SEISMIC MICROZONATION – PRINCIPLES, METHODS, APPLICATIONS AND ITS CONDITION IN SLOVENIA
Abstract
Seismic microzonations identify the local geological conditions that amplify ground motion and define zones with homogeneous seismic behaviour. Usually three levels of seismic microzonation are used. Level 1 consists of collecting existing data and is preparatory for higher levels. At level 2 amplification factors are assigned to microzones through simplified methods such as empirical laws. At level 3 the amplification factors are calculated for each microzone through numerical methods based on extensive geophysical, drilling and seismological investigations. Seismic microzonation is applied in the seismic resistant design of buildings and structures, in territorial and urban planning, and in emergency planning to better address civil protection resources. Since existing microzonations in Slovenia are not sufficient for seismic resistant design and urban planning, it is necessary to start an adequate investigation programme to achieve the second and third levels of seismic microzonation.
References
Ansal, A., 2004. Recent advances in earthquake geotechnical engineering and microzonation. Kluwer Academic Publishers, Dordrecht, 354 str.
Bramerini, F., Castenetto, S., Naso, G., 2015. Guidelines for Seismic Microzonation. Conference of Regions and Autonomous Provinces of Italy – Civil Protection Department. Rome, 120 str.
Godec, M., Vidrih, R., Lapajne, J., 1991. Potresna ogroženost mesta Ljubljane – II. del. Seizmološki zavod republike Slovenije, Ljubljana, 102 str.
Gosar, A., 2007. Microtremor HVSR study for assessing site effects in the Bovec basin (NW Slovenia) related to 1998 Mw5.6 and 2004 Mw5.2 earthquakes. Engineering geology, 91, 178–193.
Gosar, A., Rošer, J., Šket Motnikar, B., Zupančič, P., 2010. Microtremor study of site effects and soil-structure resonance in the city of Ljubljana (central Slovenia). Bulletin of earthquake engineering, 8/3, 571–592.
Gosar, A., 2012. Determination of masonry building fundamental frequencies in five Slovenian towns by microtremor excitation and implications for seismic risk assessment. Natural Hazards, 62/3, 1059–1079.
Kokošin, J., Gosar, A., 2013. Seismic microzonation of Breginjski kot (NW Slovenia) based on detailed engineering geological mapping. The Scientific World Journal, Article ID 626854, 12 str.
Lapajne, J., 1970. Seizmična mikrorajonizacija Ljubljane – geofizikalne raziskave. Geološki zavod Ljubljana, Ljubljana, 16 str.
Lapajne, J., Šket Motnikar, B., Zupančič, P., 2001. Nova karta potresne nevarnosti – projektni
pospešek tal namesto intenzitete. Gradbeni vestnik 50, 140–149.
Lutman, M., Weiss, P., Klemenc, I., Zupančič, P., Šket Motnikar, B., Banovec, P., Cerk, M., 2013. POTROG – Potresna ogroženost v Sloveniji za potrebe Civilne zaščite. Uprava RS za zaščito in reševanje, Ljubljana, 640 str.
Mayer-Rosa, D., Jimenez, M. J., 2000. Seismic zoning: State of the art and recommendations for Switzerland. Geologische Berichte Nr. 26, Bern.
Medvedev, S. V., 1965. Inženjerska seizmologija (prevod iz ruščine v srbohrvaščino). Građevinska knjiga, Beograd, 268 str.
Reiter, L., 1990. Earthquake hazard analysis. Columbia University Press, New York, 253 str.
Ribarič, V., Hadžijevski, V., Pekevski, D., Jorgić, M., Kuk, V., Šupič, V., Vukašinović, M., 1987. Seizmološke karte SFR Jugoslavije i Tumač. Zajednica za seizmologiju SFR Jugoslavije, Beograd.
SIST EN 1998-1, 2005. Evrokod 8 – Projektiranje potresnoodpornih konstrukcij – 1. del: Splošna pravila, potresni vplivi in pravila za stavbe, slovenski standard, Slovenski inštitut za standardizacijo, Ljubljana.
Šket Motnikar, B., Zupančič, P., 2011. Karta potresne intenzitete Slovenije. Ujma 25, 226–231.
Vidrih, R., Godec, M., Lapajne, J., 1991. Potresna ogroženost Slovenije: občina Brežice, občina Idrija, občina Krško, ljubljanske občine, občina Tolmin. Seizmološki zavod Republike Slovenije, Ljubljana, 214 str.
Ribičič, M., Vidrih, R., Godec, M., 2000. Seizmogeološki in geotehnični pogoji gradnje v zgornjem Posočju. Geologija, 43/1, 115–143.
Zupančič, P., Šket Motnikar, B., Gosar, A., Prosen, T., 2004. Karta potresne mikrorajonizacije Mestne občine Ljubljana. Potresi v letu 2002, 12, 32–54.
Zupančič, P., 2013. Potresna mikrorajonizacija Ljubljane. Ujma, 27, 148–152.
Youd, T. L., 2003. Liquefaction mechanisms and induced ground failure. V: Lee in sod (ur.): International handbook of Earthquake and Engineering Seismology. Academic Press, Amsterdam, 1159–1173.
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