Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Prediction of elastic modulus of masonry through sonic tests
Dissertação de mestrado em Structural Analysis of Monuments and Historical Construction ; The understanding of mechanical properties of historical masonry buildings is an important diagnostic process to evaluate their structural stability and conditions. Due to the requirement to maintain the authenticity for historical values and structural integrity, intrusive destructive tests are not recommended. Therefore, non-destructive tests (NDT) serve as a viable alternative, although in most cases, used as qualitative measures. The NDT includes thermography, sonic and radar tests. Among the NDT tests, sonic test stands out for most conservation efforts, mostly due to its simplicity and ease of use. In recent decades, studies on finding meaningful relationships between dynamic and static mechanical properties, especially in modulus of elasticity, Ed/Es, are important steps, although physical and mechanical properties of masonries may differ depending on the composition of mortars, units and arrangements morphology. The main objective of this thesis was to understand and verify sonic impact test capability to estimate the material properties of masonry as well as to compare the dynamic and static modulus of elasticities obtained. The variation of the dynamic modulus of elasticity, Ed, in damaged masonry is also intended to be assessed. To accomplish the objectives, a test campaign based on both sonic tests and uniaxial compression tests had been designed. Two masonry types, namely, brick and rubble stone masonries were considered. The brick masonry (English bond) specimens were constructed to reflect historical buildings built in Lisbon in the twentieth century and stone masonry specimens were constructed to represent typical limestone masonry used to build vaults at Yucatan churches, Mexico. Different measurement configurations were used in the sonic tests namely vertical indirect and diagonal direct measurements. The dynamic modulus of elasticity, Ed, was calculated from velocities obtained from sonic tests while ...
Prediction of elastic modulus of masonry through sonic tests
Dissertação de mestrado em Structural Analysis of Monuments and Historical Construction ; The understanding of mechanical properties of historical masonry buildings is an important diagnostic process to evaluate their structural stability and conditions. Due to the requirement to maintain the authenticity for historical values and structural integrity, intrusive destructive tests are not recommended. Therefore, non-destructive tests (NDT) serve as a viable alternative, although in most cases, used as qualitative measures. The NDT includes thermography, sonic and radar tests. Among the NDT tests, sonic test stands out for most conservation efforts, mostly due to its simplicity and ease of use. In recent decades, studies on finding meaningful relationships between dynamic and static mechanical properties, especially in modulus of elasticity, Ed/Es, are important steps, although physical and mechanical properties of masonries may differ depending on the composition of mortars, units and arrangements morphology. The main objective of this thesis was to understand and verify sonic impact test capability to estimate the material properties of masonry as well as to compare the dynamic and static modulus of elasticities obtained. The variation of the dynamic modulus of elasticity, Ed, in damaged masonry is also intended to be assessed. To accomplish the objectives, a test campaign based on both sonic tests and uniaxial compression tests had been designed. Two masonry types, namely, brick and rubble stone masonries were considered. The brick masonry (English bond) specimens were constructed to reflect historical buildings built in Lisbon in the twentieth century and stone masonry specimens were constructed to represent typical limestone masonry used to build vaults at Yucatan churches, Mexico. Different measurement configurations were used in the sonic tests namely vertical indirect and diagonal direct measurements. The dynamic modulus of elasticity, Ed, was calculated from velocities obtained from sonic tests while ...
Prediction of elastic modulus of masonry through sonic tests
Soon, Khei (Autor:in) / Vasconcelos, Graça / Ortega Heras, Javier
11.08.2021
203718739
Hochschulschrift
Elektronische Ressource
Englisch
DDC:
624
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