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dead load 1.靜荷重,自重;底載。2.【電學】固定負載。

dead loan

Based on survey data from some researches , dead load model and vehicle load model are presented in this paper . it is quite evidence that dead load model is gaussian distribution , and vehicle load is non - gaussian distribution , which operates general traffic and rush hour traffic states 本文在國內外各種調查資料的基礎上,分別引入恒荷載模型及車輛荷載模型,其中恒荷載呈正態分布:車輛荷載則為非正態分布,并將其分為一般運行狀態及密集運行狀態兩種情況,分別建立服役期最大值分布函數。

This deflection can not be neglect in bridge design . this paper adopts the steel box girder design of main span of anqing changjiang highway bridge as the study backgrouds , the thesis uses structrial analysis module of ansys software , ansys5 . 7 , to calculate and analysis the transverse deflection of steel box girder under selfgravity and secondary dead load 本文以安慶長江公路主橋鋼箱梁設計實踐為研究背景,應用有限單元法通用程序軟件系統ansys5 . 7中結構分析模塊,計算了鋼箱梁橋面板在恒載作用下的橫向撓度值。并就影響橋面板橫向撓度的多種變量進行較為深入的計算和分析。

Secondly author calculates and analyses normal stress and shear stress of the girder for a assembling post - tensioned concrete skew girder bridge with a span of 40 m due to the actions of the dead load , temperature changes , shrinkage and creep of concrete and live loads , and calculates and analyses normal stress and shear stress of diaphragms due to the actions of the subordinate phase dead load , temperature changes , shrinkage and creep of concrete and live loads 其次重點對跨徑為40m標準設計的裝配式后張預應力混凝土斜梁橋在恒載、溫度變化、混凝土收縮和徐變、活載作用下主梁的正應力、豎向變形和恒載、活載作用下主梁的剪應力進行計算分析。計算分析橫隔板在二期恒載、溫度變化、混凝土收縮、活載作用下的正應力、剪應力。

Modeling the general solid web continuous box girder and opening - in - web ( open web ) continuous box girder by ansys finite element modeling tool , node stress of governing section and corresponding shear lag values are analyzed . the solution is validated by comparing with variational results and modeling test values . based on the model , the section shear lag induced by dead load , prestress tendons and car loads under the most unfavorable condition and lateral symmetry are also approached . the influence of shear lag effect in double - level continuous box girder is considered with opening - in - web and the web location . the analysis indicates that double - level - load arouses less shear lag effect than one - level - load . when self - weight and prestressed tendons act on together , the shear lag effect on box girder take on a evidently change 基于所建立的有限元模型,本文分別對實腹和腹板開孔兩種箱梁在恒載、車載、預應力荷載作用時,各主要截面的剪力滯效應進行分析,通過施加縱向最不利的和橫向對稱的車輛荷載,研究實腹連續箱梁和空腹連續箱梁在承受雙層荷載和單層荷載時引起的剪力滯效應,并考慮腹板開孔及開孔位置對于連續箱梁剪力滯效應的影響。分析表明,雙層車載對于箱梁引起的剪力滯系數比單層車載的影響要小,對于箱梁中存在引起的剪力滯后現象有一定的改善作用。

Some key issues in the modeling of a long span composite cable - stayed bridge are discussed such as cable tension , dead load , large deflection , concrete deck stiffness , concrete deck - steel girder connection , and boundary condition . some conclusion can drawn from the thesis : 1 . the initial equilibrium configuration of the bridge is clarified in the thesis 本文深入討論大跨度結合梁斜拉橋“基準“有限元模型建立過程中的幾個關鍵問題并得到一些有意義的結論: 1 .明確斜拉橋在索初應力和恒載作用下的初始平衡構型? ?處于初始平衡狀態時的幾何位置,給出了其計算方法。

In the end , the steel - reinforced concrete arched bridge ( chun ' an weiping bridge ) , which span is 198m , is analyzed by the proposed three - dimensional nonlinear finite element method and also those gained conclusions are directly adopted in the computation . the universal stability coefficient and nonlinear buckling stability coefficient of the bridge are respectively computed , in which the dead load and the live load are assembled according to the criterion . on the other side , the regularities of creep deformation and subsidiary stress of the investigated bridge under the first - stage dead load are carefully researched 最后,將本文所提出的三維非線性分析方法及其主要研究成果直接應用于198m跨勁型骨架式鋼管混凝土拱橋“淳安威坪大橋”的分析計算中,對該橋在最不利恒載和活載組合下的一般特征值失穩系數和非線性屈曲系數進行了對比研究,并對一期恒載長期作用下該橋的徐變變形、附加應力以及截面應力、應變重分布規律分別進行了深入研究。

Reactive powder concrete ( rpc ) is a new kind of compound concrete that has ultra - high strength , high ductility . besides having characteristic of concrete filled steel tubular , rpc filled steel tubular structure can decrease cross section owing to the ultra - high strength of rpc , and economize on concrete and small dead load . the structures have broad prospects in high commercial and civil building , many - storied factories , high - span bridges and urban traffic 活性粉末混凝土( rpc )是一種新的超高性能、高韌性的水泥基復合材料,將其灌入鋼管形成鋼管活性粉末混凝土,這種結構除了具備鋼管混凝土的一般特性外,因其超高強度使構件截面尺寸大大減小,還可進一步節約混凝土并減輕結構自重,必將在高層建筑、公共建筑、多層廠房、橋梁、交通等領域有著廣泛的應用前景。

