creep of steel 中文意思是什麼
creep of steel
解釋
鋼筋徐變-
The calculation modes of the coefficient of shrinkage and creep of the bulgy core concrete in steel tube are discussed. based on a few reasonable hypotheses and the stress - strain relation of concrete acquired by the " adjusting valid modulus depending on load time " method, a compact formula is reasoned out, which is applied to calculate the equivalent elastic modulus of the bulgy core concrete considering the affection of shrinkage and creep. so, the analysis of the affection on cfst arch bridge by shrinkage and creep can be progressed by pole - girder fem, further more, the analysis precision is quite high
本文還對核心膨脹混凝土特殊的收縮、徐變系數計算模式展開了探討，在合理的假設前提下，採用「齡期調整的有效模量法」得到的混凝土的本構關系，推導出鋼管內核心混凝土在考慮徐變影響后的等效彈性模量計算公式，並以此為基礎採用桿系有限元方法來對鋼管混凝土拱橋進行較高精度的收縮徐變分析。 -
In the paper, not only such factors as reinforcing steel bar, various placing temperature of concrete in case of lift placements, lift thickness, time interval between lifts, the variation of elastic modules of concrete, heat of hydration, the temperature changes of environment but the effect of creep deformation and autogenous volume change on the temperature field and thermal stress field of reinforced concrete face - slab are considered
本論文在分析中，考慮了鋼筋、混凝土分層澆築、入倉溫度、澆築層厚、施工間歇、混凝土彈性模量變化、水化熱發散規律、外界氣溫等因素的變化及混凝土徐變和自生體積變形等因素對面板溫度場和溫度應力的影響。 -
Creep analysis of axially compressed concrete filled steel box members
方鋼管混凝土軸心受壓構件的徐變分析 -
Research on constitutive model of elastic creep damage of heat resistant steel under the condition of high temperature and high pressure
高溫高壓用耐熱鋼彈性蠕變損傷本構模型研究 -
It dwells here upon the constitutive model of tlastic creep damage of heat resistant steel, establishing a corresponding variation principle and finite element discretization form, thus introducing complete numerical variational methods
主要提出耐熱鋼的彈性蠕變損傷本構模型，建立起相應的數值變分原理以及有限元離散化形式，從而形成完整的數值變分方法。 -
In the light of the fact that elastic creep damage happens to heat resistant steel used as pressure elements like steam pipeline and steam pockets in heat - engine plants at high temperature and under high pressure, this article gives a complete constitutive description of the damage, building up the theory of phenomenology about creep damage
摘要針對火電廠中蒸汽管道與汽包類承壓部件用的耐熱鋼，在承受高溫高壓時發生彈性蠕變損傷問題，給出完整的損傷本構描述，建立起唯象學蠕變損傷理論。 -
The high strength concrete filled steel tubular member ( hcfst ) are increasingly applied to civil engineering construction in large quantity because of its super performance., however, the shortage of full knowledge of creep of this member prevents us from further using it correctly and extensively. therefore. it ' s necessary to explore the mechanisms of creep of cfst member and influence of creep on mechanical performance of hcfst member
鋼管高強混凝土組合構件因其優越的性能日益廣泛地為工程界所應用，然而對這種構件徐變性質的認識不足卻制約了它的正確使用和推廣應用，因此，深入探究鋼管高強混凝土構件徐變機理、準確計算其徐變值並充分認識徐變對構件力學性能的影響非常重要。 -
This kind of steel is a casting material of p91, with the better performances of high temperature anti - oxidation, high - temperature creep rupture strength, t hermal conductivity and the lower performances of t hermal expansion. there is no casting in chinese
該鋼種為p91對應的鑄材牌號，材料具有良好的高溫抗氧化性能，較高的高溫蠕變強度、持久強度和韌性，低的熱膨脹性，良好的導熱性、加工性等特點。 -
The main research contents are as follows : 1. this thesis observes the shrink and creep curve of plain concrete and concrete filled steel tubes
主要研究內容如下: 1 、觀測得到素混凝土及鋼管混凝土的收縮（膨脹）徐變曲線。 -
