Experimental and numerical study on steel wire mesh reinforced concrete slab under contact explosion.pdfVIP

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Experimental and numerical study on steel wire mesh reinforced concrete slab under contact explosion.pdf

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Experimental and numerical study on steel wire mesh reinforced concrete slab under contact explosion.pdf

Materials and Design 116 (2017) 77–91 Contents lists available at ScienceDirect Materials and Design journal homepage: /locate/matdes Experimental and numerical study on steel wire mesh reinforced concrete slab under contact explosion Jun Li a,?, Chengqing Wu a, Hong Hao b, Yu Su a a Centre for Built Infrastructure Research, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia b Department of Civil Engineering, Curtin University, WA 6845, Australia HIGHLIGHTS ? Beam reinforced by steel wire mesh and micro steel ?bres shows high ?exure capability ? Slab with steel wire mesh reinforcement develops local membrane effect under blast ? FE-SPH algorithm can model the fragmentation process with reasonable accuracy ? The contact detonation generates fragments with velocity exceeding 100 m/s ? The blast shock front velocity detected in the ?eld test exceeds 700 m/s GRAPHICAL ABSTRACT article info Article history: Received 27 July 2016 Received in revised form 24 November 2016 Accepted 26 November 2016 Available online 5 December 2016 Keywords: Steel wire mesh Composite slab Contact detonation SPH algorithm abstract With the rising of terrorism and rapid urbanization around the world, increasingly more structures are exposed to the threats from accidental and hostile explosion loads. To provide adequate structural protection against blast load, novel materials and strengthening techniques are under fast development. In the present study, a composite slab design aiming at high level blast resistance is studied. In the matrix of high strength self-compacting concrete, besides conventional rebars serving as primary reinforcement, steel wire meshes are embedded and served as secondary reinforcements. Moreover, on the concrete cover layer where the tensile cracks locate, steel ?bres are added to provide micro crack-bridging effect. Preliminary numerical simulations adopting coupled Finite Element (FE) and Smoothed Particle Hydrodynami