- 摘 要
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鄒積麟， 郭春英， 徐海洋， 李 偉， 王華穎
（北京探索者軟件技術(shù)有限公司，北京 100089）[摘要] 場地特征周期Tg作為反應(yīng)譜平臺段的終止周期值，在規(guī)范中除了有明確的取值規(guī)定外，還允許按照（等效）剪切波速和覆蓋層厚度通過連續(xù)插值的方法得到。規(guī)范中給出了插值的參考圖和插值的連續(xù)性原則。仔細研究發(fā)現(xiàn)，規(guī)范中給出的Tg插值參考圖在分區(qū)間和臺階轉(zhuǎn)換處，存在著插值密度不連續(xù)的情況。從不同分區(qū)間的過渡和臺階轉(zhuǎn)換的兩個角度出發(fā)，推導(dǎo)出插值密度連續(xù)的Tg插值方案，推導(dǎo)了有臺階轉(zhuǎn)換的插值方案，不僅解決了分區(qū)間插值密度連續(xù)的問題，同時也實現(xiàn)了Ⅲ區(qū)內(nèi)的臺階轉(zhuǎn)換的連續(xù)性問題，解決了規(guī)范中隱含的連續(xù)性插值分區(qū)內(nèi)的插值密度連續(xù)性問題，使插值過程更加嚴謹，還同時給出了滿足工程精度的實用方法，可為實際工程設(shè)計提供參考。
[關(guān)鍵詞] 場地特征周期；反應(yīng)譜曲線
中圖分類號：TU318 文獻標識碼：A 文章編號：1002-848X(2012) Sl-0197-04Study on the interpolation of site characteristic period
Zou Jilin, Guo Chunying, Xu Haiyang, Li Wei, Wang Huaying
( Beijing Explorer Software Technology Co., Ltd., Beijing 100089, China)Abstract: As the tum point of spectrum curve, the value of the characteristic period Tg is not only explicitly defined in the code, but also be interpolated on basis of( equivalent) shear velocity and overlay thickness. The code prescribes the smoothness principle of interpolation. On scrutinizing, the Tg interpolation reference diagram given by code is not smoothly transferred through regions and step-transition. From views of inter-region transfer and step-transition, a smoothly transferred interpolation scheme was proposed.
Keywords: characteristic period; spectmm curve
