Blast Resistant Design

Single Abstract

343678 - PERFORMANCE OF NANO-MODIFIED POLYMER CONCRETE (NMPC) WALLS IN PROTECTIVE STRUCTURES

Saturday, April 21
8:00 AM - 9:30 AM
Location: 202CD

Ultra-high performance concrete (UHPC) has extremely high compressive strength of about 20,000-30,000 psi (150-200 MPa). UHPC does not have sufficient ductility require for optimum performance of protective structures, which are usually subjected to large inelastic deformation unless steel fibers are introduced to the mix. However, it has been shown that incorporating steel fibers complicates the mixing process and disrupts UHPC production rate. Nano-modified polymer concrete (NMPC) has shown superior ductility (3% failure strain compared to 0.3% failure strain of normal concrete, appreciable tensile strength 1500 psi (10 MPa) and outstanding bond strength.

This study therefore focuses on the performance of such concrete walls under blast loading using a nonlinear finite element program, LS-DYNA, which has been used in different blast loading simulations, by choosing sufficient time steps, material constitutive models, and numerical integration technique. Hybrid composite concrete panels produced by interlocking elements made of UHPC and NMPC are studied. The numerical results obtained would be introduced in blast resistant design guides. The proposed concrete panels have never been proposed before and the key factors studied are wall thicknesses, charge weights, standoff distances, and the composite action of UHPC and NMC configurations across the wall.

Olaniyi Solomon Arowojolu

PhD Student
Civil Engineering Department, University of Idaho

Olaniyi Arowojolu is a Ph.D. student in the Department of Civil and Environmental Engineering at University of Idaho, Moscow. He received his Bachelor’s degree from the University of Lagos, Nigeria and Master’s degree from the King Fahd University of Petroleum and Minerals, Saudi Arabia.
His research interest includes development and improvement of concrete structures to withstand extreme loading and harsh environmental conditions.

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Ahmed Ibrahim

Assistant Professor,Department of Civil and Environmental Engineering
University of Idaho

Ahmed Ibrahim is an assistant professor in the Department of Civil & Environmental Engineering. He received his doctorate in civil/structural engineering from the University of Missouri–Columbia. His research involves blast resistant design, experimental testing and numerical analysis of structural elements, and the performance and strengthening of reinforced and prestressed concrete bridges. His research has been funded from many state DOTs and presented in several articles published in journals and conference proceedings. Ibrahim is registered as a professional engineer and his experience includes more than 12 years in industry and academia. His industrial experiences are mainly focused in structural analysis and design of buildings and bridges. He is a member of the American Society of Civil Engineers (ASCE) and the American Concrete Institute (ACI).

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Mahmoud R. Taha

Professor and Chair
Department of Civil Engineering, University of New Mexico

n/a

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343678 - PERFORMANCE OF NANO-MODIFIED POLYMER CONCRETE (NMPC) WALLS IN PROTECTIVE STRUCTURES



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