發(fā)布時(shí)間：2018-05-28 08:44

  本文選題：地下結(jié)構(gòu) + 軟土場(chǎng)地��； 參考：《工程力學(xué)》2016年S1期

【摘要】：為獲取軟土場(chǎng)地的基巖地震波時(shí)程,該文利用波動(dòng)法和等效線性化技術(shù),通過(guò)自編地震波反演程序,以上海某軟土場(chǎng)地為例,反演求得了六條基巖處的地震波時(shí)程,并進(jìn)行了精度驗(yàn)證。在此基礎(chǔ)上,以某地鐵車站結(jié)構(gòu)為工程背景,采用ANSYS程序建立土-結(jié)構(gòu)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(duì)軟土場(chǎng)地中的地下結(jié)構(gòu)進(jìn)行了動(dòng)力響應(yīng)分析。結(jié)果表明:該文的軟土場(chǎng)地地震波反演計(jì)算可獲得較高精度的基巖地震波時(shí)程;對(duì)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(jié)構(gòu)相比,地下結(jié)構(gòu)雖然其水平位移反應(yīng)值較大,但結(jié)構(gòu)頂板與底板之間的水平向相對(duì)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(jì)大學(xué)土木工程防災(zāi)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家科技支撐計(jì)劃課題項(xiàng)目(2015BAK17B04) 科技部國(guó)家重點(diǎn)實(shí)驗(yàn)室基礎(chǔ)研究項(xiàng)目(SLDRCE14A-02)
【分類號(hào)】：TU93;TU311.3
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本文編號(hào)：1946055