Recent earthquake resistant design codes (e.g. Eurocode 8, last Italian seismic code) underline the importance of stiffness regularity in elevation for frame systems located in seismic areas. Large deviations from a continuous variation with height of stiffness are likely to induce poor and often dangerous structural response (Paulay and Priestley). New codes emphasize moreover the importance of limiting non-structural damage under a seismic action having a large probability of occurrence during the economic life of a building. Actually nonstructural components play a significant role in performance-based earthquake engineering. Damage limitation requirements consist in limiting interstorey drifts. Therefore, to evaluate and eventually redefine a new building's preliminary design, it seems very useful to have a method to quickly calculate lateral stiffness of each storey so as to quantify its variation along the height of the building as well as a simple procedure to estimate the maximum lateral drift demands. Two approximate methods will be proposed for achieving these purposes. © 2005 WIT Press.
|Titolo:||Methods for the evaluation of the damage limit state and stiffness regularity in elevation of frame systems in seismic areas|
|Data di pubblicazione:||2005|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|