duncan chang model 中文意思是什麼
duncan chang model
解釋
鄧肯 張模型-
Based on total stress index of property of statics and dynamics of dam body and dam base materials which obtained from test, utilizing duncan - chang hyperbola model and equipollence linearity model to analysis static state and dynamic stress state affected by earthquake of hada mountain dam body and dam base
根據試驗得到的壩體和壩基材料的靜動力學性質的總應力指標，計算中採用duncan ? chang雙曲線模型和等效線性模型，分析了哈達山壩體和壩基的靜應力狀態以及它們在地震作用下的動應力狀態。 -
Utilizing pseudo - static method theory, calculated the safety factor for the dam slope, give, a primary conclusion. utilizing static finite element method based on duncan - chang hyperhola modelfound the static stress riele, make the foundation for hynamical finite element analysis. utilizing dynamical finite element method based on equipollence linearity model, found the dynamical stress field and the acceleration field, make the foundation for calculated the safety factor of the dam slop with finite element method
運用擬靜力法的基本原理，對滿拉堆石壩的壩坡穩定進行了分析研究，得出了初步結論；採用duncan - chang雙曲線模型，用計算土石壩應力及變形的靜力有限元程序，對滿拉堆石壩進行了靜力有限元分析，得到了壩體的靜應力場分佈，為動力有限元計算打下基礎。 -
Stress and deformation of computational analysis is usually not in conformity with actually observed data due to this reason in fem analysis of earth dam and crfd such as the extensively applied duncan - chang hyperbolic model, and many other models also equally have similar problem
如應用廣泛的duncan ?張模型在土壩、面板壩有限元應力變形計算分析中就存在與實際觀測值不一致、不合理的結果，許多模型也同樣存在類似的問題。 -
Analysis of parameters sensitivity of duncan - chang model
張模型參數敏感性分析 -
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固結狀態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；從微分方程推導了基於土體振動臺模型試驗的相似律，並從模型實體、孔壓時程曲線和相似律等方面做出了分析，得出了如下結論：在小型振動臺試驗中，模型箱中的粉土都發生了液化，液化的時刻和輸入加速度幅值有關，而對頻率的變化不太敏感；粉土在相當於8 9度地震烈度的加速度幅值作用下可能產生嚴重的液化；孔壓的增長曲線形狀與施加的荷載有關：當施加荷載為由小到大的形式時，曲線形狀為上凹的曲線；當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，且逐漸趨于穩定。 -
According to the special stratum condition 、 soil parameter 、 pile frame system in the protecting landslide of hongtian jianfeng in yongan city in fujian province, compile a fem program of plane strain and analyze the interaction by nonlinear fem on intensity discount. in the program, duncan - chang model is applied to earth, elasticity model is applied to pile and rock ; goodman element is set between pile and rock - earth and applied to simulate sliding plane and flexible floor ; sequential pole elements with original stress are applied to anchor cable
在程序中土體採用了duncan - chang雙曲線本構模型，樁和錨固層以下的巖體採用了線彈性本構模型，並且在樁和巖土體間設置了無厚度的古德曼（ goodman ）單元，對于軟弱夾層和已知的滑裂面也採用古德曼單元模擬，錨索採用的是具有初始應力的連續桿單元模擬。 -
To meet the need of settlement calculation with fem when absence of laboratory triaxial test data in common road engineering, methods of determining the five parameters included in tangential elastic module through soil routine tests and the related emendation coefficient are given. at the same time, one approximately substituted formula for tangential poisson ratio is also developed, which is suitable for both sandy soil and cohesive soil. ( 3 ) research on main parameters modification of duncan - chang model based on the improved bp network
對於一般道路工程中不做三軸試驗但須進行沉降有限元計算的情況，給出了依據土體常規試驗的切線彈性模量確定方法和相關修正系數，同時也提出了對砂性土和粘性土均適用的切線泊松比的近似替代式子； （ 3 ）基於改進的bp網路對鄧肯張模型主要參數修正研究。 -
This program includes soil element, reinforcement element, goodman element and pile element etc. in the program, duncan - chang model was applied to earth, which can consider the nonlinear relation between the stress and strain
該程序包括了土體單元、加筋體單元、接觸面單元和樁體單元。其中土體採用了duncan ? chang雙曲線本構模型，可以考慮土的應力-應變的非線性特徵。 -
The reference values of strength parameters of the grounds and rock - fillers of the high rock - filled embankment on liuzhai - shuien highway in guangxi are obtained in this paper by synthetically analyzing the construction technology at home and abroad and indoor rock tests. by comparing the analysis method of settlement laws and thoroughly analyzing the datum of the embankment settlements of liuzhai - shuiren highway from the whole cons truction period, a new method generated from expectation technology to analyze the embankment settlement laws, " compete " growth curve, is presented in this paper and the result tallies with the observation data. for there are shortcomings in indoor rock tests, in this paper by combining finite element method with duncan - chang nonlinear constitutive model and composite method, a method for back analysis of the strength parameters of rock fillers is presented with a corresponding program, which has been successfully applied
