【摘要】：隨著全球?yàn)I海經(jīng)濟(jì)帶的不斷開(kāi)發(fā)和建設(shè),濱海區(qū)域逐漸地成為了人口集聚地和社會(huì)經(jīng)濟(jì)中心,這些地區(qū)的抗震設(shè)防問(wèn)題也日益受到重視。濱海區(qū)域由于地理位置特殊、板塊機(jī)制復(fù)雜,易受到不同類(lèi)型地震的影響,因此,本文以日本濱海復(fù)雜板塊區(qū)域不同類(lèi)型地震的地震動(dòng)為基礎(chǔ),探討了其特征和衰減規(guī)律,主要研究?jī)?nèi)容如下:1、總結(jié)了國(guó)內(nèi)外關(guān)于濱海區(qū)域地震動(dòng)特征的研究現(xiàn)狀、震源類(lèi)型的分類(lèi)標(biāo)準(zhǔn)以及衰減關(guān)系研究的常用方法。整理了日本濱海區(qū)域的地震動(dòng)和場(chǎng)地資料,得到地震動(dòng)參數(shù)和場(chǎng)地Vs30參數(shù),建立了數(shù)據(jù)集;通過(guò)對(duì)數(shù)據(jù)集中的地震震級(jí)、震中距和震源深度的分析論證了數(shù)據(jù)集的合理性;基于數(shù)據(jù)集和典型衰減模型得到了濱海區(qū)域四類(lèi)震源的衰減關(guān)系。2、采用模型檢驗(yàn)和對(duì)比方法對(duì)建立的濱海復(fù)雜板塊區(qū)域的地震動(dòng)衰減模進(jìn)行分析。通過(guò)模型檢驗(yàn)分析表明擬合模型的標(biāo)準(zhǔn)差較小、殘差分布均勻、沒(méi)有明顯的偏態(tài),論證了模型的準(zhǔn)確性。與已有衰減模型的對(duì)比分析表明了本文衰減模型的趨勢(shì)及PGA和反應(yīng)譜值的大小是合理的。3、對(duì)比建立的四類(lèi)震源地震的衰減關(guān)系和預(yù)測(cè)反應(yīng)譜,結(jié)果發(fā)現(xiàn),四類(lèi)震源的地震動(dòng)衰減規(guī)律有明顯的差異,其中上地幔地震的衰減速度最慢,PGA最小;俯沖帶板緣地震和俯沖帶板內(nèi)地震的衰減規(guī)律相似,大小相近。對(duì)比四類(lèi)震源地震的預(yù)測(cè)反應(yīng)譜發(fā)現(xiàn),預(yù)測(cè)反應(yīng)譜在周期為0.1~0.3s時(shí)取得最大值,在短周期近場(chǎng)處,上地幔地震最小。4、分析了建立的近海地震動(dòng)數(shù)據(jù)中幾種典型的地震動(dòng),推薦了斷層多次破裂、能量集中、長(zhǎng)持時(shí)、典型震源和不同場(chǎng)地類(lèi)別的典型地震動(dòng)記錄,為濱海場(chǎng)地的地震動(dòng)輸入提供參考。
[Abstract]:With the continuous development and construction of the global coastal economic belt, the coastal area has gradually become the population concentration area and the social economic center, and the seismic fortification problem in these areas has also been paid more and more attention. Because of its special geographical location and complex plate mechanism, the coastal area is susceptible to different types of earthquakes. Therefore, based on the ground motion of different types of earthquakes in the coastal complex plate area of Japan, this paper discusses its characteristics and attenuation law. The main research contents are as follows: 1. The research status of seismic features in coastal area, the classification criteria of source types and the common methods of attenuation relationship are summarized. In this paper, the ground motion and site data in the coastal area of Japan are sorted out, the ground motion parameters and site Vs30 parameters are obtained and the data set is established, and the rationality of the data set is proved by analyzing the magnitude, epicenter distance and focal depth of the data set. Based on the data set and the typical attenuation model, the attenuation relation of the four types of seismic sources in the coastal area is obtained. 2. The attenuation model of the seismic ground motion in the coastal complex plate area is analyzed by the method of model checking and comparison. The model test analysis shows that the standard deviation of the fitting model is small, the residual error distribution is uniform, and there is no obvious bias, and the accuracy of the model is proved. The comparison between the attenuation model and the existing attenuation model shows that the trend of the attenuation model and the value of PGA and response spectrum are reasonable. 3. The attenuation relation and the predicted response spectrum of the four types of focal earthquakes are established by comparison. The results show that the attenuation relationship and the predicted response spectrum of the four types of focal earthquakes are reasonable. There are obvious differences in the attenuation law of ground motion among the four types of sources, in which the attenuation velocity of upper mantle earthquakes is the slowest and the PGA is the smallest. The attenuation law of the subduction zone plate edge earthquake is similar to that of the subduction zone plate earthquake, and the magnitude of the subduction zone plate edge earthquake is similar. Comparing the predicted response spectra of four types of source earthquakes, it is found that the predicted response spectrum reaches the maximum when the period is 0.1? 0.3 s, and the upper mantle earthquake is the smallest at the near field of short period. Several typical ground motions in the established offshore ground motion data are analyzed, and the typical ground motion records of typical source and different site types are recommended for multiple rupture of faults, energy concentration, long duration, and so on. It provides a reference for the input of ground motion to the coastal site.
【學(xué)位授予單位】：中國(guó)地震局工程力學(xué)研究所
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：P315.9

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