000015590 001__ 15590
000015590 005__ 20161115135324.0
000015590 04107 $$aeng
000015590 046__ $$k2013-06-12
000015590 100__ $$aAntonopoulos, T.
000015590 24500 $$aImproving the Seismic Performance of Existing Old Pilotis Type Buildings By Strengthening Only the Ground Story

000015590 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015590 260__ $$bNational Technical University of Athens, 2013
000015590 506__ $$arestricted
000015590 520__ $$2eng$$aThe present paper deals with the problem of partial strengthening of old Reinforced Concrete (RC) buildings with open ground floors (pilotis). The strengthening is restricted to the ground level, so that the cost is kept to a minimum and the building remains in use during the intervention. Since strengthening of the ground story will typically transfer the problem to the story or stories above, it is necessary to determine the amount of required strengthening so that the net result will be an optimum, i.e. the maximum possible reduction of the building’s vulnerability. In essence the intervention is aimed at increasing the overall seismic resistance for the said class of buildings by removing the “soft story” weakness. This limited intervention is not generally expected to bring the building up to the standards of seismic safety implied by the new codes. For dealing with this problem, plane RC frames corresponding to symmetric buildings, as well as non-symmetric buildings in plan, representative of the old building stock in Greece, are designed in accordance with the old codes (RC code and Code for earthquake resistant design). Subsequently they are subjected to a set of code compatible accelerograms and using nonlinear time history analyses conclusions are drawn regarding the effectiveness of ground story strengthening. Evaluation of their seismic performance is based on Part-3 of Eurocode 8 for assessment and retrofitting of buildings. It is shown that strengthening only the open ground story can effectively reduce the vulnerability of pilotis type buildings by removing the inherent weakness. For non-symmetric buildings, appropriate selection of the bracing location and size, can also improve building performance by reducing the ground story stiffness eccentricity and the consequent torsional response.

000015590 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015590 653__ $$aReinforced concrete buildings, Open ground story, Inelastic earthquake response, Seismic evaluation, Seismic strengthening, Steel bracing.

000015590 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015590 720__ $$aAntonopoulos, T.$$iAnagnostopoulos, S.
000015590 8560_ $$ffischerc@itam.cas.cz
000015590 8564_ $$s1633206$$uhttps://invenio.itam.cas.cz/record/15590/files/1119.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-RS 19 REPAIR AND RETROFIT OF STRUCTURES
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000015590 962__ $$r15525
000015590 980__ $$aPAPER