通過對國內外已有高填石路堤修築資料的綜合分析及室內巖石試驗，獲得了寨任二級公路高填石路堤地基及填料強度參數的參考值；通過對路堤沉降發展規律現有分析方法的比較及對廣西寨任二級公路高填石路堤修築工程中的沉降全過程觀測資料深入分析，運用預測技術，提出了路基及路堤沉降發展規律分析的「龔帕斯」成長曲線分析方法；針對室內巖石試驗的局限，運用有限元技術，結合鄧肯一張非線性本構模型和復形調優法，提出了高填石路堤填石料強度參數的反演方法，開發了相應的反演分析程序，並成功地反演了廣西寨任二級公路高路堤填石料的強度參數值。 -
( 3 ) fem basic theory of foundation pit excavation stimulation is expounded, numerical model and method of construction simulation are determinated, which includes simplification of two - dimension problem and constitutive model of soil mass i. e. constitutive model of duncan - chang hyperbola model, numerical ways of initial situ stress, stimulation of equal nodal load of foundation pit excavation, nonlinear solutions of basic equations, fem disposing of inner supporting and pre - axial force etc. further fem code of stimulation of foundation pit excavation is compiled
闡述了基坑開挖模擬的有限元基本理論，確定計算模型及施工模擬方法。包括二維問題的簡化、土體的本構模型，即鄧肯-張雙曲線本構模型、初始地應力場的計算方法、基坑開挖等效結點荷載模擬、基本方程的非線性解法、內支撐及預加軸力的有限元處理等，並編制了模擬基坑開挖的有限元程序。 -
Therefore, study on dynamic properties of cement mixed pile foundations and the soil structure interaction during earthquakes is of great theoretical and practical importance in seismic design. this dissertation studies the static and dynamic properties of cemented composite foundations systematically through tests and parameters of duncan - chang model and hardin - drnevich model are generalized. the seismic acceleration is conversed and used as input acceleration through nonlinear method
本文通過試驗系統地研究了水泥攪拌樁復合地基的靜力和動力特性，得到了復合地基的靜力duncan ? chang模型參數和hardin ? drevich非線性彈性動力模型參數，採用非線性方法對地震加速度進行了反演並將之作為基巖輸入加速度。 -
In the third engineering case, the author separately adopted duncan - chang model and linear elastic model. compared their results with the measured results, the author found that the duncan - chang model is more suitable to evaluate the settlement of soft ground
本文第三個實例分別採用了duncan - chang非線性模型和線彈性模型計算，將其計算結果與實測資料進行比較，結果證明用非線性模型比較符合工程實際。 -
Improvement of duncan - chang nonlinear model and shen zhujiang ' s elastoplastic model for granular soils
張模型和沈珠江雙屈服面模型的改進 -
Comparison of several methods for improving duncan - chang model
張模型幾種改進方法的比較 -
Three kinds of soil constitutive law, namely, duncan - chang model, modified cam - clay model, d - p model could be considered in this program
程序中可以考慮三種巖土本構關系，即d - p模型、 duncan - chang模型、修正的劍橋模型。 -
Duncan - chang model, an non - linear elastic model, is widely used in engineering. because the model reflects the main rules of the deformations of soils, and parameters can be gained from triaxial tests
由於鄧肯?張模型反映了土體變形的主要規律並且其各項參數易於從常規三軸試驗求得而在工程實踐中被廣泛應用。 -
The forward - analysis method is finite element method. by some software i realize the forward - analysis calculation, and realize the calculation of duncan - chang model. it ' s feasible to execute displacement back - analysis by genetic algorithms by engineering example
正演方法採用數值方法中的有限單元法，用現在應用廣泛的有限元計算軟體進行正演計算，並首次在ansys實現了對土的非線性彈性模型的計算。 -
The static triaxial test is performed on composite cemented clay samples and parameters of duncan - chang model are obtained considering the effects of replacement ratio and confining pressure. the effects such as replacement ratio, strain amplitude and confining pressure on the dynamic modulus and damping ratio of composite cemented clay samples are analyzed through undrained dynamic triaxial test. fitting equations estimating the dynamic modulus and damping ratio through regression analysis are deducted with the effects of replacement ratio, strain amplitude and confining pressure
通過不排水動三軸試驗詳細地分析了置換率、應變幅和圍壓等因素對水泥土復合試樣動模量和阻尼比的影響，根據有關數據，得到了較為完整的復合試樣的動力變形曲線，通過回歸分析方法，得到了考慮置換率，應變幅和圍壓影響的水泥攪拌樁復合試樣動模量和阻尼比的擬合公式。 -
This thesis, based on the true three - dimension consolidation theory namely biot ' s consolidation theory, adopting duncan - chang model and non - thickness goodman friction element, compiles practical 3d non - linear fem program. the conceptual geological model is established according to the north anchorage and feature of its foundation soil in zhenjiang - yangzhou yangtse bridge
本文從「真三維固結理論」即比奧固結理論出發，採用鄧肯-張e模型和無厚度的古德曼（ goodman ）接觸面單元編制了三維非線性有限元程序實用程序biot2000 ，並結合潤揚長江公路大橋南汊橋北錨碇及地基土的組成結構特徵建立了概化地質模型。 -
Based on the duncan - chang e - b model, which can simulate earth - rock dam ' s non - linear mechanics behavior well, the paper introduced the nature coordinate system to the stress space. in this way, hydrostatic stress and stress deviator were decomposed each other. therefore, a partial derivative formulation about displacement and parameter in finite element evaluation was derived in a closed form
論文以能較好模擬土石壩非線性力學行為的duncan - change - b模型為基礎，通過引入應力空間下的自然坐標系，分解應力球量與應力偏量，從而導出一個在有限元計算中，位移對參數偏導數的閉合形式公式。
分享友人