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1D nonlinear site response analysis of the Isparta Basin (Southwestern Turkey) with surface wave (ReMi) and borehole data
Environmental Earth Sciences ( IF 2.8 ) Pub Date : 2021-03-25 , DOI: 10.1007/s12665-021-09551-4
Ali Silahtar , Mehmet Zakir Kanbur

This study presents a soil-response analysis of Isparta basin, is situated in the one of most important tectonic areas, using surface wave (ReMi™) and borehole data at 24 points. In the analysis, the nonlinear site response analysis approach was carried out using the DeepSoil software. The study area was characterized by C and D soil class according to NEHRP (National Earthquake Hazards Reduction Program) and TBEC-2018 (Turkish Building Earthquake Code-2018) soil classification criteria. For the modelling, the strong ground motion recordings of 6.9 Mw Irpinia and 6.4 Mw Dinar were used and the largest peak ground acceleration (PGA) and spectral acceleration (SA) maps of the study area were created. The Bdr-1914 model was made using Irpinia record, PGA values in the study area were determined in the range of 0.28–0.41 g and SA in the range of 0.77–1.82 g. In the Dnr-1995 model, the PGA values in the basin were found to be between 0.05–0.1 g and SA was within the range of 0.21–0.48 g. It was observed that the spectral accelerations on the surface, which significantly increased the effects of strong ground motion, particularly for Mw 6.9, near the city center and the Çünür area where new settlement areas were dense. The results indicate that ground specific design is required for construction in these areas, which are above the risk threshold in acceleration design spectra. At the same time, these results show the site response studies have critical importance and may make a significant contribution to the design of safe structures in the alluvial basins.



中文翻译:

伊斯帕塔盆地(土耳其西南部)的一维非线性场地响应分析,包括面波(ReMi)和井眼数据

这项研究利用地表波(ReMi™)和24个点的钻孔数据,对伊斯巴达盆地的土壤响应分析进行了分析,该盆地位于最重要的构造区域之一。在分析中,使用DeepSoil软件执行了非线性现场响应分析方法。根据NEHRP(国家减震计划)和TBEC-2018(土耳其建筑地震法规-2018)土壤分类标准,研究区的土壤类型为C和D。为了进行建模,使用了6.9 Mw Irpinia和6.4 Mw Dinar的强地面运动记录,并创建了研究区域的最大峰值地面加速度(PGA)和光谱加速度(SA)图。使用Irpinia记录制作了Bdr-1914模型,研究区域中的PGA值确定为0.28–0.41 g,SA的确定范围为0。77–1.82克。在Dnr-1995模型中,发现盆地中的PGA值在0.05–0.1 g之间,SA在0.21–0.48 g范围内。观察到地表的光谱加速度极大地增加了强地面运动的影响,特别是对于城市中心和新居民区密集的Çünür地区附近的6.9兆瓦。结果表明,在这些区域中进行施工需要进行针对地面的设计,这要高于加速度设计范围中的风险阈值。同时,这些结果表明场地响应研究具有至关重要的意义,并可能对冲积盆地安全结构的设计做出重大贡献。观察到地表的光谱加速度极大地增加了强地面运动的影响,特别是对于城市中心和新居民区密集的Çünür地区附近的6.9兆瓦。结果表明,在这些区域中进行施工需要进行针对地面的设计,这要高于加速度设计范围中的风险阈值。同时,这些结果表明场地响应研究具有至关重要的意义,并可能对冲积盆地安全结构的设计做出重大贡献。观察到地表的光谱加速度极大地增加了强地面运动的影响,特别是对于城市中心和新居民区密集的Çünür地区附近的6.9兆瓦。结果表明,在这些区域中进行施工需要进行针对地面的设计,这要高于加速度设计范围中的风险阈值。同时,这些结果表明场地响应研究具有至关重要的意义,并可能对冲积盆地安全结构的设计做出重大贡献。结果表明,在这些区域中进行施工需要进行针对地面的设计,这要高于加速度设计范围中的风险阈值。同时,这些结果表明场地响应研究具有至关重要的意义,并可能对冲积盆地安全结构的设计做出重大贡献。结果表明,在这些区域中进行施工需要进行针对地面的设计,这要高于加速度设计范围中的风险阈值。同时,这些结果表明场地响应研究具有至关重要的意义,并可能对冲积盆地安全结构的设计做出重大贡献。

更新日期:2021-03-25
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