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Evaluation of Aashto Seismic Design ...

Grismer, Andrew LeRoy.

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Evaluation of Aashto Seismic Design for Reinforced Concrete Bridge Columns.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Evaluation of Aashto Seismic Design for Reinforced Concrete Bridge Columns./
Author:	Grismer, Andrew LeRoy.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2024,
Description:	526 p.
Notes:	Source: Masters Abstracts International, Volume: 85-11.
Contained By:	Masters Abstracts International85-11.
Subject:	Architectural engineering. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31239747
ISBN:	9798382579818

Evaluation of Aashto Seismic Design for Reinforced Concrete Bridge Columns.
Grismer, Andrew LeRoy.

Evaluation of Aashto Seismic Design for Reinforced Concrete Bridge Columns. - Ann Arbor : ProQuest Dissertations & Theses, 2024 - 526 p.

Source: Masters Abstracts International, Volume: 85-11.

Thesis (M.S.)--South Dakota State University, 2024.

Bridge failure can be catastrophic resulting in casualties and limiting the accessibility and emergency response efforts. Ensuring a high level of ductility for bridge columns through sufficient design methods and detailing is the most important aspect of the modern seismic codes. Reinforced concrete (RC) bridge columns are widely used in multi-span bridges located in seismic regions of the nation due to their controlled ductility and durability. The objective of this study was to systematically evaluate the AASHTO seismic design requirements for RC bridge columns and to comment whether current bridge code is sufficient and safe. An extensive literature review was performed to understand how the analytical plastic hinge equation adopted by AASHTO was developed and new information on the equation limitations was presented. To systematically evaluate the accuracy and safety of AASHTO design methods, a comprehensive database of RC bridge column test data was compiled and modeling methods to perform moment-curvature analyses and pushover analyses, both allowed in AASHTO, were discussed using two software packages, OpenSees and SAP2000. The results of 1,600 analyses performed on the test specimens of the database were presented comparing the calculated and measured responses for each column. Subsequently, the results are synthesized by comparing the key points of the force-displacement relationships individually and collectively. It was found that for the circular RC bridge columns, the moment-curvature and pushover analyses were generally reliable and conservative in predicting the ultimate displacement, idealized yield displacements, and idealized yield baseshear values. Conversely, for the rectangular RC bridge columns, it was found that the moment-curvature and pushover analyses were substantially unconservative in predicting the ultimate displacements. Immediate action is recommended for AASHTO to revise the design methods for the rectangular RC bridge columns to make these column types reliable and safe for seismic applications.

ISBN: 9798382579818Subjects--Topical Terms:

3174102
Architectural engineering.
Subjects--Index Terms:

Bridge columns

Evaluation of Aashto Seismic Design for Reinforced Concrete Bridge Columns.
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100 1 $a Grismer, Andrew LeRoy. $3 3769465
245 1 0 $a Evaluation of Aashto Seismic Design for Reinforced Concrete Bridge Columns.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 526 p.
500 $a Source: Masters Abstracts International, Volume: 85-11.
500 $a Includes supplementary digital materials.
500 $a Advisor: Tazarv, Mostafa.
502 $a Thesis (M.S.)--South Dakota State University, 2024.
520 $a Bridge failure can be catastrophic resulting in casualties and limiting the accessibility and emergency response efforts. Ensuring a high level of ductility for bridge columns through sufficient design methods and detailing is the most important aspect of the modern seismic codes. Reinforced concrete (RC) bridge columns are widely used in multi-span bridges located in seismic regions of the nation due to their controlled ductility and durability. The objective of this study was to systematically evaluate the AASHTO seismic design requirements for RC bridge columns and to comment whether current bridge code is sufficient and safe. An extensive literature review was performed to understand how the analytical plastic hinge equation adopted by AASHTO was developed and new information on the equation limitations was presented. To systematically evaluate the accuracy and safety of AASHTO design methods, a comprehensive database of RC bridge column test data was compiled and modeling methods to perform moment-curvature analyses and pushover analyses, both allowed in AASHTO, were discussed using two software packages, OpenSees and SAP2000. The results of 1,600 analyses performed on the test specimens of the database were presented comparing the calculated and measured responses for each column. Subsequently, the results are synthesized by comparing the key points of the force-displacement relationships individually and collectively. It was found that for the circular RC bridge columns, the moment-curvature and pushover analyses were generally reliable and conservative in predicting the ultimate displacement, idealized yield displacements, and idealized yield baseshear values. Conversely, for the rectangular RC bridge columns, it was found that the moment-curvature and pushover analyses were substantially unconservative in predicting the ultimate displacements. Immediate action is recommended for AASHTO to revise the design methods for the rectangular RC bridge columns to make these column types reliable and safe for seismic applications.
590 $a School code: 0205.
650 4 $a Architectural engineering. $3 3174102
650 4 $a Environmental engineering. $3 548583
653 $a Bridge columns
653 $a Reinforced concrete
653 $a Seismic design
653 $a Emergency response efforts
690 $a 0543
690 $a 0775
690 $a 0462
710 2 $a South Dakota State University. $b Civil & Environmental Engineering. $3 3428881
773 0 $t Masters Abstracts International $g 85-11.
790 $a 0205
791 $a M.S.
792 $a 2024
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31239747