發(fā)布時間：2018-05-28 08:44

  本文選題：地下結構 + 軟土場地��； 參考：《工程力學》2016年S1期

【摘要】：為獲取軟土場地的基巖地震波時程,該文利用波動法和等效線性化技術,通過自編地震波反演程序,以上海某軟土場地為例,反演求得了六條基巖處的地震波時程,并進行了精度驗證。在此基礎上,以某地鐵車站結構為工程背景,采用ANSYS程序建立土-結構相互作用體系分析模型,選取El-Centro地震波的反演基巖波作為輸入,對軟土場地中的地下結構進行了動力響應分析。結果表明:該文的軟土場地地震波反演計算可獲得較高精度的基巖地震波時程;對于不同類型的地震波,地面地震波峰值與基巖地震波峰值的比值有較大差異;與地上結構相比,地下結構雖然其水平位移反應值較大,但結構頂板與底板之間的水平向相對位移并不大。
[Abstract]:In order to obtain the seismic time history of bedrock in soft soil site, the seismic wave time history of six bedrock sites has been obtained by using wave method and equivalent linearization technique, and taking a soft soil site in Shanghai as an example, the seismic wave inversion program has been developed in this paper. The accuracy is verified. On this basis, taking the structure of a subway station as the engineering background, the analysis model of soil-structure interaction system is established by using ANSYS program, and the inversion bedrock wave of El-Centro seismic wave is selected as the input. The dynamic response of underground structure in soft soil site is analyzed. The results show that the inversion calculation of seismic wave in soft soil site can obtain a high accuracy time history of bedrock seismic wave, and for different types of seismic waves, the ratio of the peak value of surface seismic wave to that of peak value of seismic wave of bedrock is quite different. Compared with the above ground structure, the horizontal displacement response value of underground structure is larger, but the horizontal relative displacement between the roof and the floor of the structure is not large.
【作者單位】： 同濟大學土木工程防災國家重點實驗室;
【基金】：國家科技支撐計劃課題項目(2015BAK17B04) 科技部國家重點實驗室基礎研究項目(SLDRCE14A-02)
【分類號】：TU93;TU311.3
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本文編號：1946055