無應力變形 的英文怎麼說
中文拼音 [wúyīnglìbiànxíng]
無應力變形
英文
stre le deformation-
Comparing with the same category overseas jointless bridges, the new type bridge has more reasonable structure, more simple and convenient construction, and better use effect etc. the main work in this paper is described as follows : ( 1 ) this paper introduces phylogeny and reseach survey of the joints bridge inland and abroad, and a new jointless bridge structure ? new type semi - integral abutment bridge is based on these, which characteristic of own structure and setting of primary component are expatiated. ( 2 ) this paper analyses influence of temperature effect, creep, shrinkage and circumambient soil of run - on slab on the new type structure, and analyses the forcing performance of beam, abutment and run - on slab of the new type semi - integral abutment bridge, and constrast to the same category joints bridges
本文主要做了以下工作: （ 1 ）介紹了無縫橋梁在國內外的發展歷史、研究概況，並在此基礎上提出了一種新的無縫橋梁結構形式-新型半整體式無縫橋梁，闡述了它特有的結構形式以及主要構件的設置; （ 2 ）分析了溫度效應、徐變和收縮以及搭板周圍土體對這種新型結構的影響，對新型半整體式無縫橋主梁、橋臺以及搭板進行了受力性能分析，並和同類無縫橋梁進行了對比分析。Cuttings shape and size can significantly change from clean cut to angular, splintery, chunky and usually larger than normal usually due to stress relieving
由於應力消除，鉆屑的形狀和大小都有明顯變化，有時無巖屑，有時巖屑的稜角、片形、厚度都比平時的要大。Nevertheless, in these approaches the contact intethee are charactered sboly ed stiffeess k. and k. " which is not perfect and rigorous in thc vitw of solid mechanics and rather rough for the description of the behavior of the idtfores. in collbet, taken as a contact problem, the principal chatrs of the idtcthees can be reflected : ( l ) the cbntact inifore is of shear strength which implies tha a generic pair of contact points on the inidse will displace coincidentally if the tangential fbrce at this point has not reahed the 1imit resistance, else, relative s1ide betwee the points will occur along the tangental direction. ( 2 ) no matter the relative slide occurs or not, the contact bodies cannot invade each other in any wise
本論文在對這兩種方法進行認真的分析后，說明它們對不連續面的描述並不合理，也無法反映出不連續面的主要力學特性，同時指出，將帶有不連續面的巖土工程問題作為接觸問題計算更為合理，它可將不連續面受力變形的主要特點反映出來，即： （ 1 ）接觸面具有相應的「抗剪強度」 ，即當接觸面上某一點處的切向應力小於該點處的抵抗強度時，點對共同變形；達到強度時，則沿切向發生相對滑動； （ 2 ）在整個變形過程中，發生接觸的變形體不能相互侵入。The study in the paper starts with beam distortions, and it treats the plastic deformation area as pure bending sect, rest of the beam as rigid bodies. according to different shapes of the external tendons, it divides into three structural forms familiar in projects, that is the beams with no deviator, with a deviator and with two deviators, and studies the relation between the deformation of the external prestressing tendons and that of the beams, and derives the formulas of the ultimate stress increment of external tendons. in the formulas, the ultimate angle corresponding to half of the plastic deformation area is considered as a variable parameter
本文首先從梁極限狀態下的變形入手，將塑性鉸區看作純彎段，將塑性鉸以外的區域看作剛體，按照體外預應力筋的形狀不同，分工程中最常見的三種體外結構形式，即無轉向塊的直線型體外筋混凝土梁、具有一個轉向塊的單折線型梁和具有兩個轉向塊的雙折線型梁，研究體外預應力筋變形和梁體的變形間的關系，推導出以極限狀態下塑性鉸區之半對應的轉角為參數的計算體外預應力混凝土簡支梁以及連續梁的體外筋應力增量計算公式，並進一步求得梁的極限承載力。The first stage is primary slip then followed by secondary slip ; the last stage is due to dislocation passing the slips. the cyclic stress strain ( css ) curve exhibits a stronger hardening occurred in cyclic plastic deformation than that in tensile test
建立了拉伸和應變疲勞的有限元模型，使用基於晶體滑移模型的數值方法，對晶體內部滑移系的啟動以及滑移繫上的分解切應變、切應力這些無法試驗觀測的變量進行計算，分析它們對晶體塑性變形的不同影響。Besides, the gauss interpolation function and the domain of support which includes much more nodal information than finite element method does is used to make meshless method much more earlier solve the large deformation and distortion and describe the local characteristic ( such as stress locality et al. ) more facilely