Based on the geometrical non - linear finite element theory , a fine iterative method of simulating all construction stages of self - anchored suspension bridge is proposed and used to pingsheng bridge . the construction plans of suspension rod and second dead load are discussed in details . the model test of pingsheng bridge is completed 此外,對平勝大橋的整體穩定性及極限承載力進行了分析,并在全橋模型上進行了超載試驗研究,結果表明,平勝大橋的總體穩定是有保障的。

A space geometric non - linear static finite element analysis program about the long span plate - truss composite cable - stayed bridges is presented . not only it can be used to solve the space static analysis about the state of the dead load configuration ( geometry and internal forces ) , but also it can be used to analyze the internal forces and deformations of the whole construction course 基于以上理論,并結合斜拉橋的施工過程,編制了大跨徑斜拉橋的空間幾何非線性靜力分析程序,既可用于斜拉橋成橋狀態的空間靜力分析,也可結合斜拉橋的具體施工過程,進行施工過程中的內力與變形狀態的跟蹤分析。

Dynamic performance of pingsheng bridge and the ground - anchored suspension bridge model , which has the same structural parameters as pingsheng bridge , is calculated . furthermore , the influence on dynamic performance for pingsheng bridge of structural parameters , such as rise - span ratio of main cable , dead load 6 .針對大跨度自錨式懸索橋可能存在的風致振動,對平勝大橋進行了節段模型和全橋模型風洞試驗研究,研究表明:平勝大橋具有足夠的抗風穩定性。

Finally an engineering example is analyzed . reliability index is determined considering two types of corrosion models and two types of vehicle models . the influences of some parameters , such as dead load live load , corrosion speed , diameter of steel bar , are analyzed 通過一個具體工程實例,分別計算其在一般運行狀態及密集運行狀態時考慮全面銹蝕及局部銹蝕情況下的可靠度指標,并且討論了恒載、車輛荷載、鋼筋銹蝕速度、鋼筋直徑等參數對橋梁可靠度的影響。

Author also stressly calculates plane deformations of skew girder bridge due to the actions of the subordinate phase dead load , temperature changes , shrinkage and creep of concrete and vehicle loads in different places , and thereby analyses the characteristics of plane movement for the skew girder bridge 作者還著重對斜梁橋的二期恒載、混凝土收縮、徐變、溫度變化和不同位置汽車荷載作用下的平面變形進行計算分析,由此分析斜梁橋的爬移特點。

After fatigue tests were carried out for 44 stand beams , the following consequences were achieved . 1 , contrasted with lsfrc , the strength of standing dead load of lhfrc are improved above 10 . 62 % . contrasted with plain concrete , the amount is 22 在對44根標準試驗梁進行抗折疲勞試驗的基礎上,本文主要取得以下成果或結論: 1 、層布式混雜纖維混凝土的靜荷載抗折強度比層布式鋼纖維混凝土提高約10 . 62 ,比素混凝土抗折強度提高了22 . 6 。

In single pylon cable stayed bridges , and cable stayed bridges without backstays , when the bottom of the tower bears the moment from the dead load , it is concluded that non - symmetric configuration of pile cluster corresponding to the upper structure is more practical than symmetric configuration of pile cluster 當獨塔斜拉橋、無背索斜拉橋等橋梁塔底永久作用有彎矩時,與完全對稱的基礎形式相比較,和上部結構相協調的不對稱基礎形式更加適用。

Cold - formed steel deck has several advantages , including small dead load , better ductility , large overall horizontal rigidity , better anti - seismic , fast construction speed , less consumption of wood , less cost and so on . it has shown a great future for its wide application 壓型鋼板-砼組合樓板具有自重輕、延性好、整體水平剛度大、抗震性能好、立體交叉施工速度快、少用木材、降低工程造價等優點,也已展現出廣闊的應用前景。

As an example , the space analysis model about the wuhu changjiang river bridge is done and the internal forces about the wuhu changjiang river bridge due to dead load and lived load are analyzed . 2 . the vibration analysis of the long span plate - truss composite cable - stayed bridges 文中以蕪湖長江大橋為例,建立了該橋的空間有限元分析模型,并重點分析了該橋在自重恒載作用下的結構內力及車輛荷載對橋梁結構內力的影響。

Based on a practical engineering , the basic fem model of a five - span continuous rigid frame bridge is built , and with which the static behavior of the basic bridge under dead load and annual temperature change and sunshine temperature differential is analyzed 本文以某一實際工程為背景,建立了五跨連續剛構橋的基準有限元模型,分析了基準橋在自重荷載、年溫度變化、日照溫差三種荷載工況下的受力情況。

The damage capacity is estimated by test data . the randomness of materials and earthquake are considered during process of analysis . influences of dead load on the structural reliability were considered too 采用montecarlo隨機模擬法,分別分析了只考慮地震作用隨機性以及同時考慮材料強度和地震作用的隨機性時對結構的失效概率的影響,表明了材料強度的隨機性對結構總體失效概率有一定的影響。

In use of the comprehensive method , least squares method is used to adjust cable force by limiting moment of girder of cable stayed bridges . this article proposes a conception of reasonable moment under dead load and gives a method to solve this reasonable moment 針對最小二乘法調束要求的主梁彎矩控制條件,提出主梁合理恒載彎矩這個概念,并推導主梁合理恒載彎矩的求解方法。