000019184 001__ 19184
000019184 005__ 20170118182303.0
000019184 04107 $$aeng
000019184 046__ $$k2017-01-09
000019184 100__ $$aLi, Yanan
000019184 24500 $$aStrong Ground Motion Simulation for Recent Earthquakes in China

000019184 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019184 260__ $$b
000019184 506__ $$arestricted
000019184 520__ $$2eng$$aStochastic point source method with its extended version finite fault method is widely used to simulate strong ground motions around the world. In view of the limitation of uniform slip distribution in point source method with effective distance (R EFF ), a new modified version of the stochastic method based on a proposed equivalent distance (R EQL ) measure is proposed. To incorporate the effect of heterogeneous slip distribution on previous modified point source method, the uneven slip values are first transformed to distance value assigned to sub-faults, and then solved for the comprehensive distance R EQL iteratively to the path spreading functions. At last, the ratio of total spectrum Y for non-uniform and uniform slip distributions can be obtained from the path term in Y spectrum. The new modified method is used to simulate two recent earthquakes in China, The Wenchuan (Mw=8.3, 12 May, 2008) and Ludian (Mw=6.2, 3 August, 2014) earthquakes. For Wenchuan earthquake, envelop method is combined with the new present method to simulate the waveform of the acceleration time history because its fault is relatively long. Simulation results for 6 stations around the fault indicate that the present method could simulate the direction and hanging wall effect of strong earthquake. For Ludian earthquakes, parameters are investigated by analyzing 69 recorded accelerograms. Comparisons between observed and simulated parameters, such as peak ground acceleration (PGA) against R EQL , waveforms and pseudo-spectral acceleration (PSA), indicate that the simulation parameters and results for Ludian earthquake (Mw 6.2, 3 August, 2014, China) are quite acceptable. Furthermore, the ShakeMaps of Ludian in terms of PGA simulated by the present method and finite-fault method are further compared with intensity map published by China Earthquake Administration, which also confirms the validity of the new simulation procedure for the purpose of regional strong ground motion estimation. The simulation results also indicate that input parameters for the two earthquakes are similar. The proposed method has the advantage of simple and efficient on computation efficiency.

000019184 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019184 653__ $$apoint-source method; finite-fault method; equivalent distance; Wenchuan earthquake; Ludian earthquake

000019184 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019184 720__ $$aLi, Yanan$$iLi, Cong$$iWang, Guoxin
000019184 8560_ $$ffischerc@itam.cas.cz
000019184 8564_ $$s923510$$uhttps://invenio.itam.cas.cz/record/19184/files/3036.pdf$$yOriginal version of the author's contribution as presented on USB, paper 3036.
000019184 962__ $$r16048
000019184 980__ $$aPAPER