發(fā)布時間：2018-05-13 07:35

  本文選題：歷史震害 + 地震��； 參考：《西安建筑科技大學》2017年碩士論文

【摘要】：我國歷史上是個震害多發(fā)國家,地震發(fā)生頻繁波及范圍廣。近年來隨著國民經濟的迅速發(fā)展,地震災害帶來的經濟損失逐年增大。因此在重大項目建設前期針對其場地的地震安全評估顯得尤為重要,以地震安全評價結果為依據,確定抗震設防標準。本文通過對我國歷史震害資料的歸納總結,得出重大工程中地震地質災害評估的重要性。并以某大型化工企業(yè)設備裝置擴容改造項目為背景,結合現有的地震安全評估理論對工程所在地的場地的區(qū)域地震活動、地震概率危險性、土層反應和地震動參數等進行評價研究。(1)通過對工程場地區(qū)域大量地震資料的歸納分析得出評估區(qū)100年內發(fā)生7級以上地震的概率在0.33-0.65之間,對工程場地有較大影響的是汾渭地震帶中的渭河地震亞帶。地震活動性研究表明,評估區(qū)近場區(qū)地震活動的空間和時間分布離散性較大。(2)通過對評估區(qū)域地質情況的勘察研究得出層土的剪切波速介于150-540m/s之間,各層土密度介于1.8-2.4kg/m3之間,評估場地工程地震條件較好,整體穩(wěn)定性較好。(3)通過概率危險性分析得出工程場地50年不同超越概率情況下等效震源距和等效震級,其中最小的等效震源距為78.62km,最大等效震級為7.30。(4)通過對地震動設計參數確定方法的研究,確定了工程場地設計地震動參數,并對工程所在地地質災害進行了評價。
[Abstract]:China is a country with frequent earthquake damage in history. With the rapid development of national economy in recent years, the economic losses caused by earthquake disasters are increasing year by year. Therefore, it is very important to evaluate the seismic safety of the site in the early stage of the major project construction. Based on the results of the seismic safety evaluation, the standard of seismic fortification is determined. Based on the summary of historical earthquake disaster data in China, the importance of seismic geological hazard assessment in major engineering is obtained in this paper. Based on the project of equipment expansion and reconstruction in a large chemical enterprise, combined with the existing theory of seismic safety assessment, the regional seismic activity and seismic probability risk of the site of the project are studied. Based on the analysis of a large number of seismic data in the engineering site area, it is concluded that the probability of occurrence of earthquakes with M 鈮，

本文編號：1882260