Fracture mechanics in the characterisation of brick masonry structures

10.1617/13598 ◽  
2005 ◽  
Vol 34 (238) ◽  
pp. 217-223
Author(s):  
R. S. Olivito
Keyword(s):  
Fracture Mechanics ◽  
Brick Masonry ◽  
Masonry Structures

scholarly journals An Assessment of Brick Masonry Strengthening Practice by Special Methods

2019 ◽  
Vol 8 (3) ◽  
pp. 1529-1533
Keyword(s):  
Conventional Method ◽  
Cementitious Materials ◽  
Masonry Wall ◽  
Brick Masonry ◽  
Wire Mesh ◽  
Suitable Method ◽  
Structural Performance ◽  
Masonry Structures ◽  
Excellent Performance ◽  
Metal Mesh

This study aims to identify the best suitable method to enhance strength and the structural performance of masonry. There are different techniques available to strengthen the existing and new masonry structures. This paper deals the metal/mesh embedment in the masonry wall, strengthening by added different polymers and textile strips, masonry grout, engineered cementitious materials (ECC) and interlocking masonry method. The comparison of different unique masonry strengthening methods helps us to provide a better suggestion for construction issues. In contrast to the conventional method, welded wire mesh gives better results than all other ways. Also, embedment of TRM, ECC, FRP, GFRP, CFRP, and interlocking holds an excellent performance in some other aspects.

Typical brick masonry walls reinforced with high-strength mortar and steel bars in the horizontal joints

2021 ◽  
pp. 136943322110122
Author(s):  
Xinqiang Yao ◽  
Bin Liang ◽  
Hai Zhang ◽  
Ziliang Zhang ◽  
Zheng He
Keyword(s):  
Cement Mortar ◽  
High Strength ◽  
Shear Capacity ◽  
Brick Masonry ◽  
Masonry Walls ◽  
Masonry Structures ◽  
Test Plan ◽  
Static Tests ◽  
Rural Buildings ◽  
Steel Bars

Based on investigation of rural buildings in china, there are more than 20% of the masonry structures constructed in 1970s. Thus, the old blue bricks (OBB) and old red bricks (ORB), which demolished from the typical brick masonry structures was built in 1970s, was chosen in the test. During demolishing the OBB and ORB, the original mortar was destroyed. Thus, the 1:7.8 cement mortar was chosen instead of original mortars and the 1:5 cement mortar was chosen as the reinforcement mortar. In order to know the performant of the reinforcement methods, there are three-level test plan was put forward in the study. Firstly, the mechanical properties of OBB and ORB and mortars was tested; Secondly, the experiment tested the shear strength of the reinforced and unreinforced masonry specimens along mortar joints; Thirdly, there are four walls (OBB reinforced wall and unreinforced wall, ORB reinforced wall and unreinforced wall) have been made for the pseudo-static tests. This research conducted physical performance tests on masonry bricks, masonry components, and masonry walls of typical masonry structures. Through experiments, the shear capacity of the masonry structure reinforced by high-strength mortar and steel bars can be obtained.

scholarly journals Evaluation of the Mechanical Behavior of Local Brick Masonry in Pakistan

2019 ◽  
Vol 9 (3) ◽  
pp. 4298-4300
Author(s):  
T. M. Shah ◽  
A. Kumar ◽  
S. N. R. Shah ◽  
A. A. Jhatial ◽  
M. H. Janwery
Keyword(s):  
Mechanical Behavior ◽  
Construction Material ◽  
Brick Masonry ◽  
Thickness Ratio ◽  
Masonry Structures ◽  
Crushing Strength ◽  
Load Bearing ◽  
The Past ◽  
The World ◽  
Considerable Damage

Masonry is the oldest form of construction in the world [1]. Research shows that it is the most widely used construction material in Pakistan and it has remained as such for more than the past hundred years. The majority of buildings in Pakistan are load-bearing burnt-brick masonry structures. Unfortunately, the brick masonry structures in Pakistan are not designed with respect to any regulatory code, because none exist. Consequently, these structures are not constructed according to a safe design and thus become hazardous and often face considerable damage and sometimes prove to be fatal. This study aims to study the behavior of local brick masonry under normal, shear and thermally challenging conditions and to model its behavior by relating the crushing strength (f’m) to the height-to-thickness ratio and temperature.

