Invited Speaker

Dr. Ricardo Castedo

Dr. Ricardo Castedo

Geological and Mining Department,
Universidad Politécnica de Madrid, Spain
Speech Title: Slabs Reinforced with Fiber Reinforced Polymers under Closing Explosions: Experimental and Numerical Features

Abstract: Numerical simulation of reinforced concrete (RC) slabs with the addition of an external reinforced polymer (FRP) have been developed and compared with full scale real tests. Eight tests were conducted, one as a validation test (scaled distance equal to 0.83 m/kg1/3), three at a scaled distance of 0.42 m/kg1/3, and three at 0.21 m/kg1/3. The size of the slabs was 4.4 x 1.46 m, with a span of 4 m, and a thickness of 15 cm. The slabs were built using concrete of class C25/30, and B500C reinforcing steel. The surface receiving the blast was reinforced with 10 mm mesh spaced 300 mm apart in both directions. However, on the opposite face, the reinforcement used was 12 mm spaced 150 mm in both directions. Two different external reinforcement have been used: carbon fibre reinforcement (CFRP) and E-glass fibre reinforcement (GFRP). In cases of shorter scaled distances, one of the tests had no extra reinforcement, while the other two tests were performed with each of the FRPs located on the face opposite to the blast. Numerical simulation was performed with LS-DYNA software. The study elements (concrete, steel, and reinforcement) have been simulated in a Lagrangian formulation with solid elements, beam elements and shells, respectively. Two concrete models have been used and compared: CSCM and RHT. As for the explosive, the CONWEP-based Load Blast Enhanced (LBE) card was used as well as Smooth Particle Hydrodynamics (SPH) to check the explosive shape effect. Reinforcement with CFRP resulted in a generally reduced damage area on both surfaces. All models show a good correlation with the test results when comparing them with different parameters.

Keywords: LS-DYNA, Full-scale, Reinforced concrete, LBE, SPH

Acknowledgements: The Centre for Industrial Technological Development (CDTI) funded the PICAEX project, a consortium between TAPUSA, MAPEI and FHECOR, with the collaboration of the Universidad Politécnica de Madrid. The authors would like to thank the staff of “La Marañosa” (INTA) for their support in the trials.

Biography: Dr. Ricardo Castedo is an Associate Professor in the Geological and Mining Department at the Universidad Politécnica de Madrid in Spain. Dr. Castedo´s research is mainly concentrated around three lines of research: Security and Defense; Earth Sciences and Rock Mechanics; Physics of Explosives and Mining. His expertise, in addition to field work, has been mainly of numerical simulation and numerical modeling. These works allow different professional collaborations with people from UK (University of Leeds), Canada (University of Windsor), Italy (Politecnico di Torino) and India (University of Kerala); and different companies and institutions like Mapei (Italy), Fhecor (Spain), CLOGIC DEFENSE LLCC (USA), etc. Since 2009, Dr Castedo’s research activities have been supported by national and international funding bodies with competitive research grants exceeding €1.5M in more than 30 projects; since 2014, he has supervised four doctoral students and many more MSc and BSc from different institutions. To date, his research results have been resulted in 40 journals, 7 books or books chapters, 39 conferences; also, he published journals, conferences, and books of educational innovation research. He is also a reviewer of more than 25 scientific journals.