本文選題：土力學(xué) + 加筋擋土墻　； 參考：《巖石力學(xué)與工程學(xué)報(bào)》2017年06期

【摘要】：基于受靜載和循環(huán)荷載作用的基礎(chǔ)下加筋擋墻模型試驗(yàn),綜合對(duì)比分析了基礎(chǔ)位置、荷載大小、頻率和循環(huán)次數(shù)等因素對(duì)加筋擋墻力學(xué)與變形性能的影響。試驗(yàn)結(jié)果表明:(1)以基礎(chǔ)極限承載力為標(biāo)準(zhǔn),確定基礎(chǔ)最佳偏移距離為0.3H(墻高);(2)基礎(chǔ)沉降和擋墻水平位移隨荷載、頻率和循環(huán)次數(shù)的增加而增加,當(dāng)基礎(chǔ)受靜載且達(dá)到極限承載力前,沉降與墻高比均小于2%,擋墻水平位移與墻高比均小于1%;當(dāng)基礎(chǔ)受循環(huán)荷載時(shí),增加循環(huán)荷載水平和頻率使初始階段基礎(chǔ)沉降和擋墻水平位移增加明顯,但隨循環(huán)次數(shù)增加而變形收斂;(3)緊鄰基礎(chǔ)下方的筋材應(yīng)變顯著高于其他層,且循環(huán)荷載水平越高,循環(huán)次數(shù)增多時(shí)筋材應(yīng)變?cè)龇@著;(4)靜載時(shí)擋墻破壞隨基礎(chǔ)偏移距離增加而由初始頂層面板被擠出,逐漸過(guò)渡到破壞面沿基礎(chǔ)邊緣并向擋墻深部發(fā)展的剪切破壞為主;當(dāng)基礎(chǔ)受循環(huán)荷載且頻率較小時(shí),頂層面板以擠出變形為主,增加荷載水平和頻率,擋墻以中部面板擠出破壞為主。
[Abstract]:Based on the model test of reinforced retaining wall under static load and cyclic load, the effects of foundation position, load size, frequency and cycle times on the mechanical and deformation properties of reinforced retaining wall are compared and analyzed. The test results show that the settlement of foundation and horizontal displacement of retaining wall increase with the increase of load, frequency and cycle times, according to the ultimate bearing capacity of foundation, the optimum deviation distance of foundation is 0.3H, and the horizontal displacement of retaining wall is increased with the increase of load, frequency and cycle frequency. When the foundation is subjected to static load and reaches the ultimate bearing capacity, the ratio of settlement to wall height is less than 2, the horizontal displacement of retaining wall to wall height is less than 1, and when the foundation is subjected to cyclic load, the ratio of horizontal displacement to wall height is less than 1. With the increase of cyclic load level and frequency, the settlement of foundation and horizontal displacement of retaining wall increase obviously in the initial stage, but the deformation converges with the increase of cycle times. (2) the strain of steel bar adjacent to the foundation is significantly higher than that of other layers, and the level of cyclic load is higher than that of other layers. When the number of cycles increases, the strain increment of steel bar is significant (4) at static load, the failure of retaining wall is extruded from the initial top face to the shear failure along the edge of the foundation and to the deep part of the retaining wall with the increase of foundation offset distance. When the foundation is subjected to cyclic load and the frequency is small, the top floor slab is mainly extruded deformation, and the load level and frequency are increased.
【作者單位】： 河北工業(yè)大學(xué)土木與交通學(xué)院;河北工業(yè)大學(xué)河北省土木工程技術(shù)研究中心;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(50909032) 河北省自然科學(xué)基金資助項(xiàng)目(E2014202038)~~
【分類號(hào)】：TU476.4

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