Shock-tested R. C. Slabs: Significant Parameters

by François Toutlemonde, Lab Central des Ponts et Chaussees, Paris, France,
Pierre Rossi, Lab Central des Ponts et Chaussees, Paris, France,

Document Type: Proceeding Paper

Part of: Structures Congress XII


Shock-tube tests of plain concrete and reinforced concrete (R. C.) slabs were performed. The influence of free water in concrete pores, emphasized in previous tests at a material level, is confirmed as controlling crack initiation in dynamics given the water/cement ratio of the concrete. At a structural level however, the global failure of the slab is governed by the block mechanism resulting of the crack development. The steel to concrete bond and the capacity of friction dissipation are significant parameters of this ultimate phase. Competition between bending and shear failure was observed, depending on concrete strength and loading rate.

Subject Headings: Reinforced concrete | Slabs | Concrete slabs | Material tests | Parameters (statistics) | Failure analysis | Material failures | Strength of materials

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