Within the framework of better defining the protection level offered by the Eurocode 8 provisions, with respect to the cyclic behaviour of R/C shear walls, accurate and as simple as possible numerical models of the non-linear behaviour of shear walls are necessary to carry out a sufficient amount of parametric analyses. To assess the performance of a recent column fibre finite element some well documented experimental cyclic tests, performed on simple shear walls designed to comply with different ductility requirements, were numerically simulated. The element is based on Timoshenko’s beam theory and accounts for shear-flexure interaction, a feature which might be of some relevance for the problem at hand. Shear resistance is obtained by modelling the principal resisting mechanisms. Shear and flexural behaviour are related to each other by means of suitable kinematics assumptions. This element differs from standard fibre beam elements since the principal direction of the compressive stress (direction of the fibres) is rotated to account for the contribution to shear due to arch action. Results of the experimental-numerical comparison are given in terms of the hysteretic behaviour of the structure. The good agreement with the experimental results suggests that the element is suitable for future modelling of complete structural systems.
Numerical simulation of cyclic tests of R/C shear walls
MARTINELLI, LUCA
2002-01-01
Abstract
Within the framework of better defining the protection level offered by the Eurocode 8 provisions, with respect to the cyclic behaviour of R/C shear walls, accurate and as simple as possible numerical models of the non-linear behaviour of shear walls are necessary to carry out a sufficient amount of parametric analyses. To assess the performance of a recent column fibre finite element some well documented experimental cyclic tests, performed on simple shear walls designed to comply with different ductility requirements, were numerically simulated. The element is based on Timoshenko’s beam theory and accounts for shear-flexure interaction, a feature which might be of some relevance for the problem at hand. Shear resistance is obtained by modelling the principal resisting mechanisms. Shear and flexural behaviour are related to each other by means of suitable kinematics assumptions. This element differs from standard fibre beam elements since the principal direction of the compressive stress (direction of the fibres) is rotated to account for the contribution to shear due to arch action. Results of the experimental-numerical comparison are given in terms of the hysteretic behaviour of the structure. The good agreement with the experimental results suggests that the element is suitable for future modelling of complete structural systems.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
