Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Blast Vulnerability Evaluation of Concrete Masonry Unit Infill Walls Retrofitted with Nano Particle Reinforced Polyurea: Modelling and Parametric Evaluation
This paper focuses on blast vulnerability assessment of concrete masonry infill walls retrofitted with nano particle reinforced polyurea. Quarter scale model concrete masonry infill walls made of scaled down brick units were retrofitted with Polyhedral Oligomeric Silsesquioxane (POSS) reinforced polyurea and subjected to a pre-adjusted airblast pressure and impulse in the ERDC Blast Load Simulator facility. A computationally-efficient model was built using an explicit hydrocode called ANSYS AUTODYN to replicate with reasonable accuracy the behavior of retrofitted infill walls subjected to blast loads. A series of finite element analysis was conducted. The focus was to study the effect of some factors such as boundary conditions, thickness and arrangement of retrofitted layers, and ductility of retrofitted materials on the behavior of the system during and after blast. Results from blast experiments showed that POSS reinforced polyurea significantly enhanced the performance of masonry walls sustaining blast load. The finite element parametric evaluation results show that for the case of retrofitting with elastomeric materials it is better to apply the retrofit at the back side since this will be associated with no failure, when compared to front side retrofit, and a larger deflection (e.g. more energy dissipation) when compared with two side retrofit with a smaller amount of material.
Blast Vulnerability Evaluation of Concrete Masonry Unit Infill Walls Retrofitted with Nano Particle Reinforced Polyurea: Modelling and Parametric Evaluation
This paper focuses on blast vulnerability assessment of concrete masonry infill walls retrofitted with nano particle reinforced polyurea. Quarter scale model concrete masonry infill walls made of scaled down brick units were retrofitted with Polyhedral Oligomeric Silsesquioxane (POSS) reinforced polyurea and subjected to a pre-adjusted airblast pressure and impulse in the ERDC Blast Load Simulator facility. A computationally-efficient model was built using an explicit hydrocode called ANSYS AUTODYN to replicate with reasonable accuracy the behavior of retrofitted infill walls subjected to blast loads. A series of finite element analysis was conducted. The focus was to study the effect of some factors such as boundary conditions, thickness and arrangement of retrofitted layers, and ductility of retrofitted materials on the behavior of the system during and after blast. Results from blast experiments showed that POSS reinforced polyurea significantly enhanced the performance of masonry walls sustaining blast load. The finite element parametric evaluation results show that for the case of retrofitting with elastomeric materials it is better to apply the retrofit at the back side since this will be associated with no failure, when compared to front side retrofit, and a larger deflection (e.g. more energy dissipation) when compared with two side retrofit with a smaller amount of material.
Blast Vulnerability Evaluation of Concrete Masonry Unit Infill Walls Retrofitted with Nano Particle Reinforced Polyurea: Modelling and Parametric Evaluation
Irshidat, M. (Autor:in) / Al-Ostaz, A. (Autor:in) / Cheng, A. H. -D. (Autor:in) / Mullen, C. (Autor:in)
Structures Congress 2011 ; 2011 ; Las Vegas, Nevada, United States
Structures Congress 2011 ; 2126-2141
13.04.2011
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
| British Library Conference Proceedings | 2011
Blast response of polymer-retrofitted masonry unit walls
| British Library Online Contents | 2017