Monte-Carlo laboratory testing of unreinforced masonry veneer wall system under out-of-plane loading

2022 ◽  
Vol 321 ◽  
pp. 126334
Author(s):  
Imrose B. Muhit ◽  
Mark J. Masia ◽  
Mark G. Stewart
Keyword(s):  
Monte Carlo ◽  
Laboratory Testing ◽  
Unreinforced Masonry ◽  
Out Of Plane ◽  
Wall System

Out-of-plane strength reduction of unreinforced masonry walls because of in-plane damages

2015 ◽  
Vol 44 (13) ◽  
pp. 2157-2176 ◽  
Author(s):  
Kiarash M. Dolatshahi ◽  
Mohammad Yekrangnia
Keyword(s):  
Unreinforced Masonry ◽  
Strength Reduction ◽  
Masonry Walls ◽  
Out Of Plane

scholarly journals Effects of mortar compressive strength on out of plane response of unreinforced masonry walls

2021 ◽  
Vol 20 (2) ◽  
pp. 371-381
Author(s):  
Atabak Pourmohammad Sorkhab ◽  
◽  
Mesut Küçük ◽  
Ali Sari ◽  
◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Unreinforced Masonry ◽  
Infill Wall ◽  
Infill Walls ◽  
Clay Bricks ◽  
Mortar Strength ◽  
Load Carrying ◽  
Out Of Plane ◽  
Structural Behaviors ◽  
Major Crack

In this study, the out-of-plane response of infill walls that are widely used in Turkey and the surrounding regions were experimentally investigated. Several out-of-plane wall tests were performed in the laboratory, with the walls specimens produced with lateral hollow clay bricks (LHCB) and different mortar qualities. The walls were tested in their out-of-plane (OOP) direction under static load conditions and evaluated based on the load-bearing and energy dissipation capacities, crack propagations, mortar strengths, and initial stiffnesses. These walls are experimentally investigated to understand the effects of the mortar strength on the infill wall structural behaviors and to assess the effectiveness of the out-of-plane strength formulations. It was found that when the mortar strength is low, the first major crack occurs at the mortar, however, because of the arch mechanism efficiency in this situation the OOP load-carrying and energy dissipation capacities of unreinforced walls can be significantly increased. When the first major crack in the wall occurs in the brick itself, the arc mechanism is provided with delicate sections in the brick, which leads to strength decreasing in the walls. In this case, excessive deviations occur in the out-of-plane strength formulations estimates. This study shows that the arc mechanism, the damage start region and progress can change significantly unreinforced masonry (URM) infill walls behaviors.

Effect of in-plane damage on out-of-plane strength of unreinforced masonry walls

2013 ◽  
Vol 57 ◽  
pp. 1-11 ◽  
Author(s):  
Pawan Agnihotri ◽  
Vaibhav Singhal ◽  
Durgesh C. Rai
Keyword(s):  
Unreinforced Masonry ◽  
Masonry Walls ◽  
Out Of Plane

The Whittier Narrows, California Earthquake of October 1, 1987—Preliminary Evaluation of the Performance of Strengthened Unreinforced Masonry Buildings

1988 ◽  
Vol 4 (1) ◽  
pp. 197-212 ◽  
Author(s):  
T. A. Moore ◽  
J. H. Kobzeff ◽  
J. Diri ◽  
C. Arnold
Keyword(s):  
Los Angeles ◽  
Case Studies ◽  
Unreinforced Masonry ◽  
Preliminary Evaluation ◽  
Masonry Buildings ◽  
Plane Shear ◽  
Hazard Reduction ◽  
Out Of Plane ◽  
Shear Failures ◽  
Bending Failure

This report presents preliminary case studies of the performance of selected unreinforced masonry buildings during the Whittier Narrows Earthquakes. Attention is focused on buildings located in the downtown Los Angeles area which have been rehabilitated to conform with the Los Angeles hazard reduction Ordinance. There was no life loss or major injuries attributed to the response of unreinforced masonry buildings to the earthquakes. However, there was a significant number of both rehabilitated and non-strengthened buildings for which masonry peeled off upper story walls. This was mainly due to separation of the outer whythe of brick, or out-of-plane bending failure, and/or in-plane shear failures of wall piers, particularly at building corners. The falling bricks associated with these failures did present an injury hazard so it is important to investigate economical measures to minimize these hazards in future earthquakes.

scholarly journals Laboratory Testing of Strengthened Cavity Unreinforced Masonry Walls

2018 ◽  
Vol 144 (3) ◽  
pp. 04018005 ◽  
Author(s):  
Hossein Derakhshan ◽  
Wade Lucas ◽  
Phillip Visintin ◽  
Michael C. Griffith
Keyword(s):  
Laboratory Testing ◽  
Unreinforced Masonry ◽  
Masonry Walls

Damage Reconnaissance of Unreinforced Masonry Bearing Wall Buildings after the 2015 Gorkha, Nepal, Earthquake

2017 ◽  
Vol 33 (1_suppl) ◽  
pp. 243-273 ◽  
Author(s):  
Giuseppe Brando ◽  
Davide Rapone ◽  
Enrico Spacone ◽  
Matt S. O'Banion ◽  
Michael J. Olsen ◽  
...  
Keyword(s):  
Response Spectra ◽  
Visual Assessment ◽  
Unreinforced Masonry ◽  
Assessment Process ◽  
Gorkha Earthquake ◽  
Field Reconnaissance ◽  
2015 Gorkha Earthquake ◽  
Out Of Plane ◽  
2015 Gorkha Nepal Earthquake

This paper documents and analyzes the seismic behavior of unreinforced masonry (URM) buildings that were damaged by the 2015 Gorkha earthquake in Nepal, and reports on the performance of palaces, giving an overview on the failures suffered by significant examples of these monumental buildings. Field reconnaissance was completed through both rapid, in-situ visual assessment and state-of-the-art procedures utilizing light detection and ranging (lidar) and virtual reality (VR) technologies. Both the visual and virtual assessments were compared for 20 structures and were generally consistent; however, the virtual assessment process enabled detection of damage that could not be captured or was difficult to distinguish in the field observations. Further, both in-plane and out-of-plane mechanisms were analyzed and attributed to specific structural deficiencies that usually characterize poorly detailed masonry buildings. Moreover, wall overturning was correlated with the peculiarities of the pseudo-accelerations and rocking response spectra of the earthquake.

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