地震動(dòng)參數(shù)之阿里亞斯烈度和累積絕對(duì)速度的特征及其在概率地震危險(xiǎn)性分析中的應(yīng)用
發(fā)布時(shí)間：2018-10-14 12:54
【摘要】：地震動(dòng)參數(shù)是表征地震動(dòng)特性(振幅、頻率和持時(shí))的重要度量參數(shù)。目前使用最多的地震動(dòng)參數(shù)主要有峰值加速度和譜加速度等,然而任何單一地震動(dòng)參數(shù)都不能全面有效地反映所有的地震動(dòng)破壞特征(如峰值加速度僅反映振幅)。為了更加全面的描述地震動(dòng)特征及其潛在的破壞作用,滿足工程應(yīng)用的需求,科學(xué)家們一直在尋找能夠表征地震動(dòng)多種屬性和特定地震破壞的地震動(dòng)參數(shù)。經(jīng)研究發(fā)現(xiàn),阿里亞斯烈度Ia(Arias intensity)、累積絕對(duì)速度CAV(Cumulative absolute velocity)及Newmark位移在地震誘發(fā)滑坡預(yù)測(cè)、沙土液化評(píng)估、地震災(zāi)害損失估計(jì)以及地震危險(xiǎn)性分析等方面優(yōu)于峰值加速度,因此開展Ia、CAV和Newmark位移的特征研究及與其相關(guān)的地震危險(xiǎn)性分析方法研究對(duì)于拓展我們對(duì)地震動(dòng)特性的認(rèn)識(shí)和提高地震災(zāi)害預(yù)測(cè)水平具有重要的科學(xué)意義和應(yīng)用價(jià)值。本文我們根據(jù)汶川地震的177個(gè)臺(tái)站的528條可用記錄的強(qiáng)震數(shù)據(jù),在對(duì)地震記錄進(jìn)行基線校正后計(jì)算了地震動(dòng)參數(shù)Ia、CAV及Newmark位移,并研究了這些地震動(dòng)參數(shù)的相關(guān)特征,最后我們還開展了基于Ia、CAV及Newmark位移的概率地震危險(xiǎn)性分析方法研究。我們研究了汶川地震Ia的空間分布特征、衰減特征、近斷層特征以及Ia與其他地震動(dòng)參數(shù)的相關(guān)性。在空間分布特征研究中,我們比較了豎向和水平向Ia值的差異,統(tǒng)計(jì)了二者的比值分布及隨距離的變化特征;對(duì)于垂直斷層走向和平行斷層走向的Ia值也做了同樣的工作。在衰減特征方面,我們主要研究了3種場(chǎng)地類型下的Ia衰減特征及其與現(xiàn)有Ia預(yù)測(cè)模型的比較,指出了他們之間的差異并分析了導(dǎo)致差異的原因。在近斷層特征方面,主要研究了上盤效應(yīng)和方向性效應(yīng)對(duì)Ia的影響。最后我們研究了Ia與PGA和Housner烈度的相關(guān)性,建立了Ia與PGA和Housner烈度之間的經(jīng)驗(yàn)關(guān)系式,并分析了場(chǎng)地條件對(duì)地震動(dòng)參數(shù)之間相關(guān)性的影響。我們對(duì)CAV也同樣研究了其空間分布特征、衰減特征、近斷層特征以及CAV與其他地震動(dòng)參數(shù)的相關(guān)性。特別地,我們還研究了標(biāo)準(zhǔn)CAV的衰減特征和其與PGA的相關(guān)性,分析了場(chǎng)地條件對(duì)它們的影響。另外,我們簡(jiǎn)要分析了汶川地震Newmark位移的衰減特征及其與PGA和Ia的相關(guān)性。本文中我們還開展了基于Ia、CAV的概率地震危險(xiǎn)性分析方法研究,開展了基于Newmark位移的概率地震滑坡危險(xiǎn)性分析方法研究,梳理了相關(guān)的理論、方法,建立了相關(guān)的技術(shù)框架,編制了計(jì)算程序并在典型地區(qū)進(jìn)行了試算。本文的研究對(duì)我們認(rèn)識(shí)汶川地震乃至我國(guó)西部地震地質(zhì)構(gòu)造環(huán)境下地震的Ia、CAV及Newmark位移的相關(guān)特征具有重要的科學(xué)意義。建立的相關(guān)概率地震危險(xiǎn)性分析方法的技術(shù)框架對(duì)于提高我國(guó)的概率地震危險(xiǎn)性分析水平和地震災(zāi)害預(yù)測(cè)水平具有重要的應(yīng)用價(jià)值。
[Abstract]:Seismic parameters are important parameters to characterize the characteristics of ground motion (amplitude, frequency and duration). At present, the most commonly used parameters of ground motion are peak acceleration and spectral acceleration. However, any single ground motion parameter can not fully and effectively reflect all the damage characteristics of ground motion (for example, the peak acceleration only reflects the amplitude). In order to fully describe the characteristics of ground motion and its potential damage and meet the needs of engineering applications, scientists have been looking for seismic parameters that can represent the various properties of ground motion and specific earthquake damage. It is found that Avias intensity Ia (Arias intensity), accumulative absolute velocity CAV (Cumulative absolute velocity) and Newmark displacement are superior to peak acceleration in earthquake induced landslide prediction, sand liquefaction assessment, earthquake disaster loss estimation and seismic hazard analysis. Therefore, the research on the characteristics of Ia,CAV and Newmark displacements and the methods of seismic hazard analysis related to them have important scientific significance and application value in expanding our understanding of seismic characteristics and improving the level of earthquake disaster prediction. In this paper, based on the data of 528 strong earthquakes available from 177 stations in Wenchuan earthquake, we calculate the ground motion parameters Ia,CAV and Newmark displacement after the baseline correction of the seismic records, and study the relevant characteristics of these seismic parameters. Finally, the probabilistic seismic hazard analysis method based on Ia,CAV and Newmark displacements is studied. We have studied the spatial distribution, attenuation, near fault and the correlation between Ia and other seismic parameters of Wenchuan earthquake. In the study of spatial distribution characteristics, we compare the differences between vertical and horizontal Ia values, and calculate the ratio distribution and variation characteristics with distance, and do the same work for the Ia values of vertical fault strike and parallel fault strike. In terms of attenuation characteristics, we mainly study the attenuation characteristics of Ia under three site types and their comparison with existing Ia prediction models, point out the differences between them and analyze the causes of the differences. In terms of near-fault characteristics, the effects of upper disc effect and directional effect on Ia are mainly studied. Finally, we study the correlation between Ia and PGA and Housner intensity, establish the empirical relationship between Ia and PGA and Housner intensity, and analyze the influence of site conditions on the correlation between ground motion parameters. We also study the spatial distribution, attenuation, near-fault characteristics of CAV and the correlation between CAV and other seismic parameters. In particular, we also study the attenuation characteristics of standard CAV and its correlation with PGA, and analyze the influence of site conditions on them. In addition, we briefly analyze the attenuation characteristics of Newmark displacement in Wenchuan earthquake and its correlation with PGA and Ia. In this paper, the