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A platform for research: civil engineering, architecture and urbanism
An elastoplastic bracing system for structural vibration control
Highlights A new device is designed and presented for passive control of structural vibration. The device is deeply characterized mechanically using FE simulations. The device is modeled mathematically using Bouc-Wen hysteresis model. Different designs of the device were investigated through case studies. The device mitigates remarkably the undesirable effects of dynamic excitation.
Abstract This paper presents and investigates a new elastoplastic bracing system for passive vibration control of structures. It consists of a deformable elastoplastic metallic core comprising four Arcs around a central Ring and, therefore, the Bracing system is called the “AR-Brace”. Each arc is firmly attached tangentially to the central ring, then to the adjacent arc and finally to a corner of a structural panel, even directly or through a rigid arm. Different design variations of the AR-Brace could be obtained, by means of controlling the construction material and dimensions/thickness of its core, to passively adapt/tune the provided working ranges of stiffness/damping to specific requirements. In this work, some AR-Brace designs were studied to evaluate their efficiency. The device was thoroughly characterized mechanically using finite elements simulations and then modeled mathematically using the Bouc-Wen hysteresis model. The ability of the AR-Brace to control structural vibration and other vibration-dependent responses was investigated via numerical case studies under real and synthetic dynamics excitations. It was found that the displacement-based AR-Brace achieves a good balance between the added lateral rigidity and the provided damping, which was reflected in a remarkable mitigation of the undesirable effects of dynamic excitations, even at moderate levels of supplementary damping by the device.
An elastoplastic bracing system for structural vibration control
Highlights A new device is designed and presented for passive control of structural vibration. The device is deeply characterized mechanically using FE simulations. The device is modeled mathematically using Bouc-Wen hysteresis model. Different designs of the device were investigated through case studies. The device mitigates remarkably the undesirable effects of dynamic excitation.
Abstract This paper presents and investigates a new elastoplastic bracing system for passive vibration control of structures. It consists of a deformable elastoplastic metallic core comprising four Arcs around a central Ring and, therefore, the Bracing system is called the “AR-Brace”. Each arc is firmly attached tangentially to the central ring, then to the adjacent arc and finally to a corner of a structural panel, even directly or through a rigid arm. Different design variations of the AR-Brace could be obtained, by means of controlling the construction material and dimensions/thickness of its core, to passively adapt/tune the provided working ranges of stiffness/damping to specific requirements. In this work, some AR-Brace designs were studied to evaluate their efficiency. The device was thoroughly characterized mechanically using finite elements simulations and then modeled mathematically using the Bouc-Wen hysteresis model. The ability of the AR-Brace to control structural vibration and other vibration-dependent responses was investigated via numerical case studies under real and synthetic dynamics excitations. It was found that the displacement-based AR-Brace achieves a good balance between the added lateral rigidity and the provided damping, which was reflected in a remarkable mitigation of the undesirable effects of dynamic excitations, even at moderate levels of supplementary damping by the device.
An elastoplastic bracing system for structural vibration control
Ismail, Mohammed (author)
Engineering Structures ; 200
2019-09-10
Article (Journal)
Electronic Resource
English