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Uncoupled Base Rocking and Shear Mec...

Tong, Fei.

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Uncoupled Base Rocking and Shear Mechanisms for Controlling Higher-Mode Effects in High-Rise Buildings.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Uncoupled Base Rocking and Shear Mechanisms for Controlling Higher-Mode Effects in High-Rise Buildings./
作者:	Tong, Fei.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:	317 p.
附註:	Source: Dissertations Abstracts International, Volume: 82-06, Section: B.
Contained By:	Dissertations Abstracts International82-06B.
標題:	Civil engineering. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28095085
ISBN:	9798698549772

Uncoupled Base Rocking and Shear Mechanisms for Controlling Higher-Mode Effects in High-Rise Buildings.
Tong, Fei.

Uncoupled Base Rocking and Shear Mechanisms for Controlling Higher-Mode Effects in High-Rise Buildings. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 317 p.

Source: Dissertations Abstracts International, Volume: 82-06, Section: B.

Thesis (Ph.D.)--University of Toronto (Canada), 2020.

This item must not be sold to any third party vendors.

While modern seismic design philosophies prioritize life safety under major earthquakes, structural damage is not precluded. As for high-rise buildings, earthquake-induced damage can be rather extensive and exacerbated as a result of higher-mode effects. This may lead to repair and replacement being infeasible or uneconomical.A large body of research has been conducted on low-damage systems for high-rise buildings. Concepts involved in these systems essentially fall into three categories including rocking mechanisms, seismic isolation, and the combination thereof. While rocking systems have limited efficiency in limiting higher-mode effects, , base isolation can also be challenging for high-rise buildings due to base isolators being overloaded axially while undergoing significant lateral deformations. Combining both concepts by allowing base-isolated structures to rock at the base as well cannot fully resolve all these problems, leading to design and implementation challenges.This dissertation proposes a novel system consisting of uncoupled rocking and shear mechanisms incorporated at the base of RC core-wall buildings. Acting in parallel, the dual mechanism allows for an independent control of the flexural and shear responses of structures and an effective mitigation of the higher-mode response. A physical implementation is developed for the proposed system after the fundamental kinematics defining the system are understood. This physical embodiment is then designed, detailed, and numerically validated using a reference 42-storey benchmark building. Results of extensive nonlinear dynamic analyses indicate that the proposed system is efficient in mitigating higher-mode effects and minimizing damage to RC core-wall high-rise buildings. To generalize the design of the proposed system, closed-form analytical studies and parametric nonlinear time history analyses are conducted. Based on these analyses, general procedures are developed for the preliminary design of the proposed system.

ISBN: 9798698549772Subjects--Topical Terms:

860360
Civil engineering.
Subjects--Index Terms:

High-rise buildings

Uncoupled Base Rocking and Shear Mechanisms for Controlling Higher-Mode Effects in High-Rise Buildings.
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300 $a 317 p.
500 $a Source: Dissertations Abstracts International, Volume: 82-06, Section: B.
500 $a Advisor: Christopoulos, Constantin.
502 $a Thesis (Ph.D.)--University of Toronto (Canada), 2020.
506 $a This item must not be sold to any third party vendors.
520 $a While modern seismic design philosophies prioritize life safety under major earthquakes, structural damage is not precluded. As for high-rise buildings, earthquake-induced damage can be rather extensive and exacerbated as a result of higher-mode effects. This may lead to repair and replacement being infeasible or uneconomical.A large body of research has been conducted on low-damage systems for high-rise buildings. Concepts involved in these systems essentially fall into three categories including rocking mechanisms, seismic isolation, and the combination thereof. While rocking systems have limited efficiency in limiting higher-mode effects, , base isolation can also be challenging for high-rise buildings due to base isolators being overloaded axially while undergoing significant lateral deformations. Combining both concepts by allowing base-isolated structures to rock at the base as well cannot fully resolve all these problems, leading to design and implementation challenges.This dissertation proposes a novel system consisting of uncoupled rocking and shear mechanisms incorporated at the base of RC core-wall buildings. Acting in parallel, the dual mechanism allows for an independent control of the flexural and shear responses of structures and an effective mitigation of the higher-mode response. A physical implementation is developed for the proposed system after the fundamental kinematics defining the system are understood. This physical embodiment is then designed, detailed, and numerically validated using a reference 42-storey benchmark building. Results of extensive nonlinear dynamic analyses indicate that the proposed system is efficient in mitigating higher-mode effects and minimizing damage to RC core-wall high-rise buildings. To generalize the design of the proposed system, closed-form analytical studies and parametric nonlinear time history analyses are conducted. Based on these analyses, general procedures are developed for the preliminary design of the proposed system.
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