2. this thesis analyses the curve, then obtains the principles of shrink and creep of concrete filled steel tubes, estimates the creep of concrete filled steel tubes by the test data of plain concrete creep
2 、對測試曲線進行分析，得出鋼管混凝土收縮、徐變規律及特點，用素混凝土徐變試驗資料估算鋼管混凝土徐變。 -
It ' s the first time clearly and systematically to present the concepts of restraint influence coefficient of steel to strain increment, to curvature increment and to deflection increment due to creep which are different each other. theoretical formulae are established, and approximate formulae are also obtained while considering the characteristics of common - used concrete and ambient condition of real bridges in china. so, an approximate restraint influence coefficient method to analyze the effect due to creep and shrinkage in pc bridges is put forward, and the equations to estimate second - force due to creep considering influence of steel in system - transferred continuous pc bridges is also established
本文首次清晰而系統地提出了鋼筋對徐變的不同效應（徐變應變、徐變曲率、徐變上拱）約束影響系數的概念，建立了相應的計算式；結合我國普遍採用的混凝土的徐變特性和橋梁的構造特點及工作中南大學博士學位論文摘要環境特徵，給出了具有較高計算精度的實用計算式;在此基礎上，建立了橋梁徐變效應近似分析的鋼筋約束影響系數法，並推導出了考慮鋼筋影響的超靜定梁徐變次內力的近似計算式，可方便地應用於橋梁研究和設計中。 -
On the basis of relative researches in the world, according to the study status of steel - concrete composite slab, which would be widely used in modern bridge, modified equivalent inflexibility of steel - concrete composite slab was deduced by use of conversion section principle in this paper ; based in this, this paper put forwards the theory of ultimate flexural capacity of steel - concrete composite slab in consideration of slip effect, and introduces the practical simplified method for calculating flexural deformation of steel - concrete composite slab in consideration of the effect of steel studs and welded wire, and conclude that the methods in this paper is veracious and reliable, comparing with the traditional calculating mode ; morever, this paper put forwards the calculating theory and program of the effect analysis of creep and shrinkage to steel - concrete composite slab, using conversion elastic modulus principle, and testifies that the theory is right and the program is reliable and practical
本文在國內外研究成果的基礎上，針對壓型鋼板與混凝土組合板結構在現代橋梁建設中廣泛應用前景和研究現狀，利用換算截面法導出了壓型鋼板與混凝土組合板結構的修正等效慣性矩；在此基礎上，又推出了考慮壓型鋼板與混凝土之間的相對粘結滑移影響的壓型鋼板與混凝土組合板結構極限抗彎承載能力計算理論，並介紹了考慮栓釘、聯結件影響的壓型鋼板與混凝土組合板結構簡化實用撓曲變形計算公式，而且通過與傳統計算理論的分析比較，表明本文提出的計算理論公式的準確可靠性；此外，採用換算彈性模量比法著重提出了壓型鋼板與混凝土組合板結構的徐變、收縮效應分析的計算理論和程序，並通過實例分析計算證明了理論的正確性、程序的可靠性和實用性。 -
Considering the characteristics of internal force and structures of simply supported pc bridges, a novel automatically step - up method ( asum ), taking into account the influence of steel arrangement, steel ratio, stress losses of tendons and time - dependent concrete modulus, to analyze creep and shrinkage effects is presented. this method accepts all kinds of expressions of creep and shrinkage, and it is easy to calculate total stress, strain of concrete and steel and deflection of bridge at any time, the expected prediction accuracy will be obtained by further dividing the time - step within duration
首先，針對預應力混凝土簡支梁橋的受力特徵和構造特點，提出了徐變效應分析的全量形式自動遞進法，可考慮截面上鋼筋位置、配筋率、預應力鋼筋鬆弛、混凝土彈性模量隨時間變化等影響，且計算式可適用於任何形式的收縮、徐變特性表達式；建立的公式可方便地求解任意時刻混凝土、鋼筋的應力與應變和跨中梁體的豎向變形，計算精度可方便地通過計算時段的細分來控制，直至給出滿意的結果。 -
