排序方式： 共有6条查询结果，搜索用时 15 毫秒
1
1.
The effect of asymmetry and irregularity of the inputted seismic waves on the earthquake-induced differential settlement of the buildings on natural subsoil is investigated in terms of the earthquake damage phenomena, theoretical analyses, dynamic triaxial tests and shaking table tests. A conclusion can be drawn from the investigation results that, the asymmetrical and irregular character of the inputted seismic waves themselves may have a significant contribution to the differential settlement of subsoil and buildings in some cases, and this is a necessary factor to be considered in reasonable evaluation for the differential settlement and other problems relating to the soil deformation due to earthquakes. 相似文献
2.
Mario Benhumea Leon 《Geotechnical and Geological Engineering》1989,7(1):59-68
Summary The seismic events occurring on 19 and 20 September 1985, whose epicentre was located in the coastal region of Michoacan, Mexico, produced tremendous damage in Mexico City. As a result of these losses the civil authorities of the city decided to study and evaluate the mechanical characteristics of the subsoil. To achieve this, it was necessary to drill several boreholes to obtain needed geophysical and geotechnical information. The geophysical method of electrical resistivity was the most appropriate to the research. This method enabled us to understand the structure and soil characteristics of the Mexican Valley. 相似文献
3.
In a companion paper local transfer functions were estimated at Tecoman using earthquake and microtremor data. In this paper, the subsoil structure at this city is investigated using seismic refraction and cross-correlation of noise records as a case study. P- and S-wave refraction profiles were measured at five sites within the city. Standard analysis constrained only very shallow layers. The P-wave refraction deployment was also used to record ambient vibration. These data were processed using an extension of the SPAC (SPatial AutoCorrelation (Aki, 1957) [1]) method; cross-correlation is computed between station pairs and the results are inverted to obtain a phase velocity dispersion curve. Penetration depth was larger than that from the refraction experiments but the shear-wave velocity of the basement could not be determined. For this reason, additional microtremor measurements were made using broad band seismometers with a larger spacing between stations. The results allowed to constrain the shear-wave velocity of the basement. Site amplification computed for the final profiles compare well with observed ground motion amplification at Tecoman. The case of Tecoman illustrates that even a simple subsoil structure may require crossing data from different experiments to correctly constrain site effects. 相似文献
4.
发展高速铁路是解决城市间交通问题的有效途径，但其所产生的振动和噪声引起的环境问题，对铁路沿线居民及周围建筑等造成不利影响。在对高速铁路引起的振动问题进行的研究中，关于高速列车引起的地基土振动随深度变化的相对较少。因此，本文针对Ⅱ、Ⅲ和Ⅳ类场地条件下的路堤式和高架桥式高速铁路，对0—5m不同深度处地基土的振动加速度响应进行了现场测试，并以测试数据为基础，分析了不同场地条件下高速列车引起的地基土振动加速度响应随深度的变化规律。结果表明，不同场地条件下，高速列车引起的振动加速度响应随深度的变化规律具有显著差异；Ⅱ类和Ⅲ类场地条件下，高速列车引起的地基土振动加速度响应总体随深度的增加而逐渐减小，并呈先快后慢的衰减趋势；而Ⅳ类场地条件下，高速列车引起的地基土振动加速度响应随深度的增加呈现先减小后放大的趋势，在深3m处加速度达到最大值。高速列车运行引起的振动频带随深度的变化特征与场地相关。 相似文献
5.
6.
1