重塑土的動(dòng)力特性及其對(duì)地震動(dòng)的影響
[Abstract]:Earthquakes make the ground shake or even move, and often accompanied by geological disasters, its potential damage will have a serious impact on people's lives at the beginning of the 20th century, scholars at home and abroad through the earthquake research found, The effect of soil conditions on ground motion is significant. With the accumulation of a great deal of seismic damage data and the deepening of theoretical research, it is proved that the damage degree of earthquake disaster is closely related to the dynamic characteristics of soil. The dynamic characteristics of soil are reflected by two parameters: dynamic shear modulus and damping ratio, which are also the key of soil seismic response analysis and site safety assessment. At present, the research on dynamic shear modulus and damping ratio of undisturbed soil has been relatively mature, and the research results on dynamic parameters of remolded soil are relatively few. In this paper, the dynamic parameters of clay, silty soil and silty sand are determined by resonance column test combined with the project of site safety evaluation. According to the experimental results, the dynamic characteristics of remolded soil and undisturbed soil and their effects on ground motion were studied. 1) Resonance column tests were carried out on four types of remolded soil and undisturbed soil, namely, clay, silty clay, silt and silt, respectively. The relationship curves of maximum dynamic shear modulus, dynamic shear modulus ratio and shear strain, damping ratio and shear strain of remolded soil and undisturbed soil are presented. The dispersion degree of the maximum dynamic shear modulus relative difference of silty clay is larger than that of clay, and the dispersion of silt and silt is larger than that of clay, generally speaking, the dispersion degree of the four soils is not different. The relative dispersion of the dynamic shear modulus ratio of clay is larger than that of silty clay, silt and silt. The factors affecting the dynamic parameters of remolded soil and undisturbed soil are analyzed. Among these influencing factors, the difference of mineral composition, the structural difference and the influence of sample size are difficult to control, but the difference of granulation content, The influence of test operation and the effect of sample preparation. These three items can be improved in future tests, thus reducing the difference in dynamic parameters between remolded soil and undisturbed soil. 3) by studying the effect of consolidation time on clay and silty clay, The effect of consolidation time on the maximum dynamic shear modulus, the ratio of dynamic shear modulus to shear strain curve of remolded soil is proposed, and the influence of consolidation time on the dynamic characteristics of remolded soil is obvious. The results show that the maximum dynamic shear modulus of remolded soil increases with the extension of consolidation time, and the dynamic shear modulus ratio increases with the extension of consolidation time. The effects of dynamic shear modulus ratio of remolded soil and undisturbed soil on the peak acceleration of the surface, the response spectrum of the surface acceleration and the characteristic period of the surface response spectrum are analyzed. The dynamic shear modulus is different from the nonlinear part. The peak value of the ground acceleration calculated by the undisturbed soil value is larger than that of the remolded soil value, while the average characteristic period of the undisturbed soil value is smaller than that of the remolded soil value. The relative difference of ground motion parameters calculated by the two methods varies with the thickness of soil layer and the magnitude of earthquake.
