Vol.9, No 2, 2011 pp. 231 - 240
UDC 550.34:532.542:622.323:622.324=111
DOI: 10.2298/FUACE1102231Z
SEISMIC HAZARD IN THE DESIGN OF OIL AND GAS PIPELINES
Slavko Zdravković, Biljana Mladenović, Dragan Zlatkov
University of Niš, The Faculty of Civil Engineering and Architecture, Serbia
Criteria that are adopted in earthquake resistant design of pipelines and gas lines have to take into account seismic movements and seismic generated forces that are of significantly high probability level of appearance along the length of pipeline. A choice of criteria has to include an acceptable level of seismic hazard, while design criteria should be calculated. Seismic hazard is defined as a part of natural hazard and means probability of appearance of earthquake of corresponding characteristics in certain time and place. For design needs and calculation of influences caused by seismic forces the most important is seismic hazard of maximal horizontal acceleration due to ground vibration during earthquake. The methodology of seismic hazard calculation as base for micro seismic zoning is presented in the paper. It is shown calculation of seismic hazard of maximal horizontal acceleration due to ground vibration that is applied for 985 points at the territory of Republic of Serbia, based on which maps for return periods of 50 and 200 years are drawn.
Key words: hazard, oil pipeline, gas line, fire, earthquake resistant design.
SEIZMIČKI HAZARD PRI PROJEKTOVANJU NAFTOVODA I GASOVODA
Kriterijumi koji su usvojeni u aseizmičkom projektovanju naftovoda i gasovoda treba da uzimaju u obzir seizmičko kretanje i seizmičke generisane sile koje imaju značajno veliki stepen verovatnoće pojavljivanja duž trase cevovoda. Izbor kriterijuma mora da sadrži jedan prihvatljivi nivo seizmičkog hazarda, dok će projektmi kriterijumi biti proračunati. Seizmički hazard se definiše kao deo prirodnog hazarda i predstavlja verovatnoću pojavljivanja zemljotresa odgovarajućih karakteristika u određenom periodu i na određenom mestu. Za potrebe projektovanja i proračuna uticaja seizmičkih sila najvažniji je seizmički hazard maksimalnog horizontalnog ubrzanja pri oscilovanju tla za vreme potresa. U radu se prikazuje metodologija proračuna seizmičkog hazarda kao osnove za mikroseizmičko zoniranje. Prikazan je proračun seizmičkog hazarda maksimalnog horizontalnog ubrzanja pri oscilovanju tla koji je primenjen za 985 tačaka na teritoriji Republike Srbije, a na osnovu čega su konstruisane karte za dva povratna perioda - 50 i 200 godina.
Ključne reči: hazard, naftovod, gasovod, požar, seizmički proračun