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Seismic Behavior Assessment of Semi-rigid Frame Under Near-Field Earthquakes
The responses of semi-rigid (SR) frames under earthquakes are different from the rigid frames. Earlier research work was focused on far-field earthquakes, whereas the near-field (NF) earthquakes are crucial for civil engineering structures. In this paper, an extensive study is carried out to investigate the response behavior of semi-rigid frames for NF earthquakes with fling step and directivity effects. For this purpose, a ten-story steel frame is analyzed for four different earthquakes, two with near-field with directivity effect and one with the fling step effect and far-field earthquake. The PGV-to-PGA ratio is varied for NF earthquakes with directivity effects. A nonlinear time-history analysis is carried out for four earthquakes. The response quantities of interest include the maximum top-floor displacement, maximum inter-story drift ratio, total number of plastic hinges, SRSS of the maximum plastic hinge rotations, and energy dissipation in SR frames. The results of the numerical study indicate that the response behavior for the NF earthquakes with the fling step and directivity effects is distinctly different both in nature and magnitude. The PGV-to-PGA ratio has a significant effect on the response behavior of the frame produced by the NF earthquake with the directivity effect.
Seismic Behavior Assessment of Semi-rigid Frame Under Near-Field Earthquakes
The responses of semi-rigid (SR) frames under earthquakes are different from the rigid frames. Earlier research work was focused on far-field earthquakes, whereas the near-field (NF) earthquakes are crucial for civil engineering structures. In this paper, an extensive study is carried out to investigate the response behavior of semi-rigid frames for NF earthquakes with fling step and directivity effects. For this purpose, a ten-story steel frame is analyzed for four different earthquakes, two with near-field with directivity effect and one with the fling step effect and far-field earthquake. The PGV-to-PGA ratio is varied for NF earthquakes with directivity effects. A nonlinear time-history analysis is carried out for four earthquakes. The response quantities of interest include the maximum top-floor displacement, maximum inter-story drift ratio, total number of plastic hinges, SRSS of the maximum plastic hinge rotations, and energy dissipation in SR frames. The results of the numerical study indicate that the response behavior for the NF earthquakes with the fling step and directivity effects is distinctly different both in nature and magnitude. The PGV-to-PGA ratio has a significant effect on the response behavior of the frame produced by the NF earthquake with the directivity effect.
Seismic Behavior Assessment of Semi-rigid Frame Under Near-Field Earthquakes
Lecture Notes in Civil Engineering
Madhavan, Mahendrakumar (editor) / Davidson, James S. (editor) / Shanmugam, N. Elumalai (editor) / Sharma, Vijay (author) / Vern, Sourabh (author) / Shrimali, Mahendra K. (author) / Bharti, Shiv D. (author) / Datta, Tushar K. (author)
Indian Structural Steel Conference ; 2020 ; Hyderabad, India
Proceedings of the Indian Structural Steel Conference 2020 (Vol. 1) ; Chapter: 49 ; 613-624
2023-08-17
12 pages
Article/Chapter (Book)
Electronic Resource
English
Seismic Energy Loss in Semi-rigid Steel Frames Under Near-Field Earthquakes
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