Dynamic Analysis of Reinforced Concrete Slabs: Comparison of Simplified Methods

strength and regular reinforced concrete have tested using a shock tube, and compared to quasi-statically .LV'-"'-t'-''U using the same device. Different failure modes have been according to concrete strength and loading rate. a first paper, the failure load and scheme are evaluated different..., ............ ..,_ .... _._ ........ , ..... methods: as a reference, French design code, equivalent single-degree-of-freedom (SDOF) oscillator, and a based on the yield lines theory which turns out to the most provided various possible failure mechanisms are Secondly, predicting the dynamic serviceability slabs is either using an analytical viscoelastic modal superposition, or an elasto- plastic SDOF oscillator equivalence. However, these methods are .......... ILLJL..,...,,...., to a homogeneous deformation stage the structure. necessity and requirements of refined analysis ............ ,., ...... ,,,, ...... .., 1199 1 tested reinforced concrete slabs Research significance to validate computational methods concrete structures ...... ...., ........... ...,...,, a model structure test has been defined, Toutlemonde et It consists in loading circular concrete slabs with a pressure step using a shock tube. Complete details of samples and boundary conditions Toutlemonde (1994). Ordinary (0) and high performances reinforced concrete (RC) slabs have been tested. One major result is possible onset of a shear failure mode, in competition with the global failure mode, Toutlemonde (1993), depending on concrete i.e. on the steel to concrete bond, and on the loading ....................... U.'V.L..L .... ..., & Rossi 994). changes in collapse mechanism of dynamically loaded structures have often been reported, e.g. for rectangular concrete slabs, Miyamoto et al. (1992), and for circular fiber-reinforced concrete slabs, Gambarova & Schumm (1994).