Numerical modeling of confined brick masonry structures with parametric analysis and energy absorption calculation

2020 ◽  
pp. 204141962094773
Author(s):  
H Asfandyar Ahmed ◽  
Khan Shahzada
Keyword(s):  
Energy Absorption ◽  
Structural Response ◽  
Damage Mechanism ◽  
Lateral Load ◽  
Masonry Structure ◽  
Brick Masonry ◽  
Masonry Structures ◽  
Plane Shear ◽  
Modeling Approach ◽  
Macro Modeling

The objective of this paper is to propose a new modeling methodology for numerical analysis of full-scale confined brick masonry structures. Two modeling strategies are used within a single structure, where the in-plane walls are modeled using “simplified micro-modeling” approach and out-of-plane walls are modeled using “macro-modeling” approach. The lateral load capacity is associated with the in-plane shear resistance of masonry elements, therefore more detailed analysis is required for in-plane walls to achieve a comprehensive understanding of the damage mechanism and load transfer. The investigation of the in-plane shear behavior of confined brick masonry structures is of significant importance. Additionally, the proposed hybrid model is validated by comparing the results of experimental studies of confined brick masonry structure. A parametric study is then conducted to investigate the effect of brick and mortar properties on the structural response metrics (e.g. base shear coefficient, effective stiffness, response modification factor, the three performance levels (i.e. Immediate Occupancy, Life Safety and Collapse Prevention limits) and the energy absorption properties). It is observed that these structural response metrics, changed considerably by varying the material properties. Apart from that, the damage behavior and damage pattern are also assessed for the better understanding of effect of these parameters on the response of the structure. The proposed hybrid-modeling approach gives sufficient accuracy in predicting the lateral load behavior as well as the damage mechanism of confined brick masonry structure, subjected to lateral loading.

scholarly journals Sustainable Brick Masonry Bond Design and Analysis: An Application of a Decision-Making Technique

2019 ◽  
Vol 9 (20) ◽  
pp. 4313
Author(s):  
Shah ◽  
Arshad ◽  
Farhan ◽  
Raza ◽  
Khan ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Cement Mortar ◽  
Bond Formation ◽  
Maximum Level ◽  
Brick Masonry ◽  
Masonry Structures ◽  
Strength Tests ◽  
The Relationship ◽  
Interface Behaviour ◽  
Selection Of

This research intends to explore the sustainable masonry bond formation and interface behaviour of brick masonry bonds with different cement mortar ratios. To test the sustainable behaviour of different brick bonds, different tests were applied to evaluate the performance of the developed five brick masonry structures with the help of four mortar ratios. Following that pattern, the methodologies of a prism triplet test, a bond wrench test, a shear bond test and strength tests for brick masonry were applied. The prism triplet test explained the bonding behaviour of mortar by producing a maximum strength (0.21 MPa) with a 1:3 mix ratio, and the minimum strength (0.095 MPa) with a 1:8 mix ratio. The bond wrench test showed a bond strength of maximum 0.0685 MPa with a mortar ratio of 1:3 and a minimum of 0.035 MPa with a mortar ratio of 1:8. The strength tests for masonry structures expressed that compressive strength (0.786 MPa) and flexural strength (0.352 MPa) were found to be at maximum level with a mortar ratio (1:3) with an English bond formation. For predictions of compressive and flexural strength, artificial neural networks (ANNs) were deployed, and successful predictions of these values along with the relationships between different properties of the material, mortar combinations and bond combinations are presented to complete the exploration of the relationship. This pattern can be helpful for the selection of sustainable brick masonry formations for housing development.

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