預應力的 的英文怎麼說
中文拼音 [yùyīnglìde]
預應力的
英文
prestressed-
To the particular case under the small eccentricity compression, the method that the angle irons are strengthened on two - sides, but pre - stress is only put one side, can be adopted firstly
對于較小偏心的特殊情況,宜採用雙側角鋼,單側施加預應力的方法。Finally, considering the request of the gfrp bars reinforced furan resin concrete electrobath, we designed the structure of the electrobath and use finite element method to analyse it. in the process, pre - stress also was considered. the result of use in practice indicate the properties of gfrp bars can meet the request of electrobath structure
最後結合玻璃鋼筋呋喃樹脂混凝土電解槽的設計與開發,對電解槽的配筋布置、結構尺寸進行了設計,用有限元方法對電解槽的整體結構進行了計算分析,並考慮了玻璃鋼筋預應力的影響,其設計計算結果已在玻璃鋼筋呋喃樹脂混凝土電解槽的實際生產中得到了應用,且使用情況良好。Load cells for compression and prestress force measurement
用於測量壓縮力和預應力的測力元件Abstract : the monitoring of tieback prestress and its existing problems are discussed for foundation pit protection at dongfang square, beijing, and the problems in the tensile, such as the loss of prestress, bias in loading, are explained
文摘:對北京東方廣場基坑支護中錨桿預應力的監測及其所出現的問題進行了分析,說明張拉過程中所存在的問題(預應力損失、偏心荷載等) 。The layered combined finite element model is taken in the finite analysis of concrete and bonding bar. in the nonlinear analysis ofunbonded prestressed concrete, the effect that unbonded tendons acts on concrete is replaced by equivalent force in the method of equivalent prestress
在有限元分析中,混凝土和粘結鋼筋採用分層組合式的有限元模型,在無粘結預應力混凝土的非線性分析中,將無粘結預應力筋對混凝土的作用,借鑒預應力的荷載平衡法,用其等效力來代替預應力作用。The main factors including concrete cover and prestressing levels which may have influence on the fire resistance of the simply - supported slabs are examined. the deflection and prestress are presented. from the results of tests, the fire endurance of the simply - supported slabs are given
在簡支板的火災行為試驗研究中主要考慮了普通鋼筋的保護層厚度和預應力度兩個因素,主要測試了構件的撓度變化及預應力的變化,並由此得出了其耐火極限。The prestress in the structure have two functions : on the construction process, the prestress keeps the structures to be formed ; but on the initial equilibrium state, the prestress changes the force in the members and keep cable do not out of work
提出了預應力對結構的作用有兩個:在施工成形階段,預應力的作用為保證結構能夠施工成形;而在施工成形后,預應力的作用主要是改變結構中各構件的內力分佈,同時控制索不要退出工作。Topology optimization of continuum combined structures with prestress
帶有預應力的連續體組合結構拓撲優化Initially all structures were prestressed by high-strength bars.
起初,每個橋梁都是通過高強鋼筋施加預應力的。Zhaihe bridge was taken as an engineering example, in - situ tests of deflections and stresses of the concrete slabs of 10 conditions before and after steel rods plantation and transverse pre - stresses execution, and the testing shou reveal that steel rods plantation can protect the assemble type concrete slab bridage deck, increase the bearing capacities of bridge and decrease the deflections, which provide basis for related engineering about reinforcement of bridge deck
以寨河橋為工程實例,進行了植筋和預應力張拉前後10個工況的混凝土板撓度和應力的現場測試,結果表明,植筋等增加橋面預應力的措施確實能夠預防橋面病害的發生,並能提高橋面的承載力,減小撓度,為相關工程提供了依據。The main work of this paper was as fellows : ( 1 ) generalized the development of pre - stressed steel structure in our nation and abroad, and pointed out the main problem in practice ; ( 2 ) presented the mechanism of pre - stressed steel structure and revealed its applicable range ; ( 3 ) established the optimization design model for pre - stressed steel structure, which accounts for constraints on stresses and displacements of structure ; ( 4 ) brought forward the optimization design method, which combined linear programming and the principle of full restriction, through which we can obtain the magnitude of each time pre - stress and the optimized sections of each members of structure ; ( 5 ) analyzed the best times of pre - stress and pointed out that 2 ~ 3 times is preferable ; ( 6 ) conducted optimization design on large - space steel roof, horizontal parallel steel truss with local cables, horizontal parallel steel truss with global cable, and ultra - static steel truss, the result of which indicated that the multiple pre - stress structure is very economic ; ( 7 ) compared different schemes of cable placement for horizontal parallel steel truss, and the results showed that the local cable only unloaded the second girders, but had no response on the first girders and stomach poles, while global cable could unload the second girders and the stomach poles outside of turning point of cable, thus proving that global cable is more economic than local - cable
