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A platform for research: civil engineering, architecture and urbanism
Experimental study on seismic performance of prefabricated viscoelastic damping bolted joints
https://orcid.org/0000-0002-9710-760X
https://orcid.org/0000-0001-9989-577X
https://orcid.org/0000-0002-1667-2448
https://orcid.org/0000-0002-3605-8189
Highlights Viscoelastic (VE) dampers that dissipate energy through compression are adopted to improve the seismic performance of prefabricated beam-column joints with bolted connection. VE dampers are placed at the precast concrete beam-column joint by a built-in method, so as to avoid affecting the building functions. Under the premise of better ductility, the maximum bearing capacity of the proposed joint in the positive and negative load directions is 33.5% and 22.9% higher than that of the cast-in-situ joint, respectively. The feasibility and superiority of this design are proved. The initial rotational stiffness of the proposed joint is calculated by using the knowledge of steel structure, and theoretical value is in good agreement with the experimental value. It proves the validity of the mathematic model of initial rotational stiffness.
Abstract Aiming at the defect of insufficient bearing capacity of prefabricated concrete beam-column joint with bolted connection, a prefabricated viscoelastic damping bolted joint (VDBJ) is proposed with good seismic performance. The damping principle is based on that viscoelastic (VE) dampers can provide energy dissipation and additional stiffness for the structures. Three full-scale beam-column joint specimens were designed, including one cast-in-place joint specimen, one prefabricated bolted joint specimen without VE dampers and one prefabricated bolted joint specimen with VE dampers. Since the viscoelastic damper is a passive energy dissipation device with velocity correlation, comparison and analysis of three specimens under high-frequency cyclic loading are performed on the failure modes and seismic performance indexes such as hysteretic energy dissipation, displacement ductility, stiffness degradation and ultimate bearing capacity. The analysis of the test results indicate that the proposed prefabricated viscoelastic damping bolted joint has stronger ultimate bearing capacity and displacement ductility than the cast-in-place joint. The arrangement of VE dampers effectively controls the appearance and expansion of concrete cracks, which not only achieves the expected effect of shock absorption and energy dissipation, but also can realizes the rapid replacement of components after the earthquakes.
Experimental study on seismic performance of prefabricated viscoelastic damping bolted joints
https://orcid.org/0000-0002-9710-760X
https://orcid.org/0000-0001-9989-577X
https://orcid.org/0000-0002-1667-2448
https://orcid.org/0000-0002-3605-8189
Highlights Viscoelastic (VE) dampers that dissipate energy through compression are adopted to improve the seismic performance of prefabricated beam-column joints with bolted connection. VE dampers are placed at the precast concrete beam-column joint by a built-in method, so as to avoid affecting the building functions. Under the premise of better ductility, the maximum bearing capacity of the proposed joint in the positive and negative load directions is 33.5% and 22.9% higher than that of the cast-in-situ joint, respectively. The feasibility and superiority of this design are proved. The initial rotational stiffness of the proposed joint is calculated by using the knowledge of steel structure, and theoretical value is in good agreement with the experimental value. It proves the validity of the mathematic model of initial rotational stiffness.
Abstract Aiming at the defect of insufficient bearing capacity of prefabricated concrete beam-column joint with bolted connection, a prefabricated viscoelastic damping bolted joint (VDBJ) is proposed with good seismic performance. The damping principle is based on that viscoelastic (VE) dampers can provide energy dissipation and additional stiffness for the structures. Three full-scale beam-column joint specimens were designed, including one cast-in-place joint specimen, one prefabricated bolted joint specimen without VE dampers and one prefabricated bolted joint specimen with VE dampers. Since the viscoelastic damper is a passive energy dissipation device with velocity correlation, comparison and analysis of three specimens under high-frequency cyclic loading are performed on the failure modes and seismic performance indexes such as hysteretic energy dissipation, displacement ductility, stiffness degradation and ultimate bearing capacity. The analysis of the test results indicate that the proposed prefabricated viscoelastic damping bolted joint has stronger ultimate bearing capacity and displacement ductility than the cast-in-place joint. The arrangement of VE dampers effectively controls the appearance and expansion of concrete cracks, which not only achieves the expected effect of shock absorption and energy dissipation, but also can realizes the rapid replacement of components after the earthquakes.
Experimental study on seismic performance of prefabricated viscoelastic damping bolted joints
https://orcid.org/0000-0002-9710-760X
https://orcid.org/0000-0001-9989-577X
https://orcid.org/0000-0002-1667-2448
https://orcid.org/0000-0002-3605-8189
Highlights Viscoelastic (VE) dampers that dissipate energy through compression are adopted to improve the seismic performance of prefabricated beam-column joints with bolted connection. VE dampers are placed at the precast concrete beam-column joint by a built-in method, so as to avoid affecting the building functions. Under the premise of better ductility, the maximum bearing capacity of the proposed joint in the positive and negative load directions is 33.5% and 22.9% higher than that of the cast-in-situ joint, respectively. The feasibility and superiority of this design are proved. The initial rotational stiffness of the proposed joint is calculated by using the knowledge of steel structure, and theoretical value is in good agreement with the experimental value. It proves the validity of the mathematic model of initial rotational stiffness.
Abstract Aiming at the defect of insufficient bearing capacity of prefabricated concrete beam-column joint with bolted connection, a prefabricated viscoelastic damping bolted joint (VDBJ) is proposed with good seismic performance. The damping principle is based on that viscoelastic (VE) dampers can provide energy dissipation and additional stiffness for the structures. Three full-scale beam-column joint specimens were designed, including one cast-in-place joint specimen, one prefabricated bolted joint specimen without VE dampers and one prefabricated bolted joint specimen with VE dampers. Since the viscoelastic damper is a passive energy dissipation device with velocity correlation, comparison and analysis of three specimens under high-frequency cyclic loading are performed on the failure modes and seismic performance indexes such as hysteretic energy dissipation, displacement ductility, stiffness degradation and ultimate bearing capacity. The analysis of the test results indicate that the proposed prefabricated viscoelastic damping bolted joint has stronger ultimate bearing capacity and displacement ductility than the cast-in-place joint. The arrangement of VE dampers effectively controls the appearance and expansion of concrete cracks, which not only achieves the expected effect of shock absorption and energy dissipation, but also can realizes the rapid replacement of components after the earthquakes.
Experimental study on seismic performance of prefabricated viscoelastic damping bolted joints
He, Zefeng (author) / Huang, Xinghuai (author) / Xu, Zhao-Dong (author) / Shi, Qingxuan (author) / Guo, Yingqing (author) / Kim, Jinkoo (author)
Engineering Structures ; 256
2022-01-20
Article (Journal)
Electronic Resource
English