Numerical Investigations of Different Seismic Retrofit Techniques for Flat-Slab Structures

Marco Valente

doi:10.4028/www.scientific.net/AMM.267.42

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Impact of Wind Generation in the Generation Reliability Assessment
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Assessment of Redundant Steel Structural Systems Considering Effects of Member Strength Variability on the System
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Numerical Investigations of Different Seismic Retrofit Techniques for Flat-Slab Structures
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Optimization of the Working Conditions of a Single Molten Carbonate Fuel Cell
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 267Numerical Investigations of Different Seismic...

Numerical Investigations of Different Seismic Retrofit Techniques for Flat-Slab Structures

Abstract:

The construction of reinforced concrete (RC) buildings with flat-slab systems has become widely used in some high seismicity European countries. This type of structure is particularly common both for office and residential buildings, taking advantage of the reduced floor height to meet economical and architectural demands. Even though some national codes may include rules for the design of these structures, the provisions of Eurocode 8 don’t cover flat-slab frames used as part of the lateral load resisting system. Main results of seismic analyses performed on a six-story RC flat-slab structure are reported in this study. The structural response was predicted using both nonlinear static and dynamic analyses with artificial ground motion records with increasing intensity levels. Different seismic retrofit techniques were applied to enhance the seismic performance of the structure including: 1) insertion of shear wall; 2) confinement of column plastic hinge regions using FRP wrapping; 3) addition of RC column jackets. The predicted seismic performance of the retrofitted models was compared to that of the unretrofitted counterpart. Numerical investigations provide information about the seismic performance of a common type of RC structure not covered by the provisions of Eurocode 8 as well as the potential to mitigate the damage for varying earthquake intensity levels through different retrofit techniques.