Abstract
Estimating seismic demands on structures requires explicit consideration of the structural inelastic behaviour: to this end, the use of nonlinear static procedures, or pushover analyses, is inevitably going to be favoured over more complex nonlinear time-history analysis methods. Currently employed pushover methods are performed subjecting the structure to monotonically increasing lateral forces with invariant distribution until a target displacement is reached, basing both the force distribution and target displacement on the assumptions that the response is controlled by the fundamental mode, unchanged after the structure yields. However, these invariant force distributions cannot account for the contributions of higher modes to response, nor for the redistribution of inertia forces because of structural yielding and the associated changes in the vibration properties: in order to overcome drawbacks arising from conventional methods; an innovative displacement-based adaptive pushover technique for estimation of the seismic capacity of RC structures is illustrated. Analytical parametric studies show that, with respect to conventional pushover methods, the novel approach can lead to the attainment of significantly improved predictions, which match very closely results from dynamic nonlinear analysis.
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Pinho, R. (2007). Using Pushover Analysis for Assessment of Buildings and Bridges. In: Pecker, A. (eds) Advanced Earthquake Engineering Analysis. CISM International Centre for Mechanical Sciences, vol 494. Springer, Vienna. https://doi.org/10.1007/978-3-211-74214-3_6
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DOI: https://doi.org/10.1007/978-3-211-74214-3_6
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