本文選題：強(qiáng)地震動　切入點(diǎn)：衰減關(guān)系　出處：《哈爾濱工業(yè)大學(xué)學(xué)報(bào)》2017年06期 　論文類型：期刊論文

【摘要】：世界上大多數(shù)國家或地區(qū)缺少足夠的強(qiáng)地震動觀測數(shù)據(jù),難以直接用統(tǒng)計(jì)方法建立區(qū)域強(qiáng)地震動衰減關(guān)系.為克服這一瓶頸,本文討論了在這些地區(qū)建立基于地震學(xué)的強(qiáng)地震動衰減關(guān)系的進(jìn)展,強(qiáng)調(diào)了震源譜中的應(yīng)力降Δσ、品質(zhì)因子中的Q0和η以及幾何衰減項(xiàng)的兩個(gè)分段點(diǎn)距離R1和R2等區(qū)域性參數(shù)取值的重要性,提出了借助區(qū)域數(shù)字地震監(jiān)測臺網(wǎng)的小地震記錄(Mw=3.5~4.5、震源深度≤30 km)聯(lián)合反演這5個(gè)區(qū)域參數(shù)的思路和方法.將其作為輸入,建立區(qū)域強(qiáng)地震動衰減關(guān)系,用區(qū)域強(qiáng)地震動觀測數(shù)據(jù)(Mw≥4.5、震源深度≤30 km)檢驗(yàn),結(jié)果表明:在日本東北地區(qū),本文方法建立的衰減關(guān)系與強(qiáng)震記錄符合很好;在中國四川和云南地區(qū),檢驗(yàn)數(shù)據(jù)相對有限,5、6級的衰減關(guān)系與相應(yīng)的強(qiáng)震數(shù)據(jù)(4.5≤Mw5.5、5.5≤Mw6.5)符合不錯(cuò),7級的衰減在大于100 km處偏慢.通過3個(gè)地區(qū)的例子,說明了建立基于地震學(xué)強(qiáng)地震動衰減關(guān)系方法的適用性.
[Abstract]:In order to overcome this bottleneck, most countries or regions in the world lack enough observational data of strong ground motion to establish regional strong ground motion attenuation relationship directly by statistical method. This paper discusses the progress of establishing strong seismic attenuation relations based on seismology in these areas. The importance of stress drop 螖 蟽 in source spectrum, Q 0 and 畏 in quality factor and the distance between two segment points R 1 and R 2 of geometric attenuation term are emphasized. The idea and method of jointly inversion of these five regional parameters by means of the small seismic records of the regional digital seismic monitoring network (Mwn3.5b4.5and focal depth 鈮，

本文編號：1566943