地震波反演与地下结构的动力响应分析

发布时间：2018-05-28 08:44

  本文选题：地下结构 + 软土场地　； 参考：《工程力学》2016年S1期

【摘要】：为获取软土场地的基岩地震波时程,该文利用波动法和等效线性化技术,通过自编地震波反演程序,以上海某软土场地为例,反演求得了六条基岩处的地震波时程,并进行了精度验证。在此基础上,以某地铁车站结构为工程背景,采用ANSYS程序建立土-结构相互作用体系分析模型,选取El-Centro地震波的反演基岩波作为输入,对软土场地中的地下结构进行了动力响应分析。结果表明:该文的软土场地地震波反演计算可获得较高精度的基岩地震波时程;对于不同类型的地震波,地面地震波峰值与基岩地震波峰值的比值有较大差异;与地上结构相比,地下结构虽然其水平位移反应值较大,但结构顶板与底板之间的水平向相对位移并不大。
[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.
【作者单位】： 同济大学土木工程防灾国家重点实验室;
【基金】：国家科技支撑计划课题项目(2015BAK17B04) 科技部国家重点实验室基础研究项目(SLDRCE14A-02)
【分类号】：TU93;TU311.3
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本文编号：1946055