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A platform for research: civil engineering, architecture and urbanism
Research on seismic performance of existing frame structures reinforced with externally assembled energy consuming frame substructures
At present, a large number of aging frame structures in China are no longer capable of meeting the current seismic design requirements, and urgent seismic retrofitting is necessary. This study introduces an innovative retrofitting approach for enhancing the seismic resilience of existing frame structures by employing external energy-dissipating frame substructures. The method involves the strategic placement of I-shaped steel dampers or energy-dissipating hinge dampers at the joints of the external frames to augment the energy dissipation capabilities of structures. Utilizing a combination of experimental data from existing frame structures and damper tests, five finite element models were constructed to assess the seismic performance of various retrofit configurations, including pure prefabricated frame substructures, those reinforced with I-shaped steel dampers, and those with energy-dissipating hinge dampers. The findings demonstrate that the incorporation of energy-dissipating frames can lead to a significant increase in structural load-bearing capacity, ranging from 33% to 77%. Notably, the models featuring I-shaped steel dampers at the base and top of the external frames achieved the highest peak load-bearing capacity, while those with energy-dissipating hinge dampers at these locations exhibited the most pronounced hysteresis behavior, indicative of superior energy dissipation properties. Strain analysis of the models revealed that the majority of structural damage was localized to the dampers, effectively facilitating the control of damage during seismic events.
Research on seismic performance of existing frame structures reinforced with externally assembled energy consuming frame substructures
At present, a large number of aging frame structures in China are no longer capable of meeting the current seismic design requirements, and urgent seismic retrofitting is necessary. This study introduces an innovative retrofitting approach for enhancing the seismic resilience of existing frame structures by employing external energy-dissipating frame substructures. The method involves the strategic placement of I-shaped steel dampers or energy-dissipating hinge dampers at the joints of the external frames to augment the energy dissipation capabilities of structures. Utilizing a combination of experimental data from existing frame structures and damper tests, five finite element models were constructed to assess the seismic performance of various retrofit configurations, including pure prefabricated frame substructures, those reinforced with I-shaped steel dampers, and those with energy-dissipating hinge dampers. The findings demonstrate that the incorporation of energy-dissipating frames can lead to a significant increase in structural load-bearing capacity, ranging from 33% to 77%. Notably, the models featuring I-shaped steel dampers at the base and top of the external frames achieved the highest peak load-bearing capacity, while those with energy-dissipating hinge dampers at these locations exhibited the most pronounced hysteresis behavior, indicative of superior energy dissipation properties. Strain analysis of the models revealed that the majority of structural damage was localized to the dampers, effectively facilitating the control of damage during seismic events.
Research on seismic performance of existing frame structures reinforced with externally assembled energy consuming frame substructures
Atlantis Highlights in Engineering
Gao, Qingfei (editor) / Jiang, Liqiang (editor) / Chen, Yu (editor) / Xu, Xiufeng (author) / Kong, Zi’ang (author)
International Conference on Structural Engineering and Industrial Architecture ; 2024 ; Zhuhai, China
2024-06-07
10 pages
Article/Chapter (Book)
Electronic Resource
English
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