發(fā)布時(shí)間：2018-02-25 18:33

  本文關(guān)鍵詞： 剪切波速測(cè)試 誤差分布 偏差量 地震動(dòng)　出處：《中國(guó)地震局工程力學(xué)研究所》2015年博士論文　論文類型：學(xué)位論文

【摘要】：剪切波速是巖土體介質(zhì)一個(gè)重要參數(shù),由于測(cè)試結(jié)果直觀、操作簡(jiǎn)單易行,現(xiàn)場(chǎng)剪切波速實(shí)驗(yàn)已經(jīng)成為工程中常用的實(shí)驗(yàn)之一。對(duì)任何一個(gè)可以重復(fù)測(cè)量科學(xué)數(shù)據(jù),其誤差水平、置信區(qū)間都是必須回答的問(wèn)題,但迄今為止現(xiàn)場(chǎng)剪切波速測(cè)試誤差專門研究基本為空白。這就導(dǎo)致工程和科研人員對(duì)現(xiàn)有剪切波速測(cè)試技術(shù)的精度爭(zhēng)論很大,對(duì)其結(jié)果的可靠性心存疑慮,也無(wú)法制訂相關(guān)標(biāo)準(zhǔn)并改進(jìn)技術(shù)。同時(shí),場(chǎng)地波速離散性對(duì)地震動(dòng)的影響一直是一項(xiàng)重要的研究課題,但由于波速實(shí)測(cè)誤差未知,以往的研究只能采用假定的波速離散程度研究其對(duì)地震動(dòng)的影響。這就導(dǎo)致分析結(jié)果缺乏依據(jù),也無(wú)法從波速對(duì)地震動(dòng)影響的角度評(píng)價(jià)現(xiàn)有波速實(shí)驗(yàn)的精度和技術(shù)水平。本文緊密結(jié)合工程和科研工作需求,設(shè)計(jì)了剪切波速測(cè)試誤差專項(xiàng)實(shí)驗(yàn)并獲得了較為系統(tǒng)的實(shí)驗(yàn)結(jié)果;對(duì)測(cè)試誤差的分布進(jìn)行了統(tǒng)計(jì)建模并對(duì)其進(jìn)行了評(píng)價(jià);采用實(shí)測(cè)的剪切波速測(cè)試誤差計(jì)算分析了其對(duì)地震動(dòng)的影響,依據(jù)統(tǒng)計(jì)結(jié)果給出了不同概率水平的波速測(cè)試誤差對(duì)地震動(dòng)的影響程度評(píng)價(jià)。本文通過(guò)大量的現(xiàn)場(chǎng)工作以及計(jì)算分析,研究了現(xiàn)場(chǎng)剪切波速測(cè)試誤差及其對(duì)地震動(dòng)的影響,完成了以下工作:組織了國(guó)內(nèi)55家具有代表性的單位,在中國(guó)大陸8個(gè)地區(qū)的20個(gè)不同類別的場(chǎng)地上,第一次完成了現(xiàn)場(chǎng)剪切波速測(cè)試誤差專項(xiàng)實(shí)驗(yàn),獲取了600組實(shí)測(cè)數(shù)據(jù)。數(shù)據(jù)分析表明測(cè)試結(jié)果符合統(tǒng)計(jì)學(xué)理論,實(shí)驗(yàn)設(shè)計(jì)合理、結(jié)果可靠。通過(guò)實(shí)測(cè)數(shù)據(jù),分析了測(cè)試環(huán)境對(duì)剪切波速測(cè)試誤差的影響,指出其中影響較大的是實(shí)驗(yàn)場(chǎng)地的環(huán)境噪音。噪音較大的場(chǎng)地波速測(cè)試的離散性較大,而土性、地下水埋深等因素對(duì)波速測(cè)試誤差基本沒(méi)有影響。建立了現(xiàn)場(chǎng)剪切波速測(cè)試誤差的分布模型并進(jìn)行了統(tǒng)計(jì)檢驗(yàn),第一次給出了現(xiàn)場(chǎng)剪切波速測(cè)試誤差的分布特征,得到了不同場(chǎng)地類別、不同測(cè)試深度的剪切波速測(cè)試誤差水平基本相當(dāng)?shù)闹匾Y(jié)論,給出了評(píng)價(jià)波速測(cè)試技術(shù)水平的初步建議。通過(guò)實(shí)測(cè)數(shù)據(jù),研究了在不同地震波輸入時(shí),不同類別場(chǎng)地上的波速測(cè)試誤差對(duì)地震動(dòng)的影響;以PGA和SI為指標(biāo),提出了不同概率水平的剪切波速測(cè)試誤差對(duì)地震動(dòng)影響的評(píng)價(jià)結(jié)果。
[Abstract]:Shear wave velocity is an important parameter in rock and soil media. Because of the intuitionistic test results and simple operation, the field shear wave velocity experiment has become one of the commonly used experiments in engineering. The error level and confidence interval are all the questions that must be answered, but so far the research on the field shear wave velocity measurement error is basically blank. This has led to a great controversy between engineering and scientific researchers on the accuracy of the existing shear wave velocity measurement technology. There are doubts about the reliability of the results, and it is impossible to formulate relevant standards and improve the technology. At the same time, the influence of wave velocity dispersion on ground motion is always an important research topic, but the error of wave velocity measurement is unknown. Previous studies can only use the assumed dispersion of wave velocity to study the effect of wave velocity on ground motion, which leads to the lack of basis for the results of the analysis. It is also impossible to evaluate the accuracy and technical level of the existing wave velocity experiment from the point of view of the influence of wave velocity on ground motion. In this paper, a special experiment of measuring error of shear wave velocity is designed in combination with engineering and scientific research work, and more systematic experimental results are obtained. The distribution of measurement error is modeled and evaluated, and the influence of the error on ground motion is calculated and analyzed by using the measured shear wave velocity measurement error. According to the statistical results, the influence degree of wave velocity measurement error at different probability levels on ground motion is evaluated. Through a lot of field work and calculation and analysis, the field shear wave velocity measurement error and its influence on ground motion are studied. The following work has been accomplished: 55 representative units in China have been organized, and a special experiment on the measurement error of field shear wave velocity has been completed for the first time on 20 different sites in 8 regions of mainland China. 600 sets of measured data are obtained. The data analysis shows that the test results are in accordance with the statistical theory, the experimental design is reasonable and the results are reliable. Through the measured data, the influence of test environment on the error of shear wave velocity measurement is analyzed. It is pointed out that the environmental noise of the experimental site is the most important one, and the dispersion and the soil property of the measurement of the wave velocity of the experimental site are larger than those of the experimental site. The distribution model of in-situ shear wave velocity measurement error is established and the statistical test is carried out. The distribution characteristics of the field shear wave velocity measurement error are given for the first time. An important conclusion is obtained that the error level of shear wave velocity measurement is basically equal for different site types and different testing depths, and a preliminary suggestion for evaluating the technical level of wave velocity testing is given. Through the measured data, it is studied that when different seismic waves are input, The influence of wave velocity measurement error on ground motion in different types of sites is presented, and the evaluation results of shear velocity measurement error at different probability levels on ground motion are presented using PGA and SI as indicators.
【學(xué)位授予單位】：中國(guó)地震局工程力學(xué)研究所
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU435