probabilistic seismic risk analysis method based on Ia,CAV and the probabilistic landslide hazard analysis method based on Newmark displacement are also studied, and the relevant theories and methods are combed, and the relevant technical framework is established. A calculation program is compiled and a trial calculation is carried out in a typical area. The study in this paper is of great scientific significance for us to understand the characteristics of the Ia,CAV and Newmark displacements of earthquakes in Wenchuan earthquake and the earthquake geological environment in the west of China. The technical framework of the related probabilistic seismic hazard analysis method has important application value in improving the level of probabilistic seismic hazard analysis and earthquake disaster prediction in China.
【學(xué)位授予單位】：中國(guó)地震局地球物理研究所
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2017
【分類號(hào)】：P315
[Abstract]:Seismic parameters are important parameters to characterize the characteristics of ground motion (amplitude, frequency and duration). At present, the most commonly used parameters of ground motion are peak acceleration and spectral acceleration. However, any single ground motion parameter can not fully and effectively reflect all the damage characteristics of ground motion (for example, the peak acceleration only reflects the amplitude). In order to fully describe the characteristics of ground motion and its potential damage and meet the needs of engineering applications, scientists have been looking for seismic parameters that can represent the various properties of ground motion and specific earthquake damage. It is found that Avias intensity Ia (Arias intensity), accumulative absolute velocity CAV (Cumulative absolute velocity) and Newmark displacement are superior to peak acceleration in earthquake induced landslide prediction, sand liquefaction assessment, earthquake disaster loss estimation and seismic hazard analysis. Therefore, the research on the characteristics of Ia,CAV and Newmark displacements and the methods of seismic hazard analysis related to them have important scientific significance and application value in expanding our understanding of seismic characteristics and improving the level of earthquake disaster prediction. In this paper, based on the data of 528 strong earthquakes available from 177 stations in Wenchuan earthquake, we calculate the ground motion parameters Ia,CAV and Newmark displacement after the baseline correction of the seismic records, and study the relevant characteristics of these seismic parameters. Finally, the probabilistic seismic hazard analysis method based on Ia,CAV and Newmark displacements is studied. We have studied the spatial distribution, attenuation, near fault and the correlation between Ia and other seismic parameters of Wenchuan earthquake. In the study of spatial distribution characteristics, we compare the differences between vertical and horizontal Ia values, and calculate the ratio distribution and variation characteristics with distance, and do the same work for the Ia values of vertical fault strike and parallel fault strike. In terms of attenuation characteristics, we mainly study the attenuation characteristics of Ia under three site types and their comparison with existing Ia prediction models, point out the differences between them and analyze the causes of the differences. In terms of near-fault characteristics, the effects of upper disc effect and directional effect on Ia are mainly studied. Finally, we study the correlation between Ia and PGA and Housner intensity, establish the empirical relationship between Ia and PGA and Housner intensity, and analyze the influence of site conditions on the correlation between ground motion parameters. We also study the spatial distribution, attenuation, near-fault characteristics of CAV and the correlation between CAV and other seismic parameters. In particular, we also study the attenuation characteristics of standard CAV and its correlation with PGA, and analyze the influence of site conditions on them. In addition, we briefly analyze the attenuation characteristics of Newmark displacement in Wenchuan earthquake and its correlation with PGA and Ia. In this paper, the probabilistic seismic risk analysis method based on Ia,CAV and the probabilistic landslide hazard analysis method based on Newmark displacement are also studied, and the relevant theories and methods are combed, and the relevant technical framework is established. A calculation program is compiled and a trial calculation is carried out in a typical area. The study in this paper is of great scientific significance for us to understand the characteristics of the Ia,CAV and Newmark displacements of earthquakes in Wenchuan earthquake and the earthquake geological environment in the west of China. The technical framework of the related probabilistic seismic hazard analysis method has important application value in improving the level of probabilistic seismic hazard analysis and earthquake disaster prediction in China.
【學(xué)位授予單位】：中國(guó)地震局地球物理研究所
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2017
【分類號(hào)】：P315
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