A METHOD TO ENHANCE SEISMIC PERFORMANCES OF UNREINFORCED MASONRY STRUCTURES DERIVED FROM LATERAL FORCE RESISTING MECHANISMS OF MASONRY INFILLED FRAMES

This paper presents a new formula to estimate the ultimate lateral force of unreinforced masonry structures. The ratio of the wall's height to the wall's width is used to predict the ultimate lateral load of the wall. The coefficient is determined by the numerical implementation of an interface model to simulate the behavior of mortar joints in masonry walls. The numerical predictions are compared with the FEMA guidelines and the experimental data. The comparisons show that the loads that are predicted by the proposed formula have a lower error percentage than the FEMA guidelines. Thus, the proposed formula can be used to analyze unreinforced masonry structures.

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An Analytical Modeling Framework for the Seismic Risk Assessment of Unreinforced Masonry Structures

Structures Congress 2014 ◽

10.1061/9780784413357.006 ◽

2014 ◽

Cited By ~ 1

Author(s):

A. P. O'Donnell ◽

Y. C. Kurama

Keyword(s):

Risk Assessment ◽

Seismic Risk ◽

Analytical Modeling ◽

Unreinforced Masonry ◽

Masonry Structures ◽

Modeling Framework ◽

Seismic Risk Assessment

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Modelling imperfections in unreinforced masonry structures: Discrete element simulations and scale model experiments of a pavilion vault

Engineering Structures ◽

10.1016/j.engstruct.2020.111499 ◽

2021 ◽

Vol 228 ◽

pp. 111499

Author(s):

Alessandro Dell'Endice ◽

Antonino Iannuzzo ◽

Matthew J. DeJong ◽

Tom Van Mele ◽

Philippe Block

Keyword(s):

Discrete Element ◽

Unreinforced Masonry ◽

Scale Model ◽

Masonry Structures ◽

Model Experiments ◽

Discrete Element Simulations

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Experimental Out-Of-Plane Behavior of Brick Masonry Infilled Frames

International Journal of Architectural Heritage ◽

10.1080/15583058.2018.1529207 ◽

2018 ◽

Vol 14 (2) ◽

pp. 221-237 ◽

Cited By ~ 8

Author(s):

Farhad Akhoundi ◽

Graça Vasconcelos ◽

Paulo Lourenço

Keyword(s):

Brick Masonry ◽

Infilled Frames ◽

Out Of Plane ◽

Masonry Infilled Frames

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The Benefits of a Seismic Retrofit Program for Commercial Unreinforced Masonry Structures: Salt Lake County, Utah

Earthquake Spectra ◽

10.1193/1.1585702 ◽

1993 ◽

Vol 9 (1) ◽

pp. 1-10

Author(s):

Philip C. Emmi ◽

Carl A. Horton

Keyword(s):

Salt Lake ◽

Exposure Period ◽

Seismic Retrofit ◽

Unreinforced Masonry ◽

Masonry Structures ◽

Damage Functions ◽

Lake County ◽

Evaluation Time ◽

Comparative Risk ◽

Uniform Code

This paper assesses the benefits of a seismic retrofit program for commercial unreinforced masonry structures (CURMs) in Salt Lake County, Utah. A comparative risk assessment embedded in a geographic information systems is the method used. A policy evaluation time horizon of twenty years is set. Future rates of demolition and rehabilitation, with and without a retrofit policy, are assumed. Damage functions for ordinary and retrofitted URMs are used to assess losses having a 10 percent chance of being exceeded over a 50-year exposure period. With a retrofit program, expected losses are reduced by 57 percent or more than a quarter billion dollars when compared to the no-policy scenario. Expected injuries and fatalities are reduced by more than 80 percent. These are minimal benefits expected from enforcement of the seismic provisions of the Uniform Code of Building Conservation.

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