Abstract
This paper deals with the analysis of the inelastic response of buildings originally damaged by earthquakes and subjected to earthquake aftershock and wind loading. The overall aim is to establish the effect of wind actions on structural stability. To that end, one four-story bare frame benchmarked by the European Laboratory for Structural Assessment, is subject to various levels of winds and earthquake joint load while monitoring changes on the ductility demand. In this paper is shown that the combined action of strong winds and earthquakes, however its low probability of occurrence, would cause a decrease of strength reduction factors and considerably increase the ductility demand of damaged infrastructure hence inducing additional risks that would otherwise remain unquantified. The paper examines the non-linear performance of Multi-degree of freedom systems subject to various levels of winds and earthquake load and deals with the estimation of strength reduction factors. This is a relatively unexplored area of research which builds on past developments whereby inelastic performance of buildings has been discussed. It also links to various other paths of development such as structural reliability, forensic and control systems engineering. Doi: 10.28991/cej-2021-03091675 Full Text: PDF
Highlights
Most structures designed according to current code provisions will sustain damage in the event of a design-level earthquake occurrence, which to a good extent, is expected
Rμ is a function of the period of vibration T of structure, the damping the type of hysteretic behavior and the level of inelastic deformation studies reviewed in the previous section agree that for a given acceleration time history the strength reduction factor is primarily influenced by the period of vibration
This study presents ductility demands for Multi Degree Of Freedom (MDOF) systems under multiple near- and far-fault seismic ground motions
Summary
Most structures designed according to current code provisions will sustain damage in the event of a design-level earthquake occurrence, which to a good extent, is expected. It appears that new research avenues generate through consideration of near- or far-fault earthquake events followed by moderate to strong aftershocks that occur simultaneously to wind actions .This paper attempts to address this knowledge gap through the estimation of ductility demands (μ) of structures subject to the combined effect of earthquake and wind load. The latter, flowing at mean speeds ranging between 5 ms-1 and 50 ms-1. The latter, flowing at mean speeds ranging between 5 ms-1 and 50 ms-1 is conducted to obtain expressions for the ductility demands, in terms of the force reduction factor, and conclusions and recommendations are provided
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