Influence of stress relief due to deep excavation on a brick masonry wall: 3D numerical predictions

2021 ◽  
pp. 1-24
Author(s):  
Mukhtiar Ali Soomro ◽  
Dildar Ali Mangnejo ◽  
Abdullah Saand ◽  
Naeem Mangi ◽  
Muhammad Auchar Zardari
Keyword(s):  
Stress Relief ◽  
Masonry Wall ◽  
Brick Masonry ◽  
Deep Excavation ◽  
Numerical Predictions

Influence of Sulphate on the Moisture Movement of Calcium Silicate Brick Masonry Wall

2010 ◽  
Vol 133-134 ◽  
pp. 201-204
Author(s):  
Ibrahim Mohamad H. Wan ◽  
B.H. Abu Bakar ◽  
M.A. Megat Johari ◽  
P.J. Ramadhansyah
Keyword(s):  
Relative Humidity ◽  
Calcium Silicate ◽  
Masonry Wall ◽  
Sodium Sulphate ◽  
Brick Masonry ◽  
Masonry Walls ◽  
Moisture Movement ◽  
Moisture Expansion ◽  
Curing Period ◽  
Wet Condition

This paper presents the behaviour of moisture movement of calcium silicate brick masonry walls exposed to sodium sulphate environment. The walls were exposed to three sodium sulphate conditions with sulphate concentrations of5%, 10% and 15%. For comparison, some walls were also exposed to dry and wet condition which acts as a control conditions. All specimens were prepared and cured under polythene sheet for 14 days in a controlled environmental room and maintained at relative humidity and temperature of 80 ± 5% and 25 ± 2°C, respectively. After the curing period, the specimens were exposed to sodium sulphate as well as drying and water exposures, during which moisture movement was measured and monitored for a period of up to 7 months. As a result, the moisture expansion was observed and recorded for all masonry wall specimens after exposed to the sulphate condition.

scholarly journals Research on Damage Characteristics of Brick Masonry under Explosion Load

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Jifeng Wei ◽  
Zhixin Du ◽  
Yonghui Zheng ◽  
Oundavong Ounhueane
Keyword(s):  
Power Function ◽  
Explosive Charge ◽  
Masonry Wall ◽  
Pressure Vessels ◽  
Brick Masonry ◽  
Ejection Velocity ◽  
Load Bearing ◽  
Damage Characteristics ◽  
Explosion Load ◽  
The Relationship

As the main structural component of partition wall or load-bearing wall, brick masonry has been widely used in construction engineering. However, brick and mortar are all brittle materials prone to crack. Nowadays, fireworks, gas stoves, high-pressure vessels, and other military explosives may explode to damage nearby structures. Many explosion casualties had shown that the load-bearing capacity of brick masonry decreased dramatically and cracks or fragments appeared. Previous studies mainly focused on noncontact explosion in which shock wave is the main damage element. In fact, the response and damage effect of brick masonry wall under contact explosion are more complex, which attracts more attention now. In order to explore the damage characteristics of brick masonry under explosion load, a series of simulations and verification experiments are conducted. RHT and MO granular material models are introduced to describe the behaviour of brick and masonry, respectively, in simulation. The combination effect of front compressive wave and back tensile wave are main factors influencing the breakage of masonry wall. The experimental results are well in accordance with the simulation results. The front cross section dimension of crater is closely related to the radius of spherical explosive charge. A power function predictive model is developed to express the relationship between the radius of hole and the radius of explosive. Furthermore, with increasing the quantity of explosive charge, the number and ejection velocity of fragments are all increased. The relationship between maximum ejection velocity and the quantity of explosive also can be expressed as a power function model.

Experimental study on seismic performance of fire-exposed perforated brick masonry wall

2018 ◽  
Vol 180 ◽  
pp. 77-91 ◽  
Author(s):  
Jin Zhang ◽  
Hao Ma ◽  
Cheng Li ◽  
Qingfeng Xu ◽  
Weibin Li
Keyword(s):  
Experimental Study ◽  
Seismic Performance ◽  
Masonry Wall ◽  
Brick Masonry

scholarly journals An evaluation of mechanical properties of clay brick for masonry wall in Indonesia

2018 ◽  
Vol 215 ◽  
pp. 01034 ◽  
Author(s):  
Muhammad Ridwan ◽  
Ruddy Kurniawan ◽  
Agus
Keyword(s):  
Mechanical Properties ◽  
High Intensity ◽  
Masonry Wall ◽  
Masonry Structure ◽  
Brick Masonry ◽  
Clay Brick ◽  
Primary Material ◽  
Wooden Structure ◽  
Main Component ◽  
Main Construction

In principle, the main construction of the non-engineered building in Indonesia is the wooden structure. It can be seen from traditional houses in Indonesia. However, In the last two centuries, the use of brick masonry as wall component has been becoming the primary material. Another side, some places in Indonesia are the seismic areas and earthquake-prone areas. Learning from the earthquake that has happened in the last ten years, the building that used clay brick for masonry wall mostly suffered damage and destruction when subjected to a relatively high intensity of the earthquake. This paper used data from several places and some references. There have significant differences in the mechanical properties of the bricks. Generally, Indonesian bricks masonry have limited capability and substantial differences in the mechanical properties when compared to another country bricks. By the considering, the Indonesian bricks masonry that has low mechanical properties, so that it is proposed to use brick masonry to non-seismic only. It should be considered to use clay brick as the main component of the wall for a particular region in Indonesia. Next, the zoning of allowed masonry structure in Indonesia is proposed.

