Analytical Study of Moment-Resisting Frames Retrofitted with Shear Slotted Bolted Connection

Nikoukalam, Mohammad T.; Mirghaderi, Seyed Rasoul; Dolatshahi, Kiarash M.

doi:10.1061/(asce)st.1943-541x.0001244

Cited by 22 publications

(19 citation statements)

References 22 publications

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“…Therefore, the method is based on an iterative optimization procedure, namely, the OP method (Haftka and Gürdal, ) which uses a simple equation that changes a dependent factor with respect to the difference between the actual value of a parameter compared with its desired value. This method is also used by several researchers in order to enhance the performance behavior of structures (Mohammadi et al ., ; Moghaddam and Hajirasouliha, ; Nikoukalam et al ., ). The OP is a simple and practical optimization algorithm.…”

Section: Analytical Assessmentmentioning

confidence: 97%

“…Nikoukalam et al . () also used the aforementioned optimization method in order to find the best pre‐tensioning forces for an innovative damping connection, namely, shear slotted bolted connection. Note that the OP method may have some serious drawbacks for multi objective or highly dependent optimization problems, but for single objective formulations with low level of dependency it works desirably.…”

Section: Analytical Assessmentmentioning

confidence: 99%

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Optimized design procedure for coupling panels in steel plate shear walls

Eshkevari

Dolatshahi

Mofid

2016

Structural Design Tall Build

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Summary Coupling beams have had a widespread application as performance enhancing devices within concrete structures and more recently also in steel structures. However, the conventional coupling beams are not so efficient in coupling distant walls. In this paper, a novel form of coupling members, namely, coupling panels is proposed and, then, the application for a nine‐story building is investigated. Coupling panels are steel plates which are exerted in the intermediate spans between adjacent shear walls and act as a mega‐coupling beam. First, a verified finite element model is constructed to demonstrate coupling panel behavior along with its global structural mechanism. Subsequently, a nine story building is designed and retrofitted as a new and existing building, using coupling panels. Moreover, an innovative optimization algorithm is proposed in order to achieve the best plate configuration to improve the structural performance using Nonlinear Static Analysis, Modal Pushover Analysis and Time History Analysis and the corresponding results are compared. In summary, it is shown that coupling panels can considerably control structural deformation demands toward a uniform pattern and reduce demands of main shear walls. The optimized design method also leads to a more economical design in comparison with force‐based design approaches. In addition, the proposed coupling panels are shown to be significantly effective, regarding to energy dissipation during earthquakes, and can enhance the structural resiliency. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Analytical Assessmentmentioning

confidence: 97%

Section: Analytical Assessmentmentioning

confidence: 99%

Optimized design procedure for coupling panels in steel plate shear walls

Eshkevari

Dolatshahi

Mofid

2016

Structural Design Tall Build

Self Cite

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“…The ductile performance of the SBC is remarkable, dissipating significant amount of seismic energy [23,24]. FitzGerald et al [15] concluded two states of the SBC performance, where the first state was the friction state with no strength hardening and the second state included the strength hardening at a larger deformation level.…”

Section: Introductionmentioning

confidence: 97%

Dimensional analysis of the slotted bolted connections against impulsive earthquake ground motions

Shu

2016

Journal of Constructional Steel Research

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“…In most passive control systems, such as a metallic plate damper or a buckling restrained brace, the input energy is dissipated by sacrificial elements that are replaceable after the earthquakes . These systems help improve the seismic performance of the structure by decreasing plastic deformation demands while strengthening the system …”

Section: Introductionmentioning

confidence: 99%

“…Extensive researches on SBCs were done at University of Auckland by Butterworth, Clifton, and their co‐workers, who developed the semi‐rigid sliding hinge joint and its friction damper, namely the asymmetric friction connection. In addition to the rotational SBCs, the shear SBCs, which are applied to the center of the beam, have been proposed recently to improve the shear force resistance for generalized lateral load‐resisting systems, where the shear SBCs act as a mechanical shear fuse demonstrating reliable seismic behaviors.…”

Section: Introductionmentioning

confidence: 99%

Comprehending the ductile behavior of slotted bolted connections

Shu

2016

Struct Design Tall Spec Build

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Structural steel special moment frames are designed to resist earthquakes with substantial inelastic energy dissipation. The ductile beam‐to‐column connections become more popular over these years by dissipating the earthquake input energy at beam ends. The paper provides a comprehensive study of a high‐strength slotted bolted connection (SBC). Slotted holes instead of round holes are used for the connection such that frictional sliding could be developed. Experimentally, a standard bolt–weld connection as well as three similar slotted bolted connections were designed and tested. The load‐carrying capacities, the ductile deformations, the energy dissipation capacities, and the hysteretic characteristics of the specimens were presented. The overall performance of the steel connections by replacing the circular holes with slotted holes is evaluated, and the design recommendations of the flange gusset plate with slotted holes are provided. Numerically, the nonlinear SBC behavior was simulated and calibrated against the experimental results. The SBC effectiveness as well as the parametrical influences have been presented in details. Results show that the friction slippage behaviors of the specimens with slotted holes provide better ductility, higher plastic deformation capacity, and increased load‐resisting capacities near the ultimate strength.

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Analytical Study of Moment-Resisting Frames Retrofitted with Shear Slotted Bolted Connection

Cited by 22 publications

References 22 publications

Optimized design procedure for coupling panels in steel plate shear walls

Optimized design procedure for coupling panels in steel plate shear walls

Dimensional analysis of the slotted bolted connections against impulsive earthquake ground motions

Comprehending the ductile behavior of slotted bolted connections

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