EXAMPLE 6. BUILDING VALUATION & REDESIGN STUDY

EXAMPLE 6: "STUDY FOR THE VALUATION AND REDESIGN OF A BUILDING ACCORDING TO THE CANC. 50 3 h revision of the 2022 EIA. In the new EIA, more seismic hazard categories are introduced (9 in total from 2 before), the term seismic class is introduced, as well as a new method of assessment and redesign (which can be followed as an alternative to the one in force until now). Seismic class is the maximum rating or redesign target for a given level of performance. It is derived from the combination of performance level and αg rate. The seismic classes for performance level B are considered as basic seismic classes. Based on the above table we can summarize that my level of performance determines m, q (elastic) and θu (inelastic) and my return period and exceedance probability determines the seismic acceleration αg. The three valuation targets (or the three seismic classes) for a 10% earthquake are still called A1, B1, C1 and have a factor of one but the targets for a 50% earthquake are now called A3+, B3+, C3+ and have a factor of 0.45 (from 0.53 previously). Still the two basic seismic hazard categories are no longer 10% and 50% but 10% with a factor of 1 and 30% with a factor of 0.60 (the two lines in bold in the table). In the parameters of the 5 scenarios related to EIS there is now a new field for the ground acceleration that will be calculated and used based on the above table.