Polyurea Coated and Plane Reinforced Concrete Panel Behavior under Blast Loading: Numerical Simulation to Experimental Results
Journal Title: Trends in Civil Engineering and its Architecture - Year 2018, Vol 1, Issue 4
Abstract
This research investigated the behavior of reduced scale standard reinforced concrete panels coated with various polyurea systems under blast loading. The blast mitigation performance of four coatings including two plain polyureas and two discrete fiber-reinforced polyurea (DFRP) systems was evaluated. Chopped E-glass fibers were discretely integrated in with the polyurea to develop a DFRP system. The addition of glass fiber to a polymer coating provides improved stiffness and strength to the composite system while the polyurea base material provides ductility according to a fiber length optimization study conducted by Carey and Myers (2011) [1]. Reduced scale panel blast testing was conducted. In addition, the finite element program LS-DYNA was used to model panel and coating response under blast loading. Several modeling solutions were undertaken and compared for concrete formulation. Winfrith concrete material, model and Surface Cap model, which are widely used to simulate the concrete behavior under dynamic loading, were examined. Modeling results were analyzed and compared to the experimental work to validate the conclusions. Research initiatives have been advanced to investigate new materials that can be used for blast mitigation, strengthening, or for general repair-retrofit applications. This research activity focused on assessing the effectiveness of various blast mitigation coating technologies to be used for enhancing the blast resistance of structural members. This study examined the behavior of reduced scale standard reinforced concrete (RC) panels coated with various polyurea systems under blast loading. The finite element program LS-DYNA was used to model panel impact resistance under blast loading using the explicit time integration in order to compare to the experimental work to validate the conclusions. The blast mitigation performance of four coatings including two plain polyureas and two discrete fiber-reinforced polyurea (DFRP) systems was assessed. Chopped E-glass fibers were discretely integrated in with the polyurea to develop a DFRP system. The addition of glass fiber to a polymer coating provides improved stiffness and strength to the composite system while the polyurea base material provides ductility [1]. This study builds on previous work investigating the blast mitigation performance of hybrid, plain, and steel fiber- reinforced concrete panels coated with various polyurea systems under blast loading [2]. The results of the blast testing revealed that the addition of plain polyurea or DFRP system on the tension side improved panel performance by containing spalling during a blast event. DFRP systems exhibited less bulging compared to the plain polyureas due to higher stiffness. Previously, the polyurea retrofit approach for blast mitigation and impact resistance was investigated by conducting testing on masonry walls [3-10], vehicle barriers [11,12], and reinforced concrete panels [12-14]. Polyurea coating exhibited ductile behavior and was effective at containing spalling and reducing fragmentation during either blast or impact testing. Other Studies examined the effectiveness of the system to provided added shear and flexural capacity [15].
Authors and Affiliations
Natalia L Carey, John J Myers, Domenico Asprone, Costantino Menna, Andrea Prota
Keywords
Related Articles
- EP ID EP605083
- DOI 10.32474/TCEIA.2018.01.000119
- Views 56
- Downloads 0
Improving Tectonic Geomorphology Analysis and Interpretation of River Mobility Utilizing LiDAR-derived DEMs
This study contributed a reliability of Light Detection and Ranging (LiDAR) techniques to investigate tectonic geomorphology analysis of river mobility with high resolution Digital Elevation Models (DEMs). This study int...
The Revival of a Traditional Engineering - New Trends in Geotechnical Engineering Research
Geotechnical engineering designs are always laid as the most fundamental and earliest phase of civil engineering projects. The birth of geotechnical engineering is very hard to define, but modern geotechnical engineering...
Ferrocement - A Versatile Light Weight Construction Material
Socio-economic factors have always influenced construction practices. Man has invariably attempted to compose materials that are not only cheap and easy to employ, but also strong and durable. In the last century cementi...
Structural Insulated Panels: State-of-the-Art
This article aims to review and illuminate the latest research conducted on structural insulated panels (SIP) together with the latest information of the current experiment carried out by the authors. The authors attempt...
Physico-Chemical Analysis and Modelling of Ground Water Quality Parameters Using Water Quality Index Method (WQI) and Principal Component Analysis (PCA)
Groundwater is one of the major sources of water. It is affected by a number of natural and anthropogenic factors. As groundwater use has increased, issue associated with the quality of groundwater resources have likewis...