PARAMETRIC STUDIES OF RC SLABS RETROFITTED WITH FRP TO RESIST AIRBLAST LOADS

【Author】

Deric John Oehlers;

【Abstract】

<正>Current guidelines such as TM5 and ASCE for the design of unretrofitted structural members against airblast loading contain a number of inadequacies when applied to FRP retrofitted structural members.For example,these guidelines do not allow for the change in slope of the resistance function after the retrofitted section begins to yield.This is not a reasonable assumption because there are large gains in strength after the member has begun to yield due to the FRP plates being able to take additional load after the steel reinforcement has yielded.A dynamic response model which allows for both the increase in blast resistance due to plating and for varying strain rates with time as well as along the depth of the member,has already been developed and calibrated.This dynamic response model is used in a parametric study to optimise the retrofitting of reinforced concrete(RC) members subjected to airblast loading by considering retrofitting the tensile face,compressive face and both faces using various quantities and techniques of retrofitting.The effectiveness of the retrofitting methods is discussed.

【Keywords】

Dynamic response;;retrofitted technique;;optimized design;;parametric study

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