A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A DISPLACEMENT-BASED ADAPTIVE PUSHOVER FOR ASSESSMENT OF BUILDINGS AND BRIDGES
Abstract Estimating seismic demands on structures requires consideration of inelastic behaviour: to this end, the use of nonlinear static pushover analyses, is inevitably going to be favoured over complex, impractical nonlinear time history methods. Currently employed pushover methods subject the structure to monotonically increasing lateral forces with invariant distribution until a target displacement is reached, based on the assumption that the response is controlled by the fundamental mode, unchanged after the structure yields. However, these invariant force distributions neither account for the contributions of higher modes to response, nor for the redistribution of inertia forces due to structural yielding and associated changes in vibration properties. To overcome drawbacks arising from conventional methods, an innovative displacementbased adaptive pushover technique for estimation of the seismic capacity of RC structures is illustrated. Analytical parametric studies on a suite of continuous multi-span bridges and framed buildings show that the novel approach can lead to the attainment of significantly improved predictions, which match very closely results from dynamic nonlinear analysis.
A DISPLACEMENT-BASED ADAPTIVE PUSHOVER FOR ASSESSMENT OF BUILDINGS AND BRIDGES
Abstract Estimating seismic demands on structures requires consideration of inelastic behaviour: to this end, the use of nonlinear static pushover analyses, is inevitably going to be favoured over complex, impractical nonlinear time history methods. Currently employed pushover methods subject the structure to monotonically increasing lateral forces with invariant distribution until a target displacement is reached, based on the assumption that the response is controlled by the fundamental mode, unchanged after the structure yields. However, these invariant force distributions neither account for the contributions of higher modes to response, nor for the redistribution of inertia forces due to structural yielding and associated changes in vibration properties. To overcome drawbacks arising from conventional methods, an innovative displacementbased adaptive pushover technique for estimation of the seismic capacity of RC structures is illustrated. Analytical parametric studies on a suite of continuous multi-span bridges and framed buildings show that the novel approach can lead to the attainment of significantly improved predictions, which match very closely results from dynamic nonlinear analysis.
A DISPLACEMENT-BASED ADAPTIVE PUSHOVER FOR ASSESSMENT OF BUILDINGS AND BRIDGES
PINHO, RUI (author) / ANTONIOU, STELIOS (author) / CASAROTTI, CHIARA (author) / LÓPEZ, MANUEL (author)
2006-01-01
16 pages
Article/Chapter (Book)
Electronic Resource
English
A DISPLACEMENT-BASED ADAPTIVE PUSHOVER FOR ASSESSMENT OF BUILDINGS AND BRIDGES
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