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Design Basis Ground Motion for Base Isolated Structures
https://orcid.org/http://orcid.org/0000-0001-7952-0655
https://orcid.org/http://orcid.org/0000-0002-0029-5174
An increasing number of important structures, such as tall buildings, long-span bridges, large storage tanks, major pipelines, and tunnels, and most importantly, seismically isolated structures render the rational characterization of long-period ground motion for their reliable earthquake-resistant design. As such, the assessment of long-period ground motion has gained growing interest in the structural engineering discipline. The importance of the long-period component of earthquake ground motion has been recognized worldwide during numerous strong earthquakes. Two types of ground motions, with their own unique properties, are considered long‐period strong earthquake ground motion. One of them is the harmonic earthquake ground motion, which reflects the earthquake’s specific source and propagation characteristics on the surface waves and/or the soil amplification effects in deep sedimentary basins, the so-called basin response effects. The other one is the near-fault, pulse like earthquake ground motion, generated mainly by the rupture directivity effects. The philosophy of the direct displacement-based design, which has gained recognition as a more rational approach to designing earthquake-resistant structures, essentially relies on the displacement response spectra. Although there are several physical models and the associated numerical techniques to simulate ground motions, they do not give consistent results, and their indiscriminate use does not necessarily yield reliable estimates of ground motions for design. The application of methods for earthquake-resistant design based on displacement demand is thus affected by the inaccurate definition of spectral response in the long-period range. There is a strong need for the development of robust and reliable techniques for the assessment of long-period earthquake ground motions, especially for near-fault conditions. This paper will review and discuss the issues involved in the frequency and time domain characterization of strong ground motion in the long period ranges including displacement spectrum, peak ground displacement, basin response effects, and near-fault effects with relevant code stipulations regarding the design of the seismically isolated structures. Emphasis will be placed on the near-fault pulse-type long-period ground motions.
Design Basis Ground Motion for Base Isolated Structures
https://orcid.org/http://orcid.org/0000-0001-7952-0655
https://orcid.org/http://orcid.org/0000-0002-0029-5174
An increasing number of important structures, such as tall buildings, long-span bridges, large storage tanks, major pipelines, and tunnels, and most importantly, seismically isolated structures render the rational characterization of long-period ground motion for their reliable earthquake-resistant design. As such, the assessment of long-period ground motion has gained growing interest in the structural engineering discipline. The importance of the long-period component of earthquake ground motion has been recognized worldwide during numerous strong earthquakes. Two types of ground motions, with their own unique properties, are considered long‐period strong earthquake ground motion. One of them is the harmonic earthquake ground motion, which reflects the earthquake’s specific source and propagation characteristics on the surface waves and/or the soil amplification effects in deep sedimentary basins, the so-called basin response effects. The other one is the near-fault, pulse like earthquake ground motion, generated mainly by the rupture directivity effects. The philosophy of the direct displacement-based design, which has gained recognition as a more rational approach to designing earthquake-resistant structures, essentially relies on the displacement response spectra. Although there are several physical models and the associated numerical techniques to simulate ground motions, they do not give consistent results, and their indiscriminate use does not necessarily yield reliable estimates of ground motions for design. The application of methods for earthquake-resistant design based on displacement demand is thus affected by the inaccurate definition of spectral response in the long-period range. There is a strong need for the development of robust and reliable techniques for the assessment of long-period earthquake ground motions, especially for near-fault conditions. This paper will review and discuss the issues involved in the frequency and time domain characterization of strong ground motion in the long period ranges including displacement spectrum, peak ground displacement, basin response effects, and near-fault effects with relevant code stipulations regarding the design of the seismically isolated structures. Emphasis will be placed on the near-fault pulse-type long-period ground motions.
Design Basis Ground Motion for Base Isolated Structures
https://orcid.org/http://orcid.org/0000-0001-7952-0655
https://orcid.org/http://orcid.org/0000-0002-0029-5174
An increasing number of important structures, such as tall buildings, long-span bridges, large storage tanks, major pipelines, and tunnels, and most importantly, seismically isolated structures render the rational characterization of long-period ground motion for their reliable earthquake-resistant design. As such, the assessment of long-period ground motion has gained growing interest in the structural engineering discipline. The importance of the long-period component of earthquake ground motion has been recognized worldwide during numerous strong earthquakes. Two types of ground motions, with their own unique properties, are considered long‐period strong earthquake ground motion. One of them is the harmonic earthquake ground motion, which reflects the earthquake’s specific source and propagation characteristics on the surface waves and/or the soil amplification effects in deep sedimentary basins, the so-called basin response effects. The other one is the near-fault, pulse like earthquake ground motion, generated mainly by the rupture directivity effects. The philosophy of the direct displacement-based design, which has gained recognition as a more rational approach to designing earthquake-resistant structures, essentially relies on the displacement response spectra. Although there are several physical models and the associated numerical techniques to simulate ground motions, they do not give consistent results, and their indiscriminate use does not necessarily yield reliable estimates of ground motions for design. The application of methods for earthquake-resistant design based on displacement demand is thus affected by the inaccurate definition of spectral response in the long-period range. There is a strong need for the development of robust and reliable techniques for the assessment of long-period earthquake ground motions, especially for near-fault conditions. This paper will review and discuss the issues involved in the frequency and time domain characterization of strong ground motion in the long period ranges including displacement spectrum, peak ground displacement, basin response effects, and near-fault effects with relevant code stipulations regarding the design of the seismically isolated structures. Emphasis will be placed on the near-fault pulse-type long-period ground motions.
Design Basis Ground Motion for Base Isolated Structures
Lecture Notes in Civil Engineering
Sadan, Bahadir (Herausgeber:in) / Tuzun, Cuneyt (Herausgeber:in) / Erdik, Mustafa (Herausgeber:in) / Erdik, Mustafa (Autor:in) / Demircioglu-Tumsa, Mine B. (Autor:in)
World Conference on Seismic Isolation ; 2023 ; Antalya, Türkiye
Seismic Isolation, Energy Dissipation and Active Vibration Control of Structures ; Kapitel: 51 ; 645-682
29.09.2024
38 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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