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Evaluating seismic collapse resistan...

Murray, Justin Adam.

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Evaluating seismic collapse resistance of non-ductile RC frame structures.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Evaluating seismic collapse resistance of non-ductile RC frame structures./
作者:	Murray, Justin Adam.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
面頁冊數:	298 p.
附註:	Source: Dissertation Abstracts International, Volume: 77-09(E), Section: B.
Contained By:	Dissertation Abstracts International77-09B(E).
標題:	Civil engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10105405
ISBN:	9781339688763

Evaluating seismic collapse resistance of non-ductile RC frame structures.
Murray, Justin Adam.

Evaluating seismic collapse resistance of non-ductile RC frame structures. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 298 p.

Source: Dissertation Abstracts International, Volume: 77-09(E), Section: B.

Thesis (Ph.D.)--Northeastern University, 2016.

This item is not available from ProQuest Dissertations & Theses.

Non-ductile reinforced concrete (RC) frame structures constructed prior to the mid-1970s are a major seismic risk. Column detailing requirements during this time period often resulted in inadequate transverse reinforcement, increasing the risk of shear-axial failure during a severe seismic event. The post-failure response of these shear-critical RC columns and of damaged nonductile buildings as a whole are not well understood due in part to limitations in the available experimental data. Additionally, current rehabilitation standards identify collapse based on element-level performance, neglecting the system-level collapse resistance after an initial damage.

ISBN: 9781339688763Subjects--Topical Terms:

860360
Civil engineering.

Evaluating seismic collapse resistance of non-ductile RC frame structures.
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506 $a This item is not available from ProQuest Dissertations & Theses.
520 $a Non-ductile reinforced concrete (RC) frame structures constructed prior to the mid-1970s are a major seismic risk. Column detailing requirements during this time period often resulted in inadequate transverse reinforcement, increasing the risk of shear-axial failure during a severe seismic event. The post-failure response of these shear-critical RC columns and of damaged nonductile buildings as a whole are not well understood due in part to limitations in the available experimental data. Additionally, current rehabilitation standards identify collapse based on element-level performance, neglecting the system-level collapse resistance after an initial damage.
520 $a In this project, to evaluate the seismic response of nonductile RC frame structures at both the element and system levels, a series of four hybrid simulations were conducted on RC structures representative of pre-1970s construction under severe seismic ground motion. Hybrid simulation is a method which combines physical test specimens with an analytical model to capture the response of an entire system. In each simulation, multiple full-scale RC columns were tested at the Multi-Axial Full Scale Sub-Structured Testing & Simulation (MUST-SIM) lab at the University of Illinois at Urbana Champaign. The remainder of the full three-dimensional structural system was modeled analytically in the computer program OpenSees. Shear-axial failures occurred in the physical specimens as a result of the ground motion, and the hybrid nature of the test allowed for study of the system-level response of the surrounding structural system.
520 $a In this project, current hybrid simulation practices were investigated and modified, modeling of the behaviors of RC elements under seismic loading were quantified and improved (including explicit study of bar slip deformations and shear-axial failure), shear-axial and flexural-shear-axial interactions were analyzed during column failure, the methods by which failure can propagate through a structure after initial damage were studied, and the contributions of the surrounding system to load redistribution were investigated. The differences between the four hybrid simulations highlight the effects of vertical ground motion and triaxial ground motion on a damaged structure. Most importantly, the hybrid simulations show that system-level response can prevent a column failure from propagating and leading to progressive collapse.
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