【學(xué)位授予單位】:黑龍江大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類號(hào)】:TU435
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 陳國(guó)興;王炳輝;孫田;;飽和南京細(xì)砂動(dòng)剪切模量特性的大型振動(dòng)臺(tái)試驗(yàn)研究[J];巖土工程學(xué)報(bào);2012年04期
2 袁燦勤;;現(xiàn)場(chǎng)波速試驗(yàn)地基土的動(dòng)剪切模量[J];江蘇地質(zhì);1991年01期
3 陳國(guó)興;劉雪珠;朱定華;胡慶興;;南京新近沉積土動(dòng)剪切模量比與阻尼比的試驗(yàn)研究[J];巖土工程學(xué)報(bào);2006年08期
4 陳國(guó)興;王炳輝;劉建達(dá);;新近沉積土的動(dòng)剪切模量和阻尼比試驗(yàn)研究[J];地下空間與工程學(xué)報(bào);2008年03期
5 孫銳;陳紅娟;袁曉銘;;土的非線性動(dòng)剪切模量比和阻尼比不確定性分析[J];巖土工程學(xué)報(bào);2010年08期
6 孫靜;袁曉銘;孫銳;;固結(jié)比對(duì)土最大動(dòng)剪切模量的影響[J];世界地震工程;2010年S1期
7 李永強(qiáng);景立平;梁海安;任長(zhǎng)青;;土體動(dòng)剪切模量測(cè)定及非線性擬合方法研究[J];世界地震工程;2010年S1期
8 張向東;馮勝洋;張建俊;;遼西風(fēng)積土動(dòng)剪切模量與阻尼比特性試驗(yàn)研究[J];力學(xué)與實(shí)踐;2011年01期
9 戰(zhàn)吉艷;陳國(guó)興;楊偉林;胡慶興;;蘇州第四紀(jì)沉積土動(dòng)剪切模量比和阻尼比試驗(yàn)研究[J];巖土工程學(xué)報(bào);2012年03期
10 楊傳成;王冬雷;;渤海海底土類動(dòng)剪切模量比和阻尼比試驗(yàn)研究[J];國(guó)際地震動(dòng)態(tài);2012年06期
相關(guān)會(huì)議論文 前10條
1 陳紅娟;孫銳;袁曉銘;郭恩;;不同概率水準(zhǔn)下粘土動(dòng)剪切模量比對(duì)地震動(dòng)的影響[A];第八屆全國(guó)地震工程學(xué)術(shù)會(huì)議論文集(Ⅰ)[C];2010年
2 楊傳成;王冬雷;;渤海海底土類動(dòng)剪切模量比和阻尼比試驗(yàn)研究[A];中國(guó)地震學(xué)會(huì)第14次學(xué)術(shù)大會(huì)專題[C];2012年
3 孫靜;袁曉銘;陶夏新;;室內(nèi)和現(xiàn)場(chǎng)測(cè)試最大動(dòng)剪切模量差別的試驗(yàn)研究[A];第六屆全國(guó)防震減災(zāi)工程學(xué)術(shù)研討會(huì)論文集(Ⅰ)[C];2012年
4 蔡輝騰;;結(jié)構(gòu)性軟土動(dòng)剪切模量試驗(yàn)對(duì)比研究[A];2012年海峽兩岸破壞科學(xué)/材料試驗(yàn)學(xué)術(shù)會(huì)議論文摘要集[C];2012年
5 孫田;陳國(guó)興;周恩全;李小軍;;深層海床粉質(zhì)黏土動(dòng)剪切模量和阻尼比試驗(yàn)研究[A];第六屆全國(guó)防震減災(zāi)工程學(xué)術(shù)研討會(huì)論文集(Ⅰ)[C];2012年
6 陳國(guó)興;劉雪珠;朱定華;王炳輝;胡慶興;;江蘇長(zhǎng)江以南地區(qū)新近沉積土動(dòng)剪切模量比與阻尼比研究[A];第三屆全國(guó)防震減災(zāi)工程學(xué)術(shù)研討會(huì)論文集[C];2007年
7 孔憲京;韓國(guó)城;;微小應(yīng)變測(cè)試技術(shù)及堆石壩壩料的動(dòng)剪切模量與阻尼比[A];土石壩與巖土力學(xué)技術(shù)研討會(huì)論文集[C];2001年
8 陳國(guó)興;劉雪珠;朱定華;王炳輝;胡慶興;;江蘇長(zhǎng)江以南地區(qū)新近沉積土動(dòng)剪切模量比與阻尼比研究[A];第三屆全國(guó)防震減災(zāi)工程學(xué)術(shù)研討會(huì)論文集[C];2007年
9 高志兵;譚慧明;陳佳;;不同試驗(yàn)最大動(dòng)剪切模量對(duì)場(chǎng)地地震反應(yīng)影響研究[A];第六屆全國(guó)防震減災(zāi)工程學(xué)術(shù)研討會(huì)暨第二屆海峽兩岸地震工程青年學(xué)者研討會(huì)論文集(Ⅱ)[C];2012年
10 張國(guó)棟;金星;李勇;;垃圾土動(dòng)剪切模量和阻尼特性及影響因素分析[A];第二屆全國(guó)環(huán)境巖土工程與土工合成材料技術(shù)研討會(huì)論文集(二)[C];2008年
相關(guān)博士學(xué)位論文 前2條
1 于嘯波;季節(jié)凍土動(dòng)剪切模量阻尼比試驗(yàn)研究[D];中國(guó)地震局工程力學(xué)研究所;2016年
2 孫靜;巖土動(dòng)剪切模量阻尼試驗(yàn)及應(yīng)用研究[D];中國(guó)地震局工程力學(xué)研究所;2004年
相關(guān)碩士學(xué)位論文 前10條
1 劉紫韋;雙向振動(dòng)作用下頻率對(duì)黃土動(dòng)力特性的影響研究[D];西北農(nóng)林科技大學(xué);2015年
2 張希棟;雙向動(dòng)荷載作用下黃土的動(dòng)變形特性試驗(yàn)研究[D];西北農(nóng)林科技大學(xué);2015年
3 黃邦文;川西非飽和混合土動(dòng)剪切模量和阻尼比分析[D];西南交通大學(xué);2015年
4 李普;地震荷載下水泥土動(dòng)力特性試驗(yàn)研究[D];西北農(nóng)林科技大學(xué);2016年
5 王帥;重塑土的動(dòng)力特性及其對(duì)地震動(dòng)的影響[D];黑龍江大學(xué);2016年
6 毛浩燃;砂土共振柱動(dòng)力特性研究[D];浙江海洋大學(xué);2016年
7 王志杰;復(fù)雜初始應(yīng)力狀態(tài)下黃土動(dòng)剪切模量與阻尼比特性試驗(yàn)研究[D];西北農(nóng)林科技大學(xué);2010年
8 王紹鵬;土體動(dòng)彈性模量與動(dòng)剪切模量關(guān)系對(duì)比研究[D];大連理工大學(xué);2009年
9 陳紅娟;土動(dòng)力非線性的變異性及其對(duì)地震動(dòng)影響的概率分析[D];中國(guó)地震局工程力學(xué)研究所;2009年
10 王志佳;土及巖石動(dòng)力學(xué)參數(shù)的統(tǒng)計(jì)與分析[D];西南交通大學(xué);2012年
,本文編號(hào):2228049
本文鏈接:http://sikaile.net/kejilunwen/diqiudizhi/2228049.html