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Self-Centering, Shear-Controlling Rocking-Isolation Podium System for Enhanced Resilience of Tall Buildings.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Self-Centering, Shear-Controlling Rocking-Isolation Podium System for Enhanced Resilience of Tall Buildings./
作者:
Zhong, Chiyun.
面頁冊數:
1 online resource (351 pages)
附註:
Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
Contained By:
Dissertations Abstracts International85-01B.
標題:
Civil engineering. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30249714click for full text (PQDT)
ISBN:
9798379770457
Self-Centering, Shear-Controlling Rocking-Isolation Podium System for Enhanced Resilience of Tall Buildings.
Zhong, Chiyun.
Self-Centering, Shear-Controlling Rocking-Isolation Podium System for Enhanced Resilience of Tall Buildings.
- 1 online resource (351 pages)
Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
Thesis (Ph.D.)--University of Toronto (Canada), 2023.
Includes bibliographical references
The seismic performance of tall buildings has become a major consideration for the sustainable and resilient development of urban centers in earthquake-prone regions. One of the most critical design challenges using current prescriptive code-based design methods is to properly account for the contribution of higher modes of vibrations to the overall dynamic response of these structures, especially for reinforced concrete shear wall structures that are commonly used in tall building developments. It has been widely acknowledged that the actual seismic demands in these systems can be much larger than predicted when using simplified design equations. These higher-mode effects are primarily attributed to the amplified dynamic response of tall buildings at higher frequency modes that are not controlled by the designated plastic-hinging mechanism at the base. This amplified dynamic response can cause unexpectedly higher structural and non-structural damage, making these tall buildings more susceptible to service disruptions and extensive repairs following a major earthquake.Working towards more sustainable and resilient cities, the overarching objective of this thesis is to develop and validate a novel base system that can mitigate higher-mode effects and enhance the overall seismic performance of tall buildings. The proposed system is a dual base-mechanism system that enables independent control of the shear force and overturning moment demands at the base of tall buildings to mitigate higher-mode effects, while eliminating residual deformations and high-stress concentrations within the structure that otherwise would need to be designed for. A schematic overview of the proposed system is first presented, followed by the detailed design and numerical validation of a practical implementation of the system based on a benchmark 42-story tall building. Extensive shake table tests are performed on a scaled specimen with and without the proposed system, which experimentally demonstrated the enhanced seismic performance of the specimen with the proposed system. To better understand the influence of the proposed system on the overall seismic behaviour of tall buildings, a generalized parametric study was conducted. Based on these numerical and experimental studies, a comprehensive performance-based design methodology was developed and validated to assist engineers in the detailing of proposed system and the capacity design of the structures above.
Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023
Mode of access: World Wide Web
ISBN: 9798379770457Subjects--Topical Terms:
860360
Civil engineering.
Subjects--Index Terms:
Base mechanismIndex Terms--Genre/Form:
542853
Electronic books.
Self-Centering, Shear-Controlling Rocking-Isolation Podium System for Enhanced Resilience of Tall Buildings.
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Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
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The seismic performance of tall buildings has become a major consideration for the sustainable and resilient development of urban centers in earthquake-prone regions. One of the most critical design challenges using current prescriptive code-based design methods is to properly account for the contribution of higher modes of vibrations to the overall dynamic response of these structures, especially for reinforced concrete shear wall structures that are commonly used in tall building developments. It has been widely acknowledged that the actual seismic demands in these systems can be much larger than predicted when using simplified design equations. These higher-mode effects are primarily attributed to the amplified dynamic response of tall buildings at higher frequency modes that are not controlled by the designated plastic-hinging mechanism at the base. This amplified dynamic response can cause unexpectedly higher structural and non-structural damage, making these tall buildings more susceptible to service disruptions and extensive repairs following a major earthquake.Working towards more sustainable and resilient cities, the overarching objective of this thesis is to develop and validate a novel base system that can mitigate higher-mode effects and enhance the overall seismic performance of tall buildings. The proposed system is a dual base-mechanism system that enables independent control of the shear force and overturning moment demands at the base of tall buildings to mitigate higher-mode effects, while eliminating residual deformations and high-stress concentrations within the structure that otherwise would need to be designed for. A schematic overview of the proposed system is first presented, followed by the detailed design and numerical validation of a practical implementation of the system based on a benchmark 42-story tall building. Extensive shake table tests are performed on a scaled specimen with and without the proposed system, which experimentally demonstrated the enhanced seismic performance of the specimen with the proposed system. To better understand the influence of the proposed system on the overall seismic behaviour of tall buildings, a generalized parametric study was conducted. Based on these numerical and experimental studies, a comprehensive performance-based design methodology was developed and validated to assist engineers in the detailing of proposed system and the capacity design of the structures above.
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