Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
PROTECTION OF MASONRY STRUCTURES AGAINST EXPLOSIONS APPLYING LAYERS OF TEXTILE REINFORCED MORTAR
The protection of masonry walls against blast-induced loads by using textile-reinforced mortar (TRM) is investigated herein. Typically the consequences to a structure from explosions (either intentional or accidental) may range from total or partial building collapse due to the direct release of energy to injuries and fatalities due to the created debris. Masonry elements are of stiff and brittle nature and demonstrate considerable resistance in medium-sized compressive loads but degrade dramatically for stronger loads and impacts under tensile stresses. TRM constitutes a novel composite, using open-mesh textiles made from fibre rovings, which has been proven effective as strengthening material to carry the tensile stresses of out-of-plane inertial loading, while satisfying the necessary compatibility, reversibility and durability requirements for masonry buildings. Retrofitting of existing structures with the use of TRM can substantially increase their strength and deformation capacity, providing a sufficient protection to the occupants from blast loads. It should be noted that improving the deformation capacity of masonry can increase the gravitational load bearing capacity of the structure and minimise second order phenomena during a blast event. In this work, we propose a numerical method to accurately predict the various structural effects of explosions on masonry. The focus is to evaluate the developed damage due to impulsive loads and investigate the enhancement of the global dynamic response of a masonry wall before and after retrofitting. Masonry consists of brick units surrounded by mortar joints. The brittle behaviour of this two-phase material is modelled in the EUROPLEXUS explicit finite element code for fast transient phenomena, in complex three-dimensional fluid-structure systems. The performance of masonry is described using plasticity laws for the constituent elements and damage for softening. Geometric non-linearity effects accounting for large displacements and large rotations are also considered. The numerical response is validated using out-of-plane experiments of masonry walletes.
PROTECTION OF MASONRY STRUCTURES AGAINST EXPLOSIONS APPLYING LAYERS OF TEXTILE REINFORCED MORTAR
The protection of masonry walls against blast-induced loads by using textile-reinforced mortar (TRM) is investigated herein. Typically the consequences to a structure from explosions (either intentional or accidental) may range from total or partial building collapse due to the direct release of energy to injuries and fatalities due to the created debris. Masonry elements are of stiff and brittle nature and demonstrate considerable resistance in medium-sized compressive loads but degrade dramatically for stronger loads and impacts under tensile stresses. TRM constitutes a novel composite, using open-mesh textiles made from fibre rovings, which has been proven effective as strengthening material to carry the tensile stresses of out-of-plane inertial loading, while satisfying the necessary compatibility, reversibility and durability requirements for masonry buildings. Retrofitting of existing structures with the use of TRM can substantially increase their strength and deformation capacity, providing a sufficient protection to the occupants from blast loads. It should be noted that improving the deformation capacity of masonry can increase the gravitational load bearing capacity of the structure and minimise second order phenomena during a blast event. In this work, we propose a numerical method to accurately predict the various structural effects of explosions on masonry. The focus is to evaluate the developed damage due to impulsive loads and investigate the enhancement of the global dynamic response of a masonry wall before and after retrofitting. Masonry consists of brick units surrounded by mortar joints. The brittle behaviour of this two-phase material is modelled in the EUROPLEXUS explicit finite element code for fast transient phenomena, in complex three-dimensional fluid-structure systems. The performance of masonry is described using plasticity laws for the constituent elements and damage for softening. Geometric non-linearity effects accounting for large displacements and large rotations are also considered. The numerical response is validated using out-of-plane experiments of masonry walletes.
PROTECTION OF MASONRY STRUCTURES AGAINST EXPLOSIONS APPLYING LAYERS OF TEXTILE REINFORCED MORTAR
Kouris, LAS (Autor:in) / Valsamos, G (Autor:in) / Triantafyllou, S (Autor:in) / Karlos, V (Autor:in) / Pohoryles, D (Autor:in) / Bournas, D (Autor:in) / Larcher, M (Autor:in) / Casadei, F (Autor:in)
23.11.2020
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
DDC:
690
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