Seismic assessment of plain concrete arch bridges by three dimensional simulation using geometrical and mechanical properties

There are numerous old arch bridges in Iran that have been used as railway bridges for more than seventy years. Since most of these bridges are not designed for earthquake excitation, seismic vulnerability of these structures is uncertain. This fact necessitates the investigation of the earthquake r...

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Autores principales:	Adel Mahmoudi Moazam, Nemat Hassani, Mahdi Yazdani
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2018
Materias:	plain concrete arch bridge three dimensional finite element modeling nonlinear static analysis geometrical parameters seismic assessment Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/f3f56846c1bd40789e3968099375e4e2
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id	oai:doaj.org-article:f3f56846c1bd40789e3968099375e4e2
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spelling	oai:doaj.org-article:f3f56846c1bd40789e3968099375e4e22021-11-08T15:48:11ZSeismic assessment of plain concrete arch bridges by three dimensional simulation using geometrical and mechanical properties2476-39772538-261610.22065/jsce.2017.77523.1074https://doaj.org/article/f3f56846c1bd40789e3968099375e4e22018-07-01T00:00:00Zhttps://www.jsce.ir/article_48947_9db3e7318e6faeb80949215168e605ab.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616There are numerous old arch bridges in Iran that have been used as railway bridges for more than seventy years. Since most of these bridges are not designed for earthquake excitation, seismic vulnerability of these structures is uncertain. This fact necessitates the investigation of the earthquake resistance of these kinds of bridges. To evaluate complex behavior of these bridges, results of field tests are required. Since it is not possible to perform field tests for all arch bridges, these structures should be simulated correctly by computers for structural assessment. Several parameters are employed to describe the bridges, such as number of spans, length, geometrical and material properties. In this study, results of field tests are used and adapted for 32 three dimensional finite element models with various physical parameters. Modal deformations of bridges at longitudinal and transverse directions is perceived from nonlinear computer simulations. Furthermore, Seismic performance of these bridges is assessed by pushover analysis in two directions and the capacity curves of the structures and linear demand spectrum are obtained using nonlinear static analysis method suggested by the Iranian standard. The crown is selected as a control node in the pushover analysis and its influence on seismic performance of plain concrete arch bridges is considered. Finally, the demand levels of the bridges based on 475 return period earthquakes are determined and compared with capacity curves. The results show that the performance of longitudinal direction is better than transverse direction, but the earthquake resistance of these kinds of bridges totally depends on the material properties and geometry of the structures.Adel Mahmoudi MoazamNemat HassaniMahdi YazdaniIranian Society of Structrual Engineering (ISSE)articleplain concrete arch bridgethree dimensional finite element modelingnonlinear static analysisgeometrical parametersseismic assessmentBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 5, Iss 2, Pp 184-202 (2018)
institution	DOAJ
collection	DOAJ
language	FA
topic	plain concrete arch bridge three dimensional finite element modeling nonlinear static analysis geometrical parameters seismic assessment Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	plain concrete arch bridge three dimensional finite element modeling nonlinear static analysis geometrical parameters seismic assessment Bridge engineering TG1-470 Building construction TH1-9745 Adel Mahmoudi Moazam Nemat Hassani Mahdi Yazdani Seismic assessment of plain concrete arch bridges by three dimensional simulation using geometrical and mechanical properties
description	There are numerous old arch bridges in Iran that have been used as railway bridges for more than seventy years. Since most of these bridges are not designed for earthquake excitation, seismic vulnerability of these structures is uncertain. This fact necessitates the investigation of the earthquake resistance of these kinds of bridges. To evaluate complex behavior of these bridges, results of field tests are required. Since it is not possible to perform field tests for all arch bridges, these structures should be simulated correctly by computers for structural assessment. Several parameters are employed to describe the bridges, such as number of spans, length, geometrical and material properties. In this study, results of field tests are used and adapted for 32 three dimensional finite element models with various physical parameters. Modal deformations of bridges at longitudinal and transverse directions is perceived from nonlinear computer simulations. Furthermore, Seismic performance of these bridges is assessed by pushover analysis in two directions and the capacity curves of the structures and linear demand spectrum are obtained using nonlinear static analysis method suggested by the Iranian standard. The crown is selected as a control node in the pushover analysis and its influence on seismic performance of plain concrete arch bridges is considered. Finally, the demand levels of the bridges based on 475 return period earthquakes are determined and compared with capacity curves. The results show that the performance of longitudinal direction is better than transverse direction, but the earthquake resistance of these kinds of bridges totally depends on the material properties and geometry of the structures.
format	article
author	Adel Mahmoudi Moazam Nemat Hassani Mahdi Yazdani
author_facet	Adel Mahmoudi Moazam Nemat Hassani Mahdi Yazdani
author_sort	Adel Mahmoudi Moazam
title	Seismic assessment of plain concrete arch bridges by three dimensional simulation using geometrical and mechanical properties
title_short	Seismic assessment of plain concrete arch bridges by three dimensional simulation using geometrical and mechanical properties
title_full	Seismic assessment of plain concrete arch bridges by three dimensional simulation using geometrical and mechanical properties
title_fullStr	Seismic assessment of plain concrete arch bridges by three dimensional simulation using geometrical and mechanical properties
title_full_unstemmed	Seismic assessment of plain concrete arch bridges by three dimensional simulation using geometrical and mechanical properties
title_sort	seismic assessment of plain concrete arch bridges by three dimensional simulation using geometrical and mechanical properties
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2018
url	https://doaj.org/article/f3f56846c1bd40789e3968099375e4e2
work_keys_str_mv	AT adelmahmoudimoazam seismicassessmentofplainconcretearchbridgesbythreedimensionalsimulationusinggeometricalandmechanicalproperties AT nemathassani seismicassessmentofplainconcretearchbridgesbythreedimensionalsimulationusinggeometricalandmechanicalproperties AT mahdiyazdani seismicassessmentofplainconcretearchbridgesbythreedimensionalsimulationusinggeometricalandmechanicalproperties
_version_	1718441714580979712

Seismic assessment of plain concrete arch bridges by three dimensional simulation using geometrical and mechanical properties

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