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 蘭景巖;劉紅帥;呂悅軍;彭艷菊;;表層土剪切波速的不確定性對(duì)地表設(shè)計(jì)譜平臺(tái)值的影響[J];吉林大學(xué)學(xué)報(bào)(地球科學(xué)版);2012年03期

2 蘇向前;劉康和;;面波法與單孔檢層法波速測(cè)試的工程應(yīng)用[J];長(zhǎng)江工程職業(yè)技術(shù)學(xué)院學(xué)報(bào);2006年03期

3 趙艷忍;;邢臺(tái)市剪切波速與標(biāo)準(zhǔn)貫入擊數(shù)的相關(guān)關(guān)系[J];城市勘測(cè);2009年03期

4 丁玉琴;張永興;;歐洲抗震設(shè)計(jì)規(guī)范Eurocode 8簡(jiǎn)介及其與我國(guó)巖土抗震設(shè)計(jì)比較[J];地震工程與工程振動(dòng);2010年05期

5 劉恢先;關(guān)于地震烈度及其工程應(yīng)用問(wèn)題[J];地球物理學(xué)報(bào);1978年04期

6 郝敏,謝禮立,徐龍軍;關(guān)于地震烈度物理標(biāo)準(zhǔn)研究的若干思考[J];地震學(xué)報(bào);2005年02期

7 詹晨曦;福州盆地土層剪切波速特征[J];福建建筑;2004年01期

8 高玉峰,劉漢龍,朱偉,顧長(zhǎng)存;剪切波速對(duì)砂土層地震反應(yīng)的影響[J];工程勘察;2001年01期

9 蘇旭;楊麗萍;鄒海寧;;西寧市區(qū)土層剪切波速隨深度變化特征[J];高原地震;2009年01期

10 王小龍;馬勝利;郭志;雷興林;夏英杰;郭欣;余國(guó)政;勾憲斌;蔣霞東;;利用地震背景噪聲成像技術(shù)反演三峽庫(kù)區(qū)及鄰近地區(qū)地殼剪切波速度結(jié)構(gòu)[J];地球物理學(xué)報(bào);2013年12期

相關(guān)博士學(xué)位論文 前5條

1 丁玉琴;場(chǎng)地非線性地震反應(yīng)分析方法及其應(yīng)用研究[D];重慶大學(xué);2010年

2 齊文浩;土層非線性地震反應(yīng)分析方法研究[D];中國(guó)地震局工程力學(xué)研究所;2008年

3 李偉;地震烈度表宏觀震害和地震動(dòng)參數(shù)研究[D];中國(guó)地震局工程力學(xué)研究所;2012年

4 盧建旗;多道面波分析方法及其應(yīng)用研究[D];中國(guó)地震局工程力學(xué)研究所;2013年

5 劉莎;利用剪切波分裂方法研究玉樹和冰島地區(qū)各向異性[D];中國(guó)地震局地球物理研究所;2013年

相關(guān)碩士學(xué)位論文 前2條

1 李敏;地震動(dòng)加速度反應(yīng)譜與地震烈度的關(guān)系研究[D];中國(guó)地震局工程力學(xué)研究所;2010年

2 劉宇;剪切波速的不確定性對(duì)設(shè)計(jì)地震動(dòng)參數(shù)的影響[D];中國(guó)地震局工程力學(xué)研究所;2013年

，

本文編號(hào)：1534682