000013163 001__ 13163
000013163 005__ 20161114160330.0
000013163 04107 $$aeng
000013163 046__ $$k2009-06-22
000013163 100__ $$aCelarec, D.
000013163 24500 $$aEstimation of the seismic risk with consideration of capacity degradation over time

000013163 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013163 260__ $$bNational Technical University of Athens, 2009
000013163 506__ $$arestricted
000013163 520__ $$2eng$$aThe dependence of mankind on the urban built environment is an integral part of culture that is so firmly embedded in our daily life that we are mostly unaware of its existence, as long as functionality is provided. The aging of our structures and the action of natural hazards, such as earthquakes, threaten the functionality of our urban environment and extraordinary expenditures are required to just maintain the status quo. Throughout the world, buildings are reaching the end of their useful life and develop new pathologies that increase their seismic risk, an effect that we aim to capture. In the paper, first, a methodology for structural performance assessment with consideration of capacity degradation over time is presented, utilizing IN2 analysis and an extension of the PEER probabilistic framework to rapidly achieve accurate estimates of limit-state exceedance probabilities of deteriorated structures. In the second part the methodology is applied to an example of a three-storey asymmetric reinforced concrete building. At this stage of the study only an influence of corrosion on longitudinal and transverse reinforcement of the structural elements is considered in the estimation of the seismic risk. The N2 method is used for seismic performance assessment of the structure. It is shown that the capacity in terms of the maximum base shear, as well as in terms of the maximum ground acceleration corresponding to limit states in the nonlinear range, is reduced over time, since the corrosion affects the capacity of both the beams and columns. Consequently, the expected frequency of violating life-safety or near-collapse limit states over the time interval increases in comparison to the typical case where the strength deterioration is neglected.

000013163 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013163 653__ $$acapacity degradation, corrosion, reinforced concrete, performance-based earthquake engineering, static pushover. Abstract. The dependence of mankind on the urban built environment is an integral part of culture that is so firmly embedded in our daily life that we are mostly unaware of its existence, as long as functionality is provided. The aging of our structures and the action of natural hazards, such as earthquakes, threaten the functionality of our urban environment and extraordinary expenditures are required to just maintain the status quo. Throughout the world, buildings are reaching the end of their useful life and develop new pathologies that increase their seismic risk, an effect that we aim to capture. In the paper, first, a methodology for structural performance assessment with consideration of capacity degradation over time is presented, utilizing IN2 analysis and an extension of the PEER probabilistic framework to rapidly achieve accurate estimates of limit-state exceedance probabilities of deteriorated structures. In the second part the methodology is applied to an example of a three-storey asymmetric reinforced concrete building. At this stage of the study only an influence of corrosion on longitudinal and transverse reinforcement of the structural elements is considered in the estimation of the seismic risk. The N2 method is used for seismic performance assessment of the structure. It is shown that the capacity in terms of the maximum base shear, as well as in terms of the maximum ground acceleration corresponding to limit states in the nonlinear range, is reduced over time, since the corrosion affects the capacity of both the beams and columns. Consequently, the expected frequency of violating life-safety or near-collapse limit states over the time interval increases in comparison to the typical case where the strength deterioration is neglected.

000013163 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013163 720__ $$aCelarec, D.$$iDolsek, M.$$iVamvatsikos, D.
000013163 8560_ $$ffischerc@itam.cas.cz
000013163 8564_ $$s342621$$uhttps://invenio.itam.cas.cz/record/13163/files/CD217.pdf$$yOriginal version of the author's contribution as presented on CD, section: Seismic safety assessment of structures - ii (MS).
000013163 962__ $$r13074
000013163 980__ $$aPAPER