Determination of Partial Safety Factors (γM) for Model Uncertainties for Persian Historical Masonry Materials

According to the Eurocode, the partial safety factor (γM) is a coefficient related to the material properties considering the uncertainties in geometry and modeling, which design value for the material properties are determined by dividing the actual value of the material properties by this coeffici...

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Autores principales:	Mehrdad Ghamari, Mohammad Saeed Karimi, Abdulazim Amirshahkarami
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2021
Materias:	masonry shear wall persian historical masonry uncertainty lateral constraints nonlinear pushover analysis lateral load-bearing capacity the partial safety factor (γm) Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/bd9abfae5572435f9776387f94100656
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spelling	oai:doaj.org-article:bd9abfae5572435f9776387f941006562021-11-08T15:54:55ZDetermination of Partial Safety Factors (γM) for Model Uncertainties for Persian Historical Masonry Materials2476-39772538-261610.22065/jsce.2020.200249.1943https://doaj.org/article/bd9abfae5572435f9776387f941006562021-07-01T00:00:00Zhttps://www.jsce.ir/article_101736_c308e8311fc25e7baff4849d97b67e5c.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616According to the Eurocode, the partial safety factor (γM) is a coefficient related to the material properties considering the uncertainties in geometry and modeling, which design value for the material properties are determined by dividing the actual value of the material properties by this coefficient. In this paper, determination of γM considering uncertainties for the Persian historical masonry shear wall was studied. To this aim, behavior of different specimens of masonry shear walls (with constant thickness) under in-plane shear loading and constant pre-compression with four different aspect ratios (height to length) and six different boundary constraints (under the effect of lateral walls and ceiling), by considering the uncertainty effect for two parameters of modulus of elasticity and thickness of wall were studied by the nonlinear pushover analyses. The results showed that by increasing the aspect ratio, the lateral shear strength of the walls decreases and γM is increased, whilst by increasing the boundary constraints, shear strength of the walls increases and γM decreases. The more impact of the horizontal component (ceiling) was observed, as compared to the vertical component in one direction, increases the boundary constraints and the lateral load-bearing capacity. It was also observed that the decrease in the initial shear stiffness of the walls was characterized by an increase in the wall aspect ratio, although this parameter changed slightly with changes in boundary constraints. In conclusion, the value of γM for the Persian historical masonry shear wall materials is proposed between 1.1 to 1.8.Mehrdad GhamariMohammad Saeed KarimiAbdulazim AmirshahkaramiIranian Society of Structrual Engineering (ISSE)articlemasonry shear wallpersian historical masonryuncertaintylateral constraintsnonlinear pushover analysislateral load-bearing capacitythe partial safety factor (γm)Bridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 8, Iss 5, Pp 315-332 (2021)
institution	DOAJ
collection	DOAJ
language	FA
topic	masonry shear wall persian historical masonry uncertainty lateral constraints nonlinear pushover analysis lateral load-bearing capacity the partial safety factor (γm) Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	masonry shear wall persian historical masonry uncertainty lateral constraints nonlinear pushover analysis lateral load-bearing capacity the partial safety factor (γm) Bridge engineering TG1-470 Building construction TH1-9745 Mehrdad Ghamari Mohammad Saeed Karimi Abdulazim Amirshahkarami Determination of Partial Safety Factors (γM) for Model Uncertainties for Persian Historical Masonry Materials
description	According to the Eurocode, the partial safety factor (γM) is a coefficient related to the material properties considering the uncertainties in geometry and modeling, which design value for the material properties are determined by dividing the actual value of the material properties by this coefficient. In this paper, determination of γM considering uncertainties for the Persian historical masonry shear wall was studied. To this aim, behavior of different specimens of masonry shear walls (with constant thickness) under in-plane shear loading and constant pre-compression with four different aspect ratios (height to length) and six different boundary constraints (under the effect of lateral walls and ceiling), by considering the uncertainty effect for two parameters of modulus of elasticity and thickness of wall were studied by the nonlinear pushover analyses. The results showed that by increasing the aspect ratio, the lateral shear strength of the walls decreases and γM is increased, whilst by increasing the boundary constraints, shear strength of the walls increases and γM decreases. The more impact of the horizontal component (ceiling) was observed, as compared to the vertical component in one direction, increases the boundary constraints and the lateral load-bearing capacity. It was also observed that the decrease in the initial shear stiffness of the walls was characterized by an increase in the wall aspect ratio, although this parameter changed slightly with changes in boundary constraints. In conclusion, the value of γM for the Persian historical masonry shear wall materials is proposed between 1.1 to 1.8.
format	article
author	Mehrdad Ghamari Mohammad Saeed Karimi Abdulazim Amirshahkarami
author_facet	Mehrdad Ghamari Mohammad Saeed Karimi Abdulazim Amirshahkarami
author_sort	Mehrdad Ghamari
title	Determination of Partial Safety Factors (γM) for Model Uncertainties for Persian Historical Masonry Materials
title_short	Determination of Partial Safety Factors (γM) for Model Uncertainties for Persian Historical Masonry Materials
title_full	Determination of Partial Safety Factors (γM) for Model Uncertainties for Persian Historical Masonry Materials
title_fullStr	Determination of Partial Safety Factors (γM) for Model Uncertainties for Persian Historical Masonry Materials
title_full_unstemmed	Determination of Partial Safety Factors (γM) for Model Uncertainties for Persian Historical Masonry Materials
title_sort	determination of partial safety factors (γm) for model uncertainties for persian historical masonry materials
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2021
url	https://doaj.org/article/bd9abfae5572435f9776387f94100656
work_keys_str_mv	AT mehrdadghamari determinationofpartialsafetyfactorsgmformodeluncertaintiesforpersianhistoricalmasonrymaterials AT mohammadsaeedkarimi determinationofpartialsafetyfactorsgmformodeluncertaintiesforpersianhistoricalmasonrymaterials AT abdulazimamirshahkarami determinationofpartialsafetyfactorsgmformodeluncertaintiesforpersianhistoricalmasonrymaterials
_version_	1718441603804168192

Determination of Partial Safety Factors (γM) for Model Uncertainties for Persian Historical Masonry Materials

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