Dynamic and static collapse tests of reinforced-concrete columns

An accurate and computationally efficient three dimensional nonlinear model for the analysis of large-scale RC structures subjected to cyclic and dynamic loading conditions

“…The obtained results indicate that the numerically predicted displacements are in a good agreement with the experimental data (Fig. 9.33), while during the final stages of the numerical experiment (t > 24 s) the model exhibited high damages at the base of the frame, resulting into larger deformations in comparison to the experiment test [207]. This can be attributed to the highly nonlinear response after the development of significant cracking and spalling at the base of the structures.…”

“…9.32, was selected to further study the efficiency of the proposed algorithm. The RC space frame denoted as frame W050, was investigated by Minowa et al [207]. The RC frame consists of four columns, which were fixed on a shake table at their lowerend and monolithically connected to a steel rigid slab at the top.…”

“…The imposed acceleration record at its base is illustrated in Fig. 9.33, where after the 15 th second, the structure undergoes accelerations that increase through time, forcing the frame to develop a significant nonlinear behavior [207]. Thus, the numerical results that will be presented herein will therefore concentrate on the dynamic behavior of the structure after the 15 th second of the dynamic excitation.…”

“…9.32 W050 RC frame. Geometric details [207] and FE mesh with solid and beam finite elements. For the steel slab and the additional mass applied at the top of the specimen, 126 hexahedral elements were used to construct the mesh.…”

“…It is important to state at this point that the experiment [207] reported significant damages at the columns leading to an actual collapse of the structure. This indicates that the experimental measurements beyond the 24 th second of the dynamic excitation could be hindered by a lack of accuracy given the significant nonlinearities that led to the instability of the frame and subsequently to the development of very large deformations.…”