並由於在無網格法中採用了高次插值函數和包含有較多節點的支持域（在有限元法中的支持域只包含單元節點） ，從而使得無網格法能方便地處理變形畸變和應力應變局部化等問題。Based on nonlinear finite element theory, stress and deformation behaviors are analyzed after ground stabilization and foundation pit reinforcement with deep mixing method. by comparison of the conditions of treatment and non - treatment of two examples respectively, the results indicate that the match ratio scheme used for deep mixing method is more ideal when soft clay is stabilized in this area of fuzhou in the thesis. this scheme not only can fully utilize industrial waste material, but also can economize construction cost
對于加固土的工程特性，本文以非線性有限元理論為基礎，模擬分析水泥攪拌樁加固地基和基坑支護加固的應力和變形情況；通過兩個例子分別在有處理和無處理情況下的對比，利用固化劑最佳摻入比來設計地基處理方案，並運用非線性有限元方法計算出土體內大小主應力的分佈情況以及變形情況，結果表明本文所得出的配合比方案用於深層攪拌樁法來對福州地區軟粘土進行地基加固時還是比較理想的，這樣不僅充分利用工業廢料，還可節約工程造價。Integration of these two sides could let the results of layerwise summation method ( lsm ) be more accuracy, which can consider not only soil stress history but also soil lateral deformation and soil nonlinear properties even. ( 5 ) research on the application of meshless method for embankment settlement calculation
綜合這兩個方面，單向分層綜合法的計算結果趨于更準確，其不但能考慮應力歷史外，而且能計入土體側向變形甚至土體非線性特性； （ 5 ）路堤沉降計算無單元法應用研究。In this paper, the high - temperature low - cycle fatigue life and fatigue crack propagation life tests are carried on the cylindrical axial symmetry specimens having precrack or non - precrack with different types of notches of 16mnr steel in common use in the petrochemical industry contacting coke drum equipment, the stress / strain and the range of stress / strain of dangerous points are received through stress analysis of the specimens using finite element program under multi - axial stress state. at last, the equations of evaluating the high - temperature low - cycle fatigue life and the fatigue crack propagation life are found through using the least - square regression method
本文採用無預裂紋和帶預裂紋環狀缺口圓柱形試樣，進行了石化焦炭塔設備常用材料16mnr多維應力狀態下不同缺口形式的高溫低周疲勞總壽命試驗及裂紋擴展壽命試驗，並利用有限元程序對試樣缺口周圍及裂紋尖端附近進行了軸對稱多維應力狀態下的應力、應變場分析，來評價材料不同條件下的高溫低周疲勞總壽命和裂紋擴展壽命，最後利用最小二乘回歸方法，得到了該材料高溫低周疲勞總壽命和裂紋擴展壽命評價方程。The prime works are as follows : strain and stress distribution of section was analyzed. the effect of prestress degree. on cracking moment was explored. the relation of the unbonded prestress increment to effective reinforcement index and corresponding bonded prestress increment were studied. the formulae had been established
其次，設計了三根活性粉末混凝土無粘結預應力疊合梁，兩點對稱集中加載、一次受力，得到了它們的截面應變分佈、撓度與變形、無粘結預應力鋼絞線的預應力增量、裂縫的發展與分佈以及極限荷載。Recently, train is running faster and faster, and considering the stability and security, seamless welded rails ( swr ) are used as the train orbits gradually. the temperature of the rails will vary with weather. so that the rails may release the energy due to the metal characteristic of expanding or contracting with temperature, there is some badly distortion in the swr, worsly occurring accidents on expanding orbits. the portrait thermal stress ( pts ) of the swr should be monitored in some parts regularly, as to avoid such accident
近年來，隨著火車的提速造成的穩定和安全問題，軌道逐步轉為採用無縫焊接鋼軌，隨著鋼軌溫度的變化，無縫鋼軌可能會因為熱脹或冷縮的金屬特性並且在扣件阻力小而且路基較差的路段釋放能量，可能會發生鋼軌嚴重變形，更甚者會發生脹軌跑道等嚴重鐵道事故，為了避免發生如此事故，有必要定期對鋼軌的溫度應力進行檢測。Secondly, calculation theory of construction for suspension bridge is presented under the ideal condition of dead load design. linetype change stiffness of cable and slip stiffness of supporting points are deduced based on segmental catenary theory. then numerical analysis method through sgkz2000 software are introduced in detail about calculating design linetype for suspension bridge, unstressed length of cable, erection linetype of cable and pre - displacement of saddle without loads, erection linetype of wire strands, the fixed position for erecting cable band and linetype of lifting stiffening girders
其次，根據懸索橋恆載設計理想狀態建立了懸索橋施工計算原理；以分段懸鏈線索理論為基礎，推導了懸索的線形變化剛度和懸索支點的滑移剛度；介紹了懸索橋成橋設計線形計算、吊索無應力長度計算、空纜線形與預偏量計算、絲股架設線形計算、索夾安裝位置計算和加勁梁吊裝線形計算的具體方法、數值演算法及軟體sgkz2000的計算模塊的實現。This paper also presents the methods of controlling unstressed length of cable, pre - displacement of saddle, anchor span tension, erection of wire strands, the fixed position for erecting cable band and cable length. determination and control approach of displacement of saddles during cable erection are also introduced. at the same time, the change course of linetype during construction period for suspension bridge is analyzed
