Simplified analytical models for partially grouted reinforced masonry shear walls

2022 ◽  
Vol 252 ◽  
pp. 113643
Author(s):  
Abdulelah Al-Ahdal ◽  
Nader Aly ◽  
Khaled Galal
Keyword(s):  
Shear Walls ◽  
Analytical Models ◽  
Reinforced Masonry

scholarly journals Experimental Investigation into the Seismic Performance of Prefabricated Reinforced Masonry Shear Walls with Vertical Joint Connections

2021 ◽  
Vol 11 (10) ◽  
pp. 4421
Author(s):  
Zhiming Zhang ◽  
Fenglai Wang
Keyword(s):  
Seismic Performance ◽  
Cross Sections ◽  
Shear Walls ◽  
Construction Method ◽  
Shear Capacity ◽  
Initial Stiffness ◽  
Equivalent Viscous Damping ◽  
Displacement Ductility ◽  
Reinforced Masonry ◽  
Cracking Performance

In this study, four single-story reinforced masonry shear walls (RMSWs) (two prefabricated and two cast-in-place) under reversed cyclic loading were tested to evaluate their seismic performance. The aim of the study was to evaluate the shear behavior of RMSWs with flanges at the wall ends as well as the effect of construction method. The test results showed that all specimens had a similar failure mode with diagonal cracking. However, the crack distribution was strongly influenced by the construction method. The lateral capacity of the prefabricated walls was 12% and 27% higher than that of the corresponding cast-in-place walls with respect to the rectangular and T-shaped cross sections. The prefabricated walls showed better post-cracking performance than did the cast-in-place wall. The secant stiffness of all the walls decreased rapidly to approximately 63% of the initial stiffness when the first major diagonal crack was observed. The idealized equivalent elastic-plastic system showed that the prefabricated walls had a greater displacement ductility of 3.2–4.8 than that of the cast-in-place walls with a displacement ductility value of 2.3–2.7. This proved that the vertical joints in prefabricated RMSWs enhanced the seismic performance of walls in shear capacity and ductility. In addition, the equivalent viscous damping of the specimens ranged from 0.13 to 0.26 for prefabricated and cast-in-place walls, respectively.

Out-of-Plane Performance of Reinforced Masonry Shear Walls Constructed with Boundary Elements

2019 ◽  
Vol 145 (8) ◽  
pp. 04019073 ◽  
Author(s):  
Tarek El-Hashimy ◽  
Mohamed Ezzeldin ◽  
Michael Tait ◽  
Wael El-Dakhakhni
Keyword(s):  
Shear Walls ◽  
Boundary Elements ◽  
Reinforced Masonry ◽  
Out Of Plane

scholarly journals Determination of Period of RC Buildings by the Ambient Vibration Method

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Mehmet Inel ◽  
Hayri Baytan Ozmen ◽  
Bayram Tanik Cayci
Keyword(s):  
Natural Vibration ◽  
Dynamic Properties ◽  
Shear Walls ◽  
Vibration Signal ◽  
Analytical Models ◽  
Ambient Vibration ◽  
Seismic Behaviour ◽  
Infill Wall ◽  
Infill Walls ◽  
Vibration Period

Determining the dynamic properties of structures is important for understanding their seismic behaviour. Ambient vibration signal measurement is one of the approaches used to determine the period of structures. Advantages of this method include the possibility of taking real-time records and presenting nondestructive and rapid solutions. In this study, natural vibration periods are calculated by taking ambient vibration signal records from 40 buildings. The height of the building, infill wall effect, presence of seismic retrofit, and presence of damage are taken into consideration, and their effects on natural vibration periods are investigated. Moreover, the results are compared with the analytical methods to reveal the differences. A significant correlation between the period and height of the building is observed. It is seen that the natural vibration periods of the buildings decrease by 7% to 30% (15% on average) due to infill wall contribution. However, the efficiency of infill walls decreases as the building height increases. Another significant result is that adding shear walls substantially decreases the vibration period values by 23% to 33% with respect to the shear wall ratio. When the analytical estimates and measured building period results are compared, it is seen that analytical models have closer period estimates before infill walls are implemented. The limited data in scope of the study suggest that significant differences may present in the analytical and measured periods of the buildings due to infill wall contributions.

Predictions of moment and deflection capacities of RC shear walls by different analytical models

Structures ◽  
2020 ◽  
Vol 26 ◽  
pp. 105-127
Author(s):  
A. Marzok ◽  
O. Lavan ◽  
A.N. Dancygier
Keyword(s):  
Shear Walls ◽  
Analytical Models

In‐Plane Resistance of Reinforced Masonry Shear Walls

1990 ◽  
Vol 116 (3) ◽  
pp. 619-640 ◽  
Author(s):  
P. B. Shing ◽  
M. Schuller ◽  
V. S. Hoskere
Keyword(s):  
Shear Walls ◽  
Reinforced Masonry

scholarly journals Out-of-plane instability of reinforced masonry uniaxial specimens under reversed cyclic axial loading

2017 ◽  
Vol 44 (5) ◽  
pp. 367-376 ◽  
Author(s):  
Nazli Azimikor ◽  
Svetlana Brzev ◽  
Kenneth J. Elwood ◽  
Donald L. Anderson ◽  
William McEwen
Keyword(s):  
Axial Loading ◽  
Shear Walls ◽  
Reinforcement Ratio ◽  
Design Parameters ◽  
Key Factors ◽  
Cyclic Tension ◽  
Reinforced Masonry ◽  
Out Of Plane ◽  
Tension And Compression ◽  
Reversed Cyclic

Results of a study performed on the out-of-plane instability of reinforced masonry shear walls (RMSW) under seismic loading are presented. The study was conducted to gain understanding of the out-of-plane instability mechanism and the key factors influencing its development through the testing of five reinforced masonry uniaxial specimens under reversed cyclic tension and compression. The specimens represented the end zone of a RMSW. The design parameters considered in the study included longitudinal reinforcement ratio and height-to-thickness ratio for the test specimens. It was found that onset of out-of-plane instability is strongly influenced by the level of tensile strains developed in the specimens, the reinforcement ratio, and the bar size. In this case, out-of-plane instability occurred when out-of-plane displacements exceeded the critical value equal to half the wall thickness. A study on full-scale RMSW specimens subjected to reversed cyclic loading, also undertaken under this research program, is expected to verify the findings of this study and contribute towards development of design criteria for out-of-plane stability of RMSW.

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