ratio n. (pl. ratios) 1.比,比率,比值;比例;系數(shù)。 2.【經(jīng)濟學(xué)】復(fù)本位制中金銀的法定比價。 the ratio 3:2 (讀作 the ratio of three to two )3對2之比。 arithmetical ratio 公差,算術(shù)比。 direct ratio 正比。 inverse [reciprocal] ratio反比。 current ratio 電流比,電流變換系數(shù)。 nutritive ratio 營養(yǎng)率。 vt. 1.用比例方式表達;求出…的比值;使…成比例。 2.將(相片)按比例放大或縮小。
It presents the method of “ stiffness similarity ” , which has solved the design problem of model with difference of elastic modulus ratio in different parts between model and practicality 提出了“剛度相似”的方法,有效地解決了模型與實型各部分結(jié)構(gòu)彈性模量相似比不一致的模型設(shè)計問題。
The foundation of baise gravity dam has bad geological phenomena such as high elastic modulus ratio , joint fissures and large faults etc . , so stability of baise gravity dam is the essential technical problem to project ' s success 百色重力壩地質(zhì)條件復(fù)雜,地基巖體具有高模量比、節(jié)理裂隙發(fā)育等不良地質(zhì)現(xiàn)象。百色重力壩的穩(wěn)定性是事關(guān)工程成敗的關(guān)鍵技術(shù)問題。
The dynamical parameter was regarded as evaluation guideline , and through investigating the change characteristic of the basin and modulus under different destroy boards , different area and different level loads , the identify methods of the pavement bursted have been given and we advise to use synthesize modulus ratio to evaluate the pass - loads capacity of the joints . we have also discussed the influence of different level loads to the joints pass - loads capability , and confirmed the commonness and oneness of the influence of the pass - loads and bursted to the basin and modulus under the critical loads , and the range of the critical loads was also given . basing on the determination of the pass - loads a 以動態(tài)參數(shù)作為評價指標(biāo),通過研討不同破壞板的不同區(qū)域,在不同等級荷載作用下彎沉、模量的變化特性,提出了路面脫空識別辦法以及利用綜合模量比來評價接縫傳荷能力的思想,探討了不同等級荷載對接縫傳荷能力的影響特性,確定了臨界荷載下傳荷與脫空對彎沉、模量影響的共性和單一性,并確定了臨界荷載的范圍,在判定脫空和傳荷基礎(chǔ)上提出了水泥混凝土路面的壓漿效果的評價方法,通過研討荷載與動態(tài)模量的關(guān)系,對地基的動態(tài)性能進行了系統(tǒng)的分析與評價。
Meanwhile , dynamic responses at pile head are investigated . it is sh own that the effects of pile slenderness , bearing stiffness of pile toe and the pile - soil modulus ratio on pile impedance are major whereas the ones of the permeability and the soil reaction coefficient are minor 對影響樁振動特性的主要因素進行了分析,結(jié)果表明,長徑比、樁土模量比及樁底支承系數(shù)對樁的動力響應(yīng)影響顯著,而滲透系數(shù)作為飽和土的一個重要參數(shù),由于荷載作用時間問題,對樁的動力響應(yīng)影響較小。
Considering the similitude law for shaking table test , we study the test results and obtain some conclusions which are a ) generally , the silty soil in test box liquefies and the liquefied time has relation with the amplitude of acceleration , b ) when the intensity is on and above eight degree , the silty soil deposit will be liquefied dramatically , c ) the relationship of the pore water pressure is relevant to the cycle loading which represents when the cycle loading ranges from little to great , the relationship is represent as a concave curve , or else as a protruding curve and tends to stability . ( 