極限剛度值 的英文怎麼說
中文拼音 [jíxiàngāngdùzhí]
極限剛度值
英文
limiting rigidity number-
The transverse stiffness limitation index ? the permissible ultimate width / span ratio b / l of the continuous steel truss girder of railway bridge is analyzed in accordance with the analytic theories of random vibration of train ? bridge time - variation system and the required derailment coefficients and comfort of drivers and passengers in train running through the bridge. the limitation index in question may be referred to in the design of the continuous steel truss girders of railway bridges
基於列車-橋梁時變系統隨機振動分析理論，按照橋上列車脫軌安全系數和司機、旅客舒適度的要求，對鐵路連續鋼桁梁橋橫向剛度限值-橋梁容許極限寬跨比b / l進行了分析，對鐵路連續鋼桁梁橋的設計具有一定的參考作用。In order to assure the bonded - strengthened beams to have ductility and fully exert the compressive capability of concrete, the paper deduces the lower limit compressive height used in design from the plane section assumption and theory of limit destruction. the lower limit compressive height is when the strain of compressive edge fiber reaches its peak value ( 0. 002 ) and the externally bonded material reaches its limited strain ( 0. 01 )
由平截面假定和界限破壞理論，並保證粘貼加固梁具有一定的變形能力和較為充分地發揮混凝土的抗壓性能，本文以受壓區混凝土邊緣應變達到峰值應變（ 0 . 002 ） ，而加固材料應變剛好達到極限值（ 0 . 01 ）的界限破壞時混凝土受壓區高度做為粘貼加固梁設計高度的下限值_ （ c0b ） h 。Through comparing and analyzing of bearing capacity, development of crack and strain of reinforced, the results show that the load - deflection plots f or specimens from the finite element analysis agree well with the experimental data, and choosing the rightful stress - strain relationship, utilizing ansys program, the test process can be well simulated. at the same time, making used of the program, the traditional shear wall is analyzed. it shows that comparing with the traditional shear wall, the hollow shear wall ' s cracking load drop 16 %, yield load and failure load drop 13 %, stiffness drop 13 % ~ 22 %
其次在試驗的基礎上，將試驗手段、有限元數值模擬方法和理論分析結合起來，利用有限元程序ansys對其中的兩片墻板進行非線性有限元分析，並對前後的承載性能，裂縫發展、鋼筋應變進行了比較和分析，結果表明有限元節點模型分析的荷載-位移曲線和試驗測得數據符合良好，選用合理的材料本構模型，利用ansys可以較好的模擬試驗過程；同時利用有限元模型對比分析了普通剪力墻和空心剪力墻，空心剪力墻與普通剪力墻對比，其開裂荷載下降16 ，屈服荷載、極限荷載下降13 ，剛度下降13 22 ，開裂至屈服、屈服至極限荷載階段的剛度衰減規律與普通剪力墻基本一致，空心剪力墻的後期剛度比較穩定。( 2 ) 3d - fem analysis for the load - bearing capacity of the stud connector as the prevailing method to determine the shear rigidity and the limit load - bearing capacity of the shear connector is the push test, which is time consuming and laborious, in this thesis the push tesi specimen of the stud connector is simulated through the non - linear analysis module of the msc / nastran and the numerical analysis results are in good coherence with that of the practicality lev ; as a result, the shear rigidity and the limit load - bearing capacity of the stud connector can be determined by the finite element method and only a few practicality verification tests
（ 2 ）栓釘型剪力鍵承載力的3d - fem分析針對當前剪力鍵一般通過費時費力的推頂試驗來確定抗剪剛度和極限承載力的狀況，本文利用msc nastran非線性模塊實現了對栓釘剪力鍵推頂試樣的數值模擬分析，數值計算結果與試驗結果能夠很好吻合。這使得通過有限元方法的模擬和少量實物試驗的驗證，就能確定栓釘剪力鍵的剪切剛度和極限承載力，可以大大節省時間和經費。Five factors of effecting specify the bearing capacity of drilled grouting pile ( engineering properties of soil, structural dimension of pile, stiffness of pile, time ) have been concluded through introducing the transmission of load mechanism of drilled grouting pile. at the same time, the effecting parameter has been collected. the paper build the ann model in predicting ultimate bearing capacity of drilled grouting pile and discuss in detail the extraction of inputting nodes information when quoting the fundamental principle of ann model and introducing research process of the improved bnn
本文簡要介紹了樁基承載力的研究現狀並指出將神經網路引入樁基工程的意義，從介紹單樁荷載傳遞機理出發總結了影響單樁極限承載力的五種因素（樁周土的工程性質、樁身結構尺寸、樁的剛度、時間以及施工工藝）並提取了相應的參數；引用神經網路基本原理，詳細介紹了改進bp神經網路的研究過程，從而建立了預測鉆孔灌注樁極限承載力的神經網路模型；並詳細討論了本模型的神經網路輸入結點信息的提取，在工程實例的基礎上進行了數值計算。Pre - stressed steel structure, a new kind of structure in which combined pre - stress with steel structure, can take full advantage of the elastic strength of steel, and multiple pre - stressed steel structure can repetitively make full use of the elastic strength of steel, thus it can enhance the structural capacity and further improve the rigidity of structure, proving that it is more economic than single pre - stress. therefore, it is both theoretically and practically important to conduct in - depth research on multiple pre - stressed steel structure
預應力鋼結構是一種將預應力與鋼結構相結合的新型結構，預應力鋼結構通過施加預應力以充分利用鋼材彈性范圍內強度，而多次預應力鋼結構可以反復利用鋼材彈性范圍內極限強度，提高結構承載能力並進一步提高結構剛度，比單次預應力具有更好的經濟效益，因此，對預應力鋼結構進行深入研究具有重要的理論意義和工程應用價值。Initial rotational stiffness ri and ultimate moment capacity mu of top - and seat - angle steel connections is given in this text. initial rotational stiffness rt and ultimate moment capacity mu of top - and seat - angle with double web - angle steel connections is given in this text. it is right by comparison with experiment
推導了頂底角鋼、腹板雙角鋼連接的初始連接剛度r _ i ，頂底角鋼、腹板雙角鋼連接的極限彎矩承載力並經和試驗比較得出兩種連接型式的初始連接剛度、極限彎距承載力其理論值和試驗值的相對誤差在工程允許的范圍內。Secondly, by using the great fem programme, analyzes the mechanism of bearing and deformation of rigid - soften composite piles foundation. draw a conclusion : exist a specific value, when the number of the rigid pile less than it, increase the number of the rigid pile, effect of reducing the settlement of rigid - soften composite piles foundation is distinct, on the contrary, when the number of the rigid pile more than it, increase the number of the rigid pile, effect of reducing the settlement of rigid - soften composite piles foundation is indistinct. finally, analyze and sum up some important design ' s constitutes of the rigid - soften composite piles foundation
其次，採用有限元計算程序，對剛柔復合樁基進行了三維有限元分析，考察了在不同荷載水平下，不同剛柔性樁比例的情況下，復合地基的平均沉降量、土體的沉降等值線和應力等值線以及剛性樁和柔性樁樁頂荷載比值隨不同基礎荷載水平的變化規律，得出了一些具有實際指導意義的結論：當總樁數不變，長樁比例增加到一定程度時，再增加剛性長樁的數量對地基整體沉降幾乎沒有什麼效果；剛柔樁分佈一定，柔性樁實際承載力小於其極限承載力時，外加荷載的增加，剛性單樁和柔性單樁所承當荷載的比值基本不變。分享友人