本文的主要工作是:對國內外預應力鋼結構的發展歷史及現狀作了綜述和總結,指出當前預應力鋼結構工程實踐中存在的主要問題;闡述了預應力鋼結構的受力機理,並指出預應力鋼結構的適用范圍和特點;在考慮結構應力和變位約束的條件下,建立預應力鋼結構優化設計模型;提出多次預應力鋼結構優化設計方法和步驟,採用線性規劃和滿約束準則相結合的優化方法,可優化設計出施加的每一級預應力的大小,並得到結構各部分的優化截面;對多次預應力最佳的施加次數作了分析,並建議以2 3次為宜;為驗證文中理論和方法,分別對大跨多次預應力鋼屋架、局部布索的水平平行弦鋼桁架、整體布索的水平平行弦鋼桁架和局部布索的超靜定鋼桁架等算例進行了優化設計,經濟效益明顯;對水平平行弦鋼桁架的幾種施加預應力的方案進行比較,對于局部布索,預應力只對下弦起到卸載作用,對上弦和腹桿基本不起作用;而整體布索預應力除對下弦卸載外,對索折點以外部分腹桿也起到卸載作用,經濟效益好於局部布索。Combined with the full scale models tested in - situ of prestressed concrete penstock with double circle unbonded strands and single circle bonded strands of xiaolangdi multipurpose dam project of yellow river, the advantages and disadvantages of two different prestressed systems are analyzed, the concrete stress distributions of the prestressed concrete penstock are induced and summarized during the whole tensioning strands stage. the consistence among the test results, the theory calculating and the three dimensional finite element analysis is proved. therefore, the theoretical method of prestressed concrete penstock is feasible
結合黃河小浪底水利樞紐工程在施工現場進行的採用雙層雙圈環形無粘結預應力鋼絞線和單圈有粘結預應力鋼絞線對排沙洞襯砌混凝土施加預應力的1 : 1模型試驗,對比分析了兩種后張預應力施工體系的優劣,歸納總結了預應力筋束張拉過程中預應力混凝土壓力管道結構管壁混凝土的內力分佈規律,驗證了模型試驗實測數據、理論計算和三維有限元分析結果的一致性,確定了預應力混凝土壓力管道理論計算方法的可行性。( 1 ) based on the experiments, this thesis discusses the stress loss of vertical prestress caused by deformation of anchorage, the resilience of the tendon and the joint compression ( l2 ), the elastic compression of the concrete ( l4 ) and the relaxation of the tendon ( l5 ). it is concluded that the anchorage deformation is dominated in vertical stress loss. measures are suggested to diminish the loss of the vertical prestress during the design and construction of the bridge
( 1 )本文在試驗的基礎上,研究了豎向預應力筋的錨具變形、鋼筋回縮和接縫壓縮損失l2 、混凝土的彈性壓縮損失l4和力筋的應力鬆弛損失l5 ,其中,第一項是最主要的損失,論文據此對設計和施工中如何減小豎向預應力的損失提出了自己的看法和建議。Railway applications - track - concrete sleepers and bearers - part 2 : prestressed monoblock sleepers
鐵路設施.軌道.混凝土枕軌和支撐架.第2部分:加預應力的單塊枕木At last, some conclusion has been obtained. at present the effect of cable and its pre - stress is not very clear. based on the rule of conversation of energy, it is proved to be right in theory that the stiffness of the linear elastic structure is larger with the increase of its pre - stress
針對目前關于索在結構中的作用以及索中預應力的增加對結構剛度的影響到底如何等討論,本文從能量守恆原理出發,從理論上推導證明了在線彈性范圍內,結構的剛度隨預應力的加大而提高這一重要結論。And the procedure of solving initial prestress by equilibrium matrix theory and simplified method are elucidated. the self - stress mode of sunflower - patterned cable dome must be positive, and the mechanisms mode equals to zero. it seems like statically indeterminate structures and is geometrical stable structure
明確了葵花型索穹頂結構形態分析的具體內容;闡述了用平衡矩陣理論和簡化演算法求解索穹頂結構初始預應力的過程,指出葵花型索穹頂結構的自應力模態s 0且機構位移模態m = 0 ,相當于結構力學中的超靜定結構,同時它也是幾何穩定的結構;提出了考慮結構自重時葵花型索穹頂結構初始預應力的求解方法,這種方法求得的初始預應力更加準確。According to different transverse difference in temperature and lengthways difference in temperature, the paper gave the method of computing temperature effect including : 1 ) the stress ot1 caused by nonlinear difference in temperature. 2 ) the constrain stress o t2 in undetermined structures by equivalent difference in temperature. 3 ) the constrain stress ot3 caused in undetermined structures by even difference in temperature tm
針對具有不同性質的橫向溫差和縱向溫差,本文分別提出了預應力結構的溫度效應的計算方法,包括: 1 )非線性溫差引起的自約束應力_ ( t1 ) ; 2 )等效線性溫差引起的超靜定結構的約束太原理工大學碩士學位論文應力民3 )均勻溫差tw引起超靜定結構中的約束應力4 4 )均勻溫差tm引起梁的軸向變形受到柱的側向約束,與預應力筋的溫度變形之間的差異引起的預應力的變化。The former model of staged loading and staged optimization is improved, in which the value range of pre - stress restrict in restrict equation. it provides the theoretical base for the loading time of multi - pre - stress and the value of pre - stress. and examples analyzed with linear programming and full - constrained methods prove the convergence effect well
論文在單次預應力鋼結構的優化模型的基礎上,建立了多次預應力鋼結構的優化模型,將原有的分級加載,分級優化的模型加以改進,在優化模型中將約束方程中的預拉力約束的取值范圍擴大,使得多次預應力的施加次數、施加預拉力的數值大小的確定有了理論根據,並利用線性規劃和滿約束結合的方法進行求解,通過算例分析,收斂效果較好。The general regularity of prestress and cracks are analyzed
對裂縫的出現和預應力的變化規律作了相應的闡釋。A brief discussion on the design and construction of prestressing force of a project
淺談某工程預應力的設計與施工分享友人