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首页> 外文期刊>Bulletin of earthquake engineering >Which is a better proxy, site period or depth to bedrock, in modelling linear site response in addition to the average shear-wave velocity?
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Which is a better proxy, site period or depth to bedrock, in modelling linear site response in addition to the average shear-wave velocity?

机译：除了平均剪切波速度之外，这是建模线性部位响应的更好的代理，现场周期或深度，在线性部位响应？

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This study aims to identify the best-performing site characterization proxy alternative and complementary to the conventional 30 m average shear-wave velocity V-S30, as well as the optimal combination of proxies in characterizing linear site response. Investigated proxies include T-0 (site fundamental period obtained from earthquake horizontal-to-vertical spectral ratios), V-Sz (measured average shear-wave velocities to depth z, z = 5, 10, 20 and 30 m), Z(0.8) and Z(1.0) (measured site depths to layers having shear-wave velocity 0.8 and 1.0 km/s, respectively), as well as Z(x-infer) (inferred site depths from a regional velocity model, x = 0.8 and 1.0, 1.5 and 2.5 km/s). To evaluate the performance of a site proxy or a combination, a total of 1840 surface-borehole recordings is selected from KiK-net database. Site amplifications are derived using surface-to-borehole response-, Fourier- and cross-spectral ratio techniques and then are compared across approaches. Next, the efficacies of 7 single-proxies and 11 proxy-pairs are quantified based on the site-to-site standard deviation of amplification residuals of observation about prediction using the proxy or the pair. Our results show that T-0 is the best-performing single-proxy among T-0, Z(0.8), Z(1.0) and V-Sz. Meanwhile, T-0 is also the best-performing proxy among T-0, Z(0.8), Z(1.0) and Z(x-infer) complementary to V-S30 in accounting for the residual amplification after V-S30-correction. Besides, T-0 alone can capture most of the site effects and should be utilized as the primary site indicator. Though (T-0, V-S30) is the best-performing proxy pair among (V-S30, T-0), (V-S30, Z(0.8)), (V-S30, Z(1.0)), (V-S30, Z(x-infer)) and (T-0, V-Sz), it is only slightly better than (T-0, V-S20). Considering both efficacy and engineering utility, the combination of T-0 (primary) and V-S20 (secondary) is recommended. Further study is needed to test the performances of various proxies on sites in deep sedimentary basins.
机译：本研究旨在识别最佳性能的现场表征代理替代和与传统的30M平均剪切波速度V-S30的互补，以及表征线性部位响应的代理的最佳组合。调查的代理包括T-0（从地震水平到垂直光谱比率获得的站点基本时段），V-SZ（测得的平均剪切波速度为深度Z，Z = 5,10,20和30米），Z（ 0.8）和Z（1.0）（分别为具有剪切波速度0.8和1.0km / s的层的测量的位点深度）以及Z（X-DENG）（从区域速度模型推断出位点深度，x = 0.8 1.0,1.5和2.5 km / s）。为了评估站点代理或组合的性能，共有1840个表面钻孔记录选自KIK-NET数据库。使用表面到钻孔响应，傅立叶和横谱比技术来得出现场扩增，然后在接近方面比较。接下来，基于使用代理或该对的预测的预测的观察的扩增残差的站点对位标准偏差来量化7个单个代理和11个代理对的效果。我们的结果表明，T-0是T-0，Z（0.8），Z（1.0）和V-SZ之间的最佳单代理。同时，T-0也是在V-S30校正之后讨价为V-S30的T-0，Z（0.8），Z（1.0）和Z（X-DENG）之间的最佳性能的代理。互补。此外，单独的T-0可以捕获大部分现场效果，并应用作主要站点指示器。虽然（T-0，V-S30）是（V-S30，T-0）中最佳性能的代理对，（V-S30，Z（0.8）），（V-S30，Z（1.0））， （V-S30，Z（X-DENG））和（T-0，V-SZ），它仅优于（T-0，V-S20）。考虑到功效和工程效用，建议使用T-0（初级）和V-S20（二级）的组合。需要进一步研究来测试深沉积盆地的各种代理的性能。

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