Effective framework for seismic analysis of cable-stayed-bridges,Part 2: Analysis' results

摘要

Referring to the article named "Effective framework for seismic analysis of ca cablestayedrnbridges, part.1" in which the studied structure and its modeling are discussed, in this secondrnpart one present the study of the values of the monitored parameters in a statistic way. Thisrnin an important aspect in order to evaluate if the number of the considered seismic events mayrnbe enough to obtain reliable results. The spatial variability of the ground motion is modelledrntaking into account a time delay of the displacements imposed at the interaction points structureterrain.rnThe displacements have been obtained from the integration of artificial generated accelerograms,rnspectra-compatible with the ones suggested by the Eurocode 8. The time delay betweenrnthe arrival of the seismic waves at the interaction points structure-terrain depends on thernpropagation velocity of the shear waves. It is been considered the structural response, with thernimposition of the same seismic event, under 10 different velocities of the shear waves, from 200rnm/s to 1000 m/s, with the purpose of studying eventual critical aspects of the structural response.rnThe structural response of the bridge is evaluated studying the time histories of 10rnmonitored parameters, kinematical and tensional.