Seismic risk estimation from overturning analysis of hellenistic columns using DDA
We present here back analysis of structural collapse of monolithic granite columns used as supports in a Hellenistic cathedral which was destroyed during a strong earthquake probably in 749 AD. First an existing analytical solution for dynamic rocking of columns is compared with results obtained using the numerical DDA method. We then proceed with forward DDA modeling to obtain the most likely frequency and peak acceleration of the accelerogram which triggered the observed failures, using sinusoidal input functions. While we find that the required PGA for overturning is frequency dependent, we believe that an input frequency of 2 Hz and PGA of 0.6 g can explain the observed column failure at Susita.
PGA DDA Back Analysis Seismic Risk Toppling Dynamic Analysis
G.YAGODA Y.H.HATZOR
Dept.of Geological and Environmental Sciences, Ben-Gurion University of the Negev, Beer-Sheva, ISRAE Dept.of Geological and Environmental Sciences, Ben-Gurion University of the Negev, Beer-Sheva, ISRAE
国际会议
北京
英文
123-128
2007-08-14（万方平台首次上网日期，不代表论文的发表时间）