Blast Response of Full-Size Concrete Walls with Chemically Reactive Enamel (CRE)-Coated Steel Reinforcement

Abstract

In this study, two full-size concrete walls were tested and analyzed to demonstrate the effectiveness of a chemically reactive enamel (CRE) coating in improving their mechanical behavior under blast loading: one with CRE-coated rebar and the other with uncoated rebar. Each wall was subjected in sequence to four explosive loads with equivalent 2, 4, 6-trinitrotoluene (TNT) charge weights of 1.82, 4.54, 13.6, and 20.4 kg. A finite element model of each wall under a close-in blast load was developed and validated with pressure and strain measurements, and used to predict rebar stresses and concrete surface strain distributions of the wall. The test results and visual inspections consistently indicated that, compared with the barrier wall with uncoated reinforcement, the wall with CRE-coated rebar has fewer concrete cracks on the front and back faces, more effective stress transfers from concrete to steel rebar, and stronger connections with its concrete base. The concrete surface strain distributions predicted by the model under various loading conditions are in good agreement with the crack patterns observed during the tests.

Department(s)

Civil, Architectural and Environmental Engineering

Second Department

Mining Engineering

Keywords and Phrases

Blast Loading; Bond Strength; Chemically Reactive Enamel (CRE) Coating; Crack Pattern; Finite Element Model; Bond Strength (Materials); Enamels; Explosives; Reinforcement; Strain; 2 ,4 ,6-Trinitrotoluene; Concrete Surface; Effective Stress; Loading Condition; Mechanical Behavior; Visual Inspection

International Standard Serial Number (ISSN)

1673-565X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2016 Zhejiang University, All rights reserved.

Publication Date

01 Sep 2016

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