本文選題：地震動(dòng)土壓力　切入點(diǎn)：水平層分析法　出處：《中南大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：摘要：擋土墻是現(xiàn)實(shí)工程中應(yīng)用最廣的特種結(jié)構(gòu)之一,被廣泛的用于民用建筑、公路工程、橋梁工程、水利港口工程、鐵路工程中。在地震中擋土墻的破壞普遍存在且形式多樣,損壞的擋土墻不僅危及人民生命,更嚴(yán)重的會(huì)阻塞交通,給震后救援帶來難度。擋土墻的抗震設(shè)計(jì)一直是國內(nèi)外相關(guān)學(xué)者研究的課題之一。物部-岡部公式是擋土墻抗震設(shè)計(jì)中計(jì)算動(dòng)土壓力的常用方法,M-O公式的許多假設(shè)條件使得它的使用范圍有限,且不能得到地震土壓力的合力作用位置以及土壓力強(qiáng)度分布情況。 本文采用旋轉(zhuǎn)擋土墻的計(jì)算方法,將地震作用下求解擋土墻主動(dòng)和被動(dòng)土壓力的問題轉(zhuǎn)換成在靜力條件下主、被動(dòng)土壓力的求解問題,采用水平層法分析原理,求得了地震作用下主、被動(dòng)土壓力強(qiáng)度分布、動(dòng)土壓力的合力及墻背作用點(diǎn)高度的解析式,采用圖解法原理獲得了臨界破裂角的解析解。計(jì)算模型中考慮了豎向和水平地震加速度、填土與墻背之間存在粘聚力及摩擦角、填土表面存在均布超載、墻背傾角、填土粘聚力等諸多因素的影響,公式適用于常規(guī)邊界條件和地震作用下粘性土和非粘性土的主、被動(dòng)土壓力求解。案例分析結(jié)果表明,在簡化條件下本文所得到的公式與M-O公式相同。 根據(jù)適當(dāng)假設(shè)條件,對(duì)采用旋轉(zhuǎn)擋土墻墻法所得到的地震土壓力計(jì)算式進(jìn)一步簡化,得出了計(jì)算地震土壓力的簡化計(jì)算式,汾析結(jié)果驗(yàn)證了簡化計(jì)算式的適用性,旋轉(zhuǎn)擋土墻法簡化了主、被動(dòng)地震土壓力計(jì)算式的推導(dǎo)過程,統(tǒng)一了擋土墻地震土壓力求解。
[Abstract]:Abstract: retaining wall is one of the most widely used special structures in practical engineering. It is widely used in civil construction, highway engineering, bridge engineering, water conservancy and port engineering. In railway engineering, the destruction of retaining walls in earthquakes is widespread and varied in form. The damaged retaining walls not only endanger people's lives, but also block traffic more seriously. Seismic design of retaining wall has always been one of the topics studied by scholars at home and abroad. Object-Okangbu formula is a common method of calculating dynamic earth pressure in seismic design of retaining wall and many false formulas of M-O formula are used in seismic design of retaining wall. Set conditions so that its use is limited, The position of the earth pressure and the distribution of the earth pressure intensity can not be obtained. In this paper, the problem of active and passive earth pressure of retaining wall under seismic action is transformed into the solution of active and passive earth pressure under static condition by using the calculation method of rotating retaining wall, and the principle of horizontal layer analysis is adopted. The analytical expressions of the intensity distribution of active and passive earth pressure, the resultant force of dynamic earth pressure and the height of the action point on the back of the wall under earthquake action are obtained. The analytical solution of critical fracture angle is obtained by using the principle of graphic method. The vertical and horizontal seismic acceleration is considered in the calculation model, the cohesive force and friction angle exist between the fill and the back of the wall, the surface of the fill is overloaded, and the inclination angle of the wall back is considered. The formula can be used to solve the active and passive earth pressure of cohesive soil and non-cohesive soil under conventional boundary conditions and seismic action. Under the simplified condition, the formula obtained in this paper is the same as that of M-O formula. On the basis of proper assumptions, the formula for calculating seismic earth pressure obtained by using the method of rotating retaining wall is further simplified, and the simplified formula for calculating seismic earth pressure is obtained. The result of analysis verifies the applicability of the simplified formula. The method of rotating retaining wall simplifies the calculation process of active and passive seismic earth pressure and unifies the solution of seismic earth pressure of retaining wall.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU476.4;TU432

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 楊劍;;擋土墻地震被動(dòng)土壓力的擬動(dòng)力分析[J];防災(zāi)減災(zāi)工程學(xué)報(bào);2012年03期

2 周健,董鵬,池永;軟土地下結(jié)構(gòu)的地震土壓力分析研究[J];巖土力學(xué);2004年04期

3 陳學(xué)良;陶夏新;陳憲麥;周曉巖;袁一凡;;重力擋土墻地震反應(yīng)研究評(píng)述[J];自然災(zāi)害學(xué)報(bào);2006年03期

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本文編號(hào)：1579000