This thesis has made the contrast test of shrink and creep for plain concrete and concrete filled steel tubes on the basis of long term in - door test, obtains the principles of shrink - creep of concrete filled steel tube, simulates the test data, analyses and contrasts the coefficient of shrink and creep, thus offers reference for the calculation mode of creep, furthermore by introducing reasonable assuming at the same time, develops the calculation formula of equivalent elastic modulus at the same time, develops the calculation formula of equivalent elastic modulus, adopts common structure analyses procedure ansys to calculate the redistribution of section stress in the steel tube and concrete during operation
本文在長期的室內試驗的基礎上對素混凝土和鋼管混凝土做了收縮和徐變的對比試驗，得出鋼管混凝土的收縮徐變規律，對試驗數據進行了擬合，對鋼管混凝土的收縮和徐變系數進行了分析和比較，從而為鋼管混凝土的徐變計算模式提供參考，同時通過引入合理的假定，並結合由「齡期調整有效模量法」導出的混凝土徐變本構關系，推導出了鋼管核心混凝土考慮徐變影響后的等效彈性模量計算公式，並以此為基礎採用通用結構分析程序ansys對成橋后鋼管和混凝土應力重分佈進行了計算。 -
3. this thesis analyses and contrasts the coefficient of creep of concrete filled steel tubes, develops the calculation formulas of equivalent elastic modulus, adopts common structure analyses procedure ansys to calculate the redistribution of section stress in the concrete filled steel tubes arch bridge
同時根據鋼管混凝土組合結構的受力特點，應用「齡期調整的有效彈性摸量法」推導出核心混凝土考慮徐變影響后的徐變等效彈性模量計算公式，從而利用通用有限元ansys進行鋼管混凝土拱橋的應力重分佈計算。 -
The analyses of shrink and creep of concrete filled steel tubes arch bridge mainly involve two questions : one is the calculation mode of shrink and creep, the other is the analysis method
鋼管混凝土拱橋的收縮徐變分析主要涉及兩方面的問題:一是收縮、徐變計算模式，二是計算分析方法。 -
Effects on the creep and shinkage of loading - age, loading - rate, member thickness, surroundings relative humidity, and ratio of steel area to concrete area are taken into account
該法可以考慮加載齡期、加載速度、構件厚度、環境相對濕度以及截面配筋率對收縮徐變的影響。 -
Many factors are considered in the study of the nonlinear buckling bearing capacities of the representative concrete filled circular and square steel tube columns, these factors include the sectional form, the slenderness ratio, the steel ratio, and the eccentricity ratio. the comparison between the test and calculating results shows that they have a good agreement. in theoretical investigation of the time - dependent behaviour of cft specimens, based on the three - dimensional viscoelastic theory, this paper proposed the three - dimensional finite element model of creep of core concrete, in which a linear three parameters visoelastic model was adopted
在對鋼管混凝土構件極限承載力的分析計算中，本文提出了核心混凝土的三維非線性應力?應變全量和增量本構關系模型，採用完全的拉格朗日表述來考慮與變形歷史有關的大變形問題，並對長細比、含鋼率和偏心率在較大范圍內變化的方、圓鋼管混凝土構件的非線性屈曲承載力分別進行了試驗和理論對比分析研究，結果表明二者符合較好。 -
Taking nanpu bridge ( fst bridge ) in chun - an county as an instance, many problems on construction control technique for cfst bridge are discussed in this paper, including : the analysis method of simulating construction phase, construction monitoring technology, calculation of stayed - buckle - cable forces, allotting deadweight of pumping liquid concrete, analysis on the inflection of shrinkage and creep of core concrete in steel tube, analysis on the error in construction control, sensitivity analysis of parameters and parameter identification
本文以淳安縣南浦大橋為背景，對鋼管混凝土拱橋施工控制中的結構分析方法、施工監測技術、斜拉扣索索力計算、泵注混凝土自重荷載的分配、鋼管核心混凝土收縮徐變分析、施工控制誤差分析、參數敏感性分析及參數估計等問題展開研究。 -
This speciality has great effect on the amount of creep, unloading proportion of core concrete and stress path of steel tube, and so on
這一特性對鋼管高強混凝土軸壓構件的徐變值大小以及徐變過程中核心混凝土的卸載比例、鋼管最終的應力路徑等有重大的影響。
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