Applicability Analysis Of The Attenuation Relationship Of Ground Motion In Western My Country

Throughout the history,many large,destructive earthquakes happened in Western China,providing relatively rich strong ground motion records.A local GMPE dedicated specifically to Western China is of practical reference significance in the seismic fortification of this region.In this article,first there is a overview of the development of GMPE in and outside China.GMPEs that might work for Western China were selected and compared between each other and with available PGA records concerning Western China.Then a GMPE was corrected based on the idea of residual and a GMPE on PGA for Western China was purposed.Finally,both medium earthquakes after the 2008 Wenchuan M_W7.9 earthquake and records from the Wenchuan earthquake were used respectively to examine whether the newly purposed GMPE worked for medium earthquakes and large earthquakes in Western China.It has been found that the new GMPE does describe the attenuation characteristics of medium-strength earthquakes in Western China,but works not as well when it comes to larger earthquakes.Nonetheless,the newly developed GMPE is not too far from real records,thus has its engineering value to some extent.Here are several significant results of this article:1.The development and current status of ground motion attenuation research within and outside China was reviewed.2.Several criteria on selecting referable GMPEs for Western China was purposed.Based on these criteria several GMPEs that might work for Western China were selected and compared between each other in an exhaustive way.3.A correction method based on residual analysis was formulated and applied when developing a GMPE on PGA dedicated specifically to Western China.Seismic records were compared to result calculated by purposed GMPE,proving that both the GMPE itself and the method are reliable and practical.The GMPE given in this article might has its value in civil engineering.