Development of a seismic damage and loss scenario for contemporary and historical buildings in Thessaloniki, Greece

Seismic Vulnerability and Risk Assessment of Historic Masonry Buildings

“…Advanced uncertainty modelling and probability of occurrence of given phenomena is usually confined to the hazard component of the risk equations, while when probabilistic models are developed for vulnerability components, these usually relate to simplified modelling of the structure seismic response and assumption of pre-determined dispersion as might be found in literature [17,51]. Usually it is also assumed that fragility curves for different limit states can be obtained by using mean values of the performance point displacement and deriving lognormal distributions by either computing the associated standard deviation if some form of random sampling has been considered, or by assuming values of β from empirical distribution or literature.…”

“…This hypothesis is fairly acceptable, because in this direction buildings do not interact as strongly as in the other direction (façade walls). In this direction a very straightforward vulnerability assessment is attained for each building using the mechanical model in which the simplified bilinear capacity curve (SDOF system) is constructed for each building [51], limit states and the level of seismic action are defined, hence the performance point is retrieved through the capacity spectrum methodology (see [24]). Once the fragility curves for the four damage states are obtained, the evaluation of the probabilistic damage distribution is performed.…”

“…(b) If a building within the aggregate collapses before attaining the 70 % of the maximum shear value defined for the global push-over curve, it will drop of a value of the shear capacity of the building that prematurely failed. In this case, the equivalent stiffness is found by marking the secant to the unfailed push-over curve and the horizontal section is defined as each building in the aggregate under the defined seismic action, the displacement corresponding to the performance point can then evaluated the performance level of each building, by defining the damage threshold states, the values used for the damage state definition have been widely discussed in [51] and are based on expert judgment and for this case are defined as (Table 6):…”

Inventory of the building stock in the city of Serres (Greece) for seismic vulnerability assessment and loss estimation

“…Later versions have enhanced the hybrid procedure introducing the use of fragility curves [17,18], instead of DPMs, that have been derived for practically all building typologies that are present in the building stock of Greek cities. The first application of the enhanced procedure has been applied once again in Thessaloniki, within the framework of the Risk-UE project [19] where the building stock has been updated to include newer, with regards to the original database, buildings. Probably the most comprehensive application of the AUTh hybrid procedure has been applied to the cities of Grevena (Greece) and Düzce (Turkey) within the framework of the SRM-DGC project [20] and included the latest version of the fragility curves that will also be utilized in this study.…”

Seismic Vulnerability and Loss Assessment for Buildings in Greece

“…It is notable that the last 15 years have witnessed a growing interest in assessing the seismic vulnerability of European cities and the associated risk. Several earthquake damage (and loss) scenario studies appeared wherein some of the most advanced techniques have been applied to the urban habitat of European cities (Barbat et al 1996, Bard et al 1995, D'Ayala et al 1996, Dolce et al 2006, Erdik et al 2003, Faccioli et al 1999, 2008. A key feature of the most recent among these studies, including the one presented here for Thessaloniki, is the use of advanced GIS tools that permit clear representation of the expected distribution of damage in the studied area and visualisation of the effects of any risk mitigation strategy that can be adopted on the basis of the scenario.…”