scholarly journals Experimental and Numerical Study of Behaviour of Reinforced Masonry Walls with NSM CFRP Strips Subjected to Combined Loads

Buildings ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 103
Author(s):  
Houria Hernoune ◽  
Benchaa Benabed ◽  
Antonios Kanellopoulos ◽  
Alaa Hussein Al-Zuhairi ◽  
Abdelhamid Guettala
Keyword(s):  
Failure Modes ◽  
Numerical Study ◽  
Masonry Wall ◽  
Brick Masonry ◽  
Masonry Walls ◽  
Near Surface ◽  
Combined Loads ◽  
Reinforced Masonry ◽  
Brick And Mortar ◽  
Near Surface Mounted

Near surface mounted (NSM) carbon fibers reinforced polymer (CFRP) reinforcement is one of the techniques for reinforcing masonry structures and is considered to provide significant advantages. This paper is composed of two parts. The first part presents the experimental study of brick masonry walls reinforced with NSM CFRP strips under combined shear-compression loads. Masonry walls have been tested under vertical compression, with different bed joint orientations 90° and 45° relative to the loading direction. Different reinforcement orientations were used including vertical, horizontal, and a combination of both sides of the wall. The second part of this paper comprises a numerical analysis of unreinforced brick masonry (URM) walls using the detailed micro-modelling approach (DMM) by means of ABAQUS software. In this analysis, the non-linearity behavior of brick and mortar was simulated using the concrete damaged plasticity (CDP) constitutive laws. The results proved that the application of the NSM-CFRP strips on the masonry wall influences significantly strength, ductility, and post-peak behavior, as well as changing the failure modes. The adopted DMM model provides a good interface to predict the post peak behavior and failure mode of unreinforced brick masonry walls.

Mechanical Analysis of the Recycled Concrete Brick Masonry Wall under In-Plane Load

2011 ◽  
Vol 250-253 ◽  
pp. 278-282 ◽  
Author(s):  
Song Gu ◽  
Guo Ping Chen ◽  
Shui Wen Zhu
Keyword(s):  
Finite Element ◽  
Mechanical Analysis ◽  
Masonry Wall ◽  
Brick Masonry ◽  
Recycled Concrete ◽  
Masonry Walls ◽  
Fe Model ◽  
Element Analysis ◽  
Finite Element Software ◽  
Strength Capacity

The purpose of this paper was to investigate the mechanical behavior and failure mode of recycled concrete brick masonry wall under cycling in-plane load. These models of masonry walls were constructed in the laboratory and experimented under in-plane cycling load. The masonry wall was made of recycled concrete bricks joined by mortar, with gypsum lining on both faces. A simulation based on the experiment was carried out using the finite element software ANSYS. In the proposed FE model, the recycling concrete bricks and joints were modeled separately, allowing for nonlinear deformation characteristics of the two materials. The results of the experiment and the finite element analysis were analyzed and compared. When the stress distributions were taken into consideration in the experiments and solutions of ANSYS, it was observed that the stress concentration occurred on two diagonals of the masonry wall. The destruction process and characteristics of the masonry wall were obtained by the experiments. The results of finite element method matched experimental results very well. The FE software ANSYS can be used in the analysis of recycling concrete brick masonry walls under in-plane cycling load and strength capacity.

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.

scholarly journals Assessing the Effect of Different Mortar Mixes on Strength of Burnt Clay Brick Masonry Wall

2020 ◽  
Vol V9 (05) ◽  
Author(s):  
Owino Stephen ◽  
Dr. Kyakula Michael ◽  
Dr. Mugume Rodgers Bangi ◽  
Keyword(s):  
Masonry Wall ◽  
Brick Masonry ◽  
Clay Brick ◽  
Burnt Clay

scholarly journals Flexural Strength of Fly ash Brick Masonry Wall with four different bond

2021 ◽  
Vol 2070 (1) ◽  
pp. 012190
Author(s):  
S Shenbagavalli ◽  
Ramesh Babu Chokkalingam
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Carrying Capacity ◽  
Masonry Wall ◽  
Crack Pattern ◽  
Brick Masonry ◽  
The Other ◽  
Masonry Walls ◽  
Load Carrying Capacity ◽  
Load Carrying

Abstract The strength of the masonry mainly depends on type of bond, types of bricks, compressive strength of the bricks and mortar used. The types of bonds play a major role in the properties of brick masonry wall. The most common types of bond used in practice are English bond, Flemish bond, Stretcher bond and Header bond. A lot of study has been performed on the load-carrying capacity of masonry walls. In this paper, effort has been taken to study the influence of different bonds on the flexural strength of the flyash brick masonry wall. For this wall of size 1m × 0.76m × 0.22m has been casted, cured for 28 days and tested in a loading frame. From the results, it was found the English bond gave higher flexural strength compared to other bonds such as Flemish, Stretcher and Header bond. The flexural strength of English bond was around 45 to 50% higher than the other bonds. The crack pattern at failure was also noted for all the masonry walls.

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