opening location on fatigue assessment of H section steel beams

Elboghdady

Dabaon

Yossef

et al. 2022

Journal of Engineering Research

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In the last decades, steel beams with web opening were used extensively as useful structural and architectural elements due to their many advantages. In this research, steel beams with web opening subjected to static loading were modelled using the multi-purpose finite element software ANSYS and the finite element results were compared with previous research. Then, steel beams with a single web opening subjected to fatigue loading were investigated numerically. The effect of changing the location of web opening on the fatigue assessment of H section steel beams with web opening was studied taking normal stress into account. It was clear that, normal stress fatigue life of the steel beams was affected significantly by changing web opening location along the beam span when compared to a beam with solid web while the beam span, opening size and steel section were kept constant. The most convenient location of web opening along the beam span was found to be at mid span.

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Section: Simulation Of Steel Beams With Web Opening Subjectedmentioning

confidence: 99%

Effect of web opening location on fatigue assessment of H section steel beams

Elboghdady

Dabaon

Yossef

et al. 2022

Journal of Engineering Research

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“…In addition to local instability, another drawback of the large openings is the early failure of the beam section due to the significant effect of the shear-flexure interaction in the T sections remaining at the top and bottom of the large opening. Therefore, in order to reduce the depth of the web perforation, Davarpanah et al [10,11] introduced and studied the horizontal elliptical-shaped RWS connections. They suggested ranges for the purpose of choosing the geometric variables of the elliptical-cut and the reduced region to ensure that the formation of the plastic hinge is away from the column edge.…”

Section: Introductionmentioning

confidence: 99%

Design Approach To Bolted End-Plate Vertical-Slits RWS Connection

Nazaralizadeh

Ronagh

Memarzadeh

et al. 2021

Preprint

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Extensive research has been carried out on steel moment frames to improve the cyclic performance of seismic resisting connections with reduced beam section (RBS). The RBS connections are conventionally known by the radial reduction of the beam flange. Where the contribution of the beam flange to the flexural resistance is greater than that of the beam web, some researchers have proposed reduced web section (RWS) connections, instead. The present study dedicates to the RWS connections with vertical-slits (VS), as a cost-effective alternative with multiple design parameters. This paper aims to obtain proper ranges for the geometric design parameters of the VS-RWS connection. In this order, two full-scale specimens of the bolted end-plate VS-RWS connection were experimentally tested under the SAC cyclic loading to evaluate the performance of connections, and then a parametric study was carried out using the verified numerical models. The parameters consist of the distance between the column face and the beginning of the reduced region, the length of the reduced region, as well as the depth and width of the vertical-slits. Based on the results, certain recommendations for the ranges of the geometric parameters of VS-RWS have been suggested. In order to obtain the story drift of the frame caused by the VS-RWS beam flexural deformation using the conjugate beam method, the original VS-RWS was replaced with an equivalent constant-cut reduced beam section (CC-RBS). At last, a simple design procedure for VS-RWS connections was provided according to AISC-358.

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“…The typical representatives of the beam end weakening connection include the dog-bone connection and the web opening connection [7][8][9][10]. However, the beam weaken connection still has the deficiencies as follows.…”

Section: Introductionmentioning

confidence: 99%

Damping Performance Experiment and Damage Analysis of Replacement Connection With Low-Yield-Point Steel

2021

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The performance design for traditional steel rigid connection cannot fulfill the desired seismic requirements. Though beamcolumn connection with weaken beam end can approximately realize the concept about "strong column -weak beam", the local buckling and the distortion buckling in the weaken zone and the total lateral damage maybe occur in rare earthquake and the capacity is not enough. The replacement connection with low-yield-point steel (LYPS) is proposed base on the idea of resilient structure, and its weakened parts in the flange slab and web plate are filled with LYPS. During earthquake, the LYPS primarily yields and fully dissipates energy. The damage of the main parts in the connection is minor and the LYPS can be replaced after the earthquake. According to the insufficiency of the traditional damage models, the damage model based on differential ratio of elastic plastic dissipated energy is proposed. Low cycle loading experimental research is carried out on three kinds of beam-column connections, which involve the classic connection, the beam end weaken connection and the replacement connection. Comprehensive assessments of damping performanc e are proposed through a variety of performance evaluation parameters. It is approved that the replacement connection has much more excellent bearing capacity, ductility and energy consumption ability. In addition, the proposed energy damage index can repr esent damage evolution process and damage law.

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Cyclic behaviour of elliptical-shaped reduced web section connection

Cited by 17 publications

References 27 publications

Effect of web opening location on fatigue assessment of H section steel beams

Effect of web opening location on fatigue assessment of H section steel beams

Design Approach To Bolted End-Plate Vertical-Slits RWS Connection

Damping Performance Experiment and Damage Analysis of Replacement Connection With Low-Yield-Point Steel

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