LESSONS FROM RECENT EARTHQUAKES - FIELD MISSIONS OF GERMAN TASK FORCE

摘要

The paper gives an overview of the last field missions of the German TaskForce Group and presents exemplary results of the engineering analysis, which consists mainly of aftershock measurements, macroseismic studies and re-interpretation of earthquake damage. Furthermore it should contribute to assess the quality of available data collected during post-earthquake missions. The results shown in this paper mainly trace back to the field works conducted in Antofagasta (Chile, 1995), Cariaco (Venezuela, 1997) and Adana/Ceyhan (Turkey, 1998). The data of aftershock measurements is mainly used to evaluate local site amplification potential as well as to achieve detailed information about subsoil, such as predominant site frequencies. Macroseismic studies in urban areas, e. g. the performance of questionnaires, considering different building types and vulnerability classes as well as different damage grades and adopting the European Macroseismic Scale (EMS-92, EMS-98), were used for intensity evaluation and definition of vulnerability functions for different building types. The interpretation of a selected damage case is presented for the 1997 Cariaco (Venezuela) earthquake (07/09/97, M_s = 6.8), which stresses deficiencies in design and member detailing.