
Seyedmohammad Kahangi ShahrezaLund University | LU · Division of Structural Engineering
Seyedmohammad Kahangi Shahreza
Doctor of Engineering
Postdoctoral Fellow
About
17
Publications
1,510
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134
Citations
Introduction
Seyedmohammad does research in Structural Engineering and
Civil Engineering.
Skills and Expertise
Additional affiliations
April 2017 - May 2018
September 2016 - March 2017
Education
September 2013 - March 2016
September 2008 - June 2012
Publications
Publications (17)
Extruded mortar joints, resulting from suboptimal workmanship in bricklaying, bridge air gaps within cavity external walls. This phenomenon establishes a connection between brick masonry claddings and adjacent layers (such as insulation or weather-resistive barriers), inadvertently intensifying water penetration due to wind-driven rain (WDR) loads....
In Sweden, cavity walls constructed with autoclaved aerated concrete (AAC) inner leaves and clay brick outer leaves were a common design choice during the 1950s to 1970s. These walls often result in relatively extensive heat losses, leading to reduced indoor thermal comfort. Further, moisture-related issues like frost damage and interior dampness a...
Repointing is a prevalent maintenance practice in Northern Europe aimed at mitigating moisture-related damage in brick masonry buildings. Although commonly used, evidence of its effectiveness is limited. This study assesses repointing's role in reducing damage risks by conducting a probabilistic hygrothermal analysis of two wall types: timber frame...
Clay brick masonry façades are widely used because of their extended durability and aesthetic appeal. They also offer good protection against wind-driven rain (WDR), one of the most common moisture sources in Northern Europe. In clay brick masonry, WDR is associated with elevated water content and the possibility of water penetration, which may neg...
Mortar extrusion during bricklaying, resulting from suboptimal workmanship, may act as a bridge linking clay brick masonry claddings and adjacent layers (e.g., insulation or weather-resistant barriers), thereby, facilitating water penetration into the adjacent layer owing to wind-driven rain (WDR). Despite the significant effect of water penetratio...
This research study investigates the response of clay brick masonry with different crack widths before and after repointing subjected to water spray. In doing so, 3-course masonry prisms containing artificial cracks were exposed to a water spray during 23 hours of testing. Forty-nine cracked 3-course masonry prisms were prepared with a crack width...
The present paper investigates the impact of different water penetration criteria on the risk for damage in a common type of building envelope in Nordic countries, timber frame walls with brick masonry veneer. The studied walls are evaluated based on one damage criterion, the risk of mold growth. The study investigates several parameters: water pen...
Despite the impact of water penetration on the performance of building envelopes, no general agreement is available on implementing water penetration due to wind-driven rain (WDR) in hygrothermal and moisture safety analyses. This study proposes a novel criterion for water penetration in clay brick masonry that depends on the water content level of...
Clay brick masonry façades are commonly used due to their high-performance durability. However, exposure to climate agents such as wind-driven rain (WDR), freeze-thaw cycles, and wind abrasion cause deterioration of masonry façades over time. WDR as a significant source of moisture may contribute to the erosion of mortar joints and lead to increase...
In this study, we performed an experimental investigation of water absorption and penetration in clay brick masonry exposed to cyclic water spraying by employing a newly developed test setup. Several parameters, including brick absorption properties and different mortar joint profiles, were investigated. The specimens were exposed to a uniform wate...
This paper presents an experimental study carried out to investigate the behavior of concentrically loaded concrete columns confined with steel-reinforced polymer (SRP) jackets. Several parameters, i.e. size of the specimen, shape of the cross-section, number of layers, and density of steel fiber sheet are investigated. Axial and hoop strain contou...
This paper presents an investigation on the compressive behavior of plain concrete columns confined with steel-reinforced grout (SRG) composites. The test parameters include size and crosssectional shape (square or circular) of the columns, and number of layers (one or two) and density (low or medium density) of the steel fiber sheet. Out of 46 spe...
Use of clay brick masonry in façades is often motivated by its aesthetic values and durability. Yet, mortar joints exposed to climate agents erode over time, expected to cause elevated moisture content and water absorption. Thus, it is often recommended that 40- to 50-year-old facades should be repointed – a measure which is intrusive and costly. D...
Use of clay brick masonry in façades is often motivated by its aesthetic values and durability. Yet, mortar joints exposed to climate agents erode over time, expected to cause elevated moisture content and water absorption. Thus, it is often recommended that 40- to 50-year-old facades should be repointed – a measure which is intrusive and costly. D...
Fiber Reinforced Cementitious Matrix (FRCM) composite materials represent a recent strengthening technique, which can provide a complex scenario of different mechanical behaviors and failure mechanisms. The presented experimental study is aimed at improving the knowledge about the tensile and bond behavior of FRCMs with a focus, in particular, on t...
Strengthening and rehabilitation of existing masonry buildings is a topic that attracts the interest of the scientific community worldwide. Fiber reinforced polymer (FRP) composites have been largely employed for structural rehabilitation of masonry structures due to their ease of installation and their high strength-to-weight ratio, since the end...
Strengthening and rehabilitation of existing masonry buildings is a topic that attracts the interest of the scientific community worldwide. Fiber reinforced polymer (FRP) composites have been largely employed for structural rehabilitation of masonry structures due to their ease of installation and their high strength-to-weight ratio, since the end...
Questions
Questions (2)
I would like to know what is the best software to model water absorption of a brick masonry?
Which one of CFD or HAM theoretical aspects must be taken into account?
Actually, in our experimental campaign, masonry blocks built with three clay bricks are subjected to a rain episode and the amount of absorbed water after each test is measured. I would like to know it is possible to model this study and verify its result numerically?
Decision concerning the need for repointing is often based on general maintenance recommendations taking into account the time elapsed from erection, the previous repointing of the façade, or the presence of cracks and eroded mortar.
These recommendations are usually qualitative and do not prove the real need of Repointing. It would be great if there are any available literature concerning decision making on Repointing based on quantitative parameters such as degree of erosion, size and type of cracks, deterioration of hygro-thermal performance and etc.
Thanks in advance.