3 ) based on the triaxial compression test and the resonant column test , some studies are made such as a ) the duncan - chang parameters of constitutive model , b ) the dynamic shear modulus ratio and c ) the damping ratio of the site soil deposits . in order to deal with the test data , a computer program is compiled ( 2 )利用小型振動臺進行了k _ 0固結(jié)狀態(tài)下粉土的振動液化模擬研究,通過分析正弦荷載作用下的試驗資料,驗證了粉土的孔隙水壓力增長模式的合理性;從微分方程推導(dǎo)了基于土體振動臺模型試驗的相似律,并從模型實體、孔壓時程曲線和相似律等方面做出了分析,得出了如下結(jié)論:在小型振動臺試驗中,模型箱中的粉土都發(fā)生了液化,液化的時刻和輸入加速度幅值有關(guān),而對頻率的變化不太敏感;粉土在相當(dāng)于8 9度地震烈度的加速度幅值作用下可能產(chǎn)生嚴重的液化;孔壓的增長曲線形狀與施加的荷載有關(guān):當(dāng)施加荷載為由小到大的形式時,曲線形狀為上凹的曲線;當(dāng)施加荷載為等幅的正弦荷載或荷載幅值由大到小時,曲線形狀為上凸的曲線,且逐漸趨于穩(wěn)定。
The experiential formula between kc and base resistance q from cpt and , the relationship between ke and c # ( strength of concrete ) are also created by fitting 94 pressed pile testing date . based on analyzing the compacting effects caused by driving pile in loess and it ' s influence on bearing capacity and settlement , another two disturbance parameters , c and e , are proposed for multiplying respectively the parameters of soil cohesive c and deformation modulus es to reflect this effect . by fitting 51 driven pile testing date , we created an experiential formula between the e and r ( the modulus ratio between pile and surrounding soil ) , also an experiential formula between the c and base friction resistance fs / pa from cpt of pile surrounding soil 在本文中分析了靜壓樁的沉樁擠土效應(yīng)對其承載力與沉降特性的影響,在計算模型中引入了樁周土粘聚力c的修正系數(shù)k _ c和樁周土變形模量e _ s的修正系數(shù)k _ e來體現(xiàn)這種影響,通過對94根靜壓樁試樁資料進行擬合,建立了k _ c與樁端土靜力觸探的端阻q _ c之間經(jīng)驗公式以及k _ e與c # (混凝土標(biāo)號)之間的對應(yīng)關(guān)系。
Then displacement fields are researched via the finite element model that accords with actual process of jacked pile . and the effects of displacement fields caused by difference modulus ratio , friction between pile and soil , possion ration of soil and soil index of c and are put forward 接著建立了能夠模擬沉樁連續(xù)貫入的有限元模型,利用該有限元模型分析了樁土模量比、樁土界面接觸剛度、樁土界面摩擦、泊松比以及土體的c和指標(biāo)等因素對沉樁擠土效應(yīng)的影響。
The influences of soil structure , confining pressure and strain amplitude on dynamic properties of recently deposited soils of nanjing and its surrounding areas are discussed . furthermore , based on test results and theoretical analysis , the averaging curves , recommended values and envelopes of dynamic shear modulus ratio ggmax and damping ratio versus dynamic strain for recently deposited soils of nanjing and its surrounding areas are presented . by use of vibration triaxial apparatus , nanjing silty clay and fine sand interbedded strata and nanjing fine sand were tested and their test results are discussed 通過自振柱試驗,探討了土的結(jié)構(gòu)性、有效圍壓和應(yīng)變幅值大小對動荷載作用下南京及其鄰近地區(qū)新近沉積土的動剪切模量、阻尼比和應(yīng)力?應(yīng)變關(guān)系的影響;通過試驗和理論分析,給出了南京及其鄰近地區(qū)的粘土、淤泥質(zhì)粉質(zhì)粘土、粉質(zhì)粘土、粉質(zhì)粘土與粉砂互層土、粉土以及砂土等六類新近沉積土中典型土類的動剪切模量比和阻尼比隨剪應(yīng)變幅值變化的平均曲線、包絡(luò)線和推薦值。