地震学报（英文版）2003，Vol.16Issue(2)：205-212,8.
Rupture directivity and hanging wall effect in near field strong ground motion simulation
Rupture directivity and hanging wall effect in near field strong ground motion simulation
摘要
Abstract
A random synthesis procedure based on finite fault model is adopted for near field strong ground motion simulation in this paper. The fault plane of the source is divided into a number of sub-sources, the whole moment magnitude is also divided into more sub-events. The Fourier spectrum of ground motion caused by a sub-event in given sub-source, then can be derived by means of taking the point source spectrum, attenuation with distance, energy dissipation, and near surface effect, into account. A time history is synthesized from this amplitude spectrum and a random phase spectrum, and being combined with an envelope function. The ground motion is worked out by superposition of all time histories from each sub-event in each sub-source, with time lags determining by the differences between the triggering times of sub-events and distances of the sub-sources. From the example of simulations at 21 near field points in a scenario earthquake with 4 dip angles of the fault plane, it is illustrated that the procedure can describe the rupture directivity and hanging wall effect very well. To validate the procedure, the response spectra and time histories recorded at three near fault stations MCN, LV3 and PCD during the Northridge earthquake in 1994, are compared with thesimulated ones.关键词
near field strong ground motion/rupture directivity/hanging wall/source/random synthesisKey words
near field strong ground motion/rupture directivity/hanging wall/source/random synthesis分类
天文与地球科学引用本文复制引用
陶夏新,王国新..Rupture directivity and hanging wall effect in near field strong ground motion simulation[J].地震学报（英文版）,2003,16(2):205-212,8.基金项目
Earthquake Science Foundation under Contract No.201009 （）
