000013184 001__ 13184
000013184 005__ 20161114160330.0
000013184 04107 $$aeng
000013184 046__ $$k2009-06-22
000013184 100__ $$aThermou G., E.
000013184 24500 $$aRetrofit yield spectra for the seismic upgrading of existing rc buildings

000013184 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013184 260__ $$bNational Technical University of Athens, 2009
000013184 506__ $$arestricted
000013184 520__ $$2eng$$aIn the present paper, a new type of spectra, the Retrofit Yield Spectra (RYS), which provide direct insight into the implications effected by the selection of the design parameters on the definition of demand in terms of spectral acceleration and displacement at yield, is developed. The proposed methodology is based on predetermined controlled changes of the lateral response shape of vibration of the structure designed to eliminate localization of damage along the height of the building. To this end, a target response shape is selected depending on the type of the structural system and the identified deficiencies of the existing building. The target interstorey drift is achieved with a weighted distribution of added stiffness along the height of the building. Design of the seismic upgrading is performed in the elastic region, where stiffness is proportional to the flexural strength of reinforced concrete members. Thus, modification of stiffness is also accompanied by a commensurate change in the strength at yielding of the structural system.The Retrofit Yield Spectra (RYS) are inelastic design spectra on which curves that describe alternative retrofit scenarios have been superimposed. Depending on whether demand is expressed in terms of spectral acceleration, spectral displacement or interstory drift at yield of the first storey three alternative types are defined. For each retrofit scenario there is direct interrelation between demand in terms of spectral ordinates and design parameters. Derivation of the Retrofit Yield Spectra (RYS) is implemented in the casestudy of a RC building tested in full scale in order to examine the effectiveness of the proposed methodology.

000013184 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013184 653__ $$aRetrofit, Spectra, Seismic upgrading, RC jacketing. Abstract. In the present paper, a new type of spectra, the Retrofit Yield Spectra (RYS), which provide direct insight into the implications effected by the selection of the design parameters on the definition of demand in terms of spectral acceleration and displacement at yield, is developed. The proposed methodology is based on predetermined controlled changes of the lateral response shape of vibration of the structure designed to eliminate localization of damage along the height of the building. To this end, a target response shape is selected depending on the type of the structural system and the identified deficiencies of the existing building. The target interstorey drift is achieved with a weighted distribution of added stiffness along the height of the building. Design of the seismic upgrading is performed in the elastic region, where stiffness is proportional to the flexural strength of reinforced concrete members. Thus, modification of stiffness is also accompanied by a commensurate change in the strength at yielding of the structural system.The Retrofit Yield Spectra (RYS) are inelastic design spectra on which curves that describe alternative retrofit scenarios have been superimposed. Depending on whether demand is expressed in terms of spectral acceleration, spectral displacement or interstory drift at yield of the first storey three alternative types are defined. For each retrofit scenario there is direct interrelation between demand in terms of spectral ordinates and design parameters. Derivation of the Retrofit Yield Spectra (RYS) is implemented in the casestudy of a RC building tested in full scale in order to examine the effectiveness of the proposed methodology.

000013184 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013184 720__ $$aThermou G., E.$$iPantazopoulou S., J.$$iElnashai A., S.
000013184 8560_ $$ffischerc@itam.cas.cz
000013184 8564_ $$s431765$$uhttp://invenio.itam.cas.cz/record/13184/files/CD248.pdf$$yOriginal version of the author's contribution as presented on CD, section: Repair and retrofit of structures.
000013184 962__ $$r13074
000013184 980__ $$aPAPER