Rotation Capacity of I-Shaped Beams with Concrete Slab in Buckling-Restrained Braced Frames

Suzuki, Atsushi; Kimura, Yoshihiro; Matsuda, Yoriyuki; Kasai, Kazuhiko

doi:10.1061/jsendh.steng-12550

Cited by 4 publications

(1 citation statement)

References 39 publications

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“…On the other hand, although experimental and analytical data on I-beams subjected to monotonic loading and cyclic loading have been collected in previous studies [68][69][70][71][72][73][74][75][76][77], the influence of the loading history on the rotation capacity, energy dissipation capacity, hysteretic energy dissipation, and Bausinger effect coefficient has not been clarified yet.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Rotation Capacity and Bauschinger Effect Coefficient of I-Shaped Beams Considering Loading Protocol Influences

Kimura

2024

Buildings

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Recent catastrophic earthquake events have reinforced the necessity of evaluating the seismic performance of buildings. Notably, the buildings can go into the plastic phase during a striking earthquake disaster. Under this condition, the current design codes assume seismic response reduction by virtue of the energy dissipation capacity of the structural members. In the strong-column–weak-beam design, which involves I-shaped beams and boxed columns, the mechanism is defined as a standard design scheme to prevent the building from collapsing. Therefore, energy dissipation relies highly on the I-shaped beam performance. However, the I-shaped beam performance can differ depending on the loading history experienced, whereas this effect is untouched in the prevailing evaluation equation. Hence, this study first performs cyclic loading tests of 11 specimens using different loading protocols. The experimental results clarify the fluctuation in the structural performance of I-shaped beams depending on the applied loading hysteresis, proving the necessity of considering the stress history for proper assessment. Furthermore, the database of experimental results is constructed based on the previous experimental studies. Ultimately, the novel evaluation equation is proposed to reflect the influences of the loading protocol. This equation is demonstrated to effectively assess the member performance retrieved from the experiment of 65 specimens, comprising 11 specimens from this investigation and 54 specimens from the database. The width–thickness ratio, shear span-to-depth ratio, and loading protocols are utilized as the evaluation parameters. Moreover, the prediction equation of the Bauschinger effect coefficient is newly established to convert the energy dissipation capacity under monotonically applied force into hysteretic energy dissipation under the cyclic forces.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Rotation Capacity and Bauschinger Effect Coefficient of I-Shaped Beams Considering Loading Protocol Influences

Kimura

2024

Buildings

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Rotation capacity of I-beams under cyclic loading with different kinematic/isotropic hardening characteristics

Suzuki,

Kimura

2024

Journal of Constructional Steel Research

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Seismic performance of the replaceable steel links with different short length ratios

Xiong,

Guo,

Cai

et al. 2024

Sci Rep

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Compared with the traditional frame structures, the novel composite frame with replaceable steel links can realize the rapid recovery of building occupancy after seismic actions to provide the capacity of reducing structural damage and ensure the reuse of a structure. In this system, plastic deformation and damage mainly concentrated in the steel links serving as the structural fuses and other structural members still remained elastic or minor plastic, and then the damaged steel links can be easy for replace. In order to study the seismic performance of the replaceable steel links, a total of four test specimens with different short length ratios were designed. A low-cycle reversed loading test was carried out in terms of failure characteristic, hysteretic response and shear strength. The results indicated that all tested specimens presented a stable and full hysteretic response while the steel links especially exhibited a large inelastic deformation capacity and fully developed shear strength as the structural fuses. Besides, failure modes of steel links included two types of shear failure and bending-shear failure, followed by two types of damage features, including web-to-stiffener weld tear, web buckling, flange-to-end plate weld tear and flange buckling, respectively. Finally, nonlinear finite element models (FEMs) of test specimens were implemented by the Abaqus software. The numerical results were in good agreement with the experimental results in terms of load-deformation curves, initial stiffness, the development of Von Mises stress and cumulative plastic equivalent strain (PEEQ) indexes to facilitate design practice.

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Rotation Capacity of I-Shaped Beams with Concrete Slab in Buckling-Restrained Braced Frames

Cited by 4 publications

References 39 publications

Evaluation of Rotation Capacity and Bauschinger Effect Coefficient of I-Shaped Beams Considering Loading Protocol Influences

Evaluation of Rotation Capacity and Bauschinger Effect Coefficient of I-Shaped Beams Considering Loading Protocol Influences

Rotation capacity of I-beams under cyclic loading with different kinematic/isotropic hardening characteristics

Seismic performance of the replaceable steel links with different short length ratios

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