Upgrade of Structures with Srp and Cfrp Composites against Explosive Devices Placed Very near or in Contact with Rc Members

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چکیده

PROJECT NO. II.3 SUMMARY This project examines the feasibility of improving the blast-resistant capacity of reinforced concrete slabs by using innovative composite materials. In order to achieve this objective, five phases of testing were conceived. In the first phase of testing, four control reinforced concrete slabs were tested under real blast loads in order to establish a baseline for comparison for the other phases of testing. The explosive charge weight and stand-off distance required to impose a given damage level were predicted by using a modified displacement based methodology. Test results showed that the blast loads were effectively estimated using this method and the damage levels observed from the field tests correlated well with the predicted levels. In addition, test results corroborated that the blast-resistant capacity of RC slabs can be effectively increased by strengthening using composites. The main conclusion that can be drawn from these tests using explosives is that RC slabs retrofitted on both sides have a higher blast resistance capacity than those slabs retrofitted only on one side. This research summary discusses these experimental results along with the analysis steps used to predict the blast charge and standoff distance to impose a given damage level.

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تاریخ انتشار 2006