再次，介紹了懸索橋的施工控制內容與方法，利用軟體sgkz2000對多座懸索橋進行了施工計算，提出本文關于懸索橋的主纜無應力長度控制、索鞍預偏量控制、錨跨張力控制、絲股架設控制、索夾安裝位置與吊索長度控制的方法；介紹了吊梁階段鞍座頂推量的確定與控制方法，分析了施工階段懸索橋的線形變化過程。In the simulation and analysis on culvert construction, the method of foundation - pit excavation layer by layer and step by step was used, i. e. the method that makes the surface of excavation have no stress, when the elements were excavated gradually in period of construction. at this process, the state of soil is unloading, the laws of stress field and displacement field with the depth of excavation were studied. based on the obtained stress field and displacement field after the excavation was completed, by using of the newly increased filling - elements " gravity and the grinding force, the simulation of the construction of body of the culvert and foundation - pit ' s filling layer by layer had also been done in this dissertation
用有限元法模擬分析涵洞基坑開挖時，採用分層、分步模擬開挖過程的方法，即將計算域內單元分層「挖去」 ，使開挖表面成為無應力表面的方法，分析土體在卸載狀態時的應力場和位移場隨開挖深度的變化規律；在洞體施工后，回填土體時，據開挖完成時的應力場、位移場，通過逐級增加計算域內的單元數目，施加每級新增加單元的自重荷載，利用有限元法模擬基坑及上覆土體分層填築的施工過程，這不僅反映土體處于再加載應力狀態時，填土受力及變形的一般規律，而且這種將地基? ?涵洞? ?土體作為一個統一整體進行模擬的方法，量化了三者之間的相互作用關系。( 1 ) the statistical damage constitutive model for rock is improved basing on the hypothesis that the strain in the rock without damage is ideal to that in the damage rock. the hypothesis that all of the stresses in damage evolution equation are effective stresses is realized, and the proplem how to couple plastic strain to damage is solved
主要工作內容如下： （ 1 ）在假設無損巖石的應變和巖石總應變相等的基礎上完善了巖石的統計損傷本構模型推導，實現了損傷演化方程中全部採用有效應力假設和探討了損傷和塑性變形耦合問題。So, when we get the dates of stress and distortion of wing ' s model structure, which have been calculated by computer, we can simulate the dates of the real wing ' s structure, which we will get through stress sensors and distortion sensors. when we transmit those dates to the center computer through remote wireless transmission devices, the computer will analyze those dates according as scientific fault criterion. so we can carry out the remote real - time health monitoring for wing ' s structure
這樣，我們讀取計算出的機翼結構模型在受力時的應力、變形值就可以模擬出在採用實體機翼作為研究對象時應力、變形傳感器傳回的數據，把這些數據通過遠程無線數據傳輸設備傳到數據處理計算機上採用科學的故障判據對這些數據進行處理就可以實現對機翼結構的實時遠程健康監控。One of distinct characters of geotechnical problems is that there exist various interfaces such as interface between the structure and geotechncal medi8, the joints in rock mass, sliding face in soi1 and so on, which will effect the mecbocal behaviors of the geotecndcal media and the structures significanly so far though the finite element method has been wildly used in geotecbocal field, it still remains an inthectable problem to simulate these inteffoces idealiy in the numerical analysis
計算對象的不連續性是巖土工程問題的一個重要特點，這些不連續面主要是存在於基礎?土體、擋土結構?土體、地下結構?圍巖等結構與周圍巖土介質問的界面，或是巖體中的節理或軟弱夾層、土（巖）滑坡的滑動面等。不連續面的存在顯然對結構及巖土體的受力變形有著不可忽略的影響，因此在計算中不應無視它的存在。It points out that the principal strain rate is coaxial with the principal stress at critical state and is independent of the critical stress surface
指出散粒體臨界狀態下的主應變率與主應力共軸，而與臨界應力面形狀無關。A new method, which is based on the force equilibrium condition and the geometrical compatibility condition of cable, according to the constant unstressed length of cable, is presented in this paper to determinate the geometric of suspension bridge free cable. numerical examples with humen suspension bridge are given to demonstrate the effectiveness and the validity of the proposed method
根據索的力的平衡條件及變形相容條件，由纜索無應力長度不變的原則來建立纜索狀態方程，提出了懸索橋主纜空纜狀態線形分析的一種新方法.以虎門懸索橋為例對該方法的正確性和適用性進行驗證，可供橋梁工程技術人員設計參考Abstract : a new method, which is based on the force equilibrium condition and the geometrical compatibility condition of cable, according to the constant unstressed length of cable, is presented in this paper to determinate the geometric of suspension bridge free cable. numerical examples with humen suspension bridge are given to demonstrate the effectiveness and the validity of the proposed method
文摘:根據索的力的平衡條件及變形相容條件，由纜索無應力長度不變的原則來建立纜索狀態方程，提出了懸索橋主纜空纜狀態線形分析的一種新方法.以虎門懸索橋為例對該方法的正確性和適用性進行驗證，可供橋梁工程技術人員設計參考分享友人