桁弦 的英文怎麼說

Bow and string girder

弓弦式桁梁

The possible shear of the upper chord will change beam from flexural member to member under flexure and compression force. this is emphasised through design example. as a result ， we find that composite floor system is good for reducing the height of floor system

在組合樓蓋體系設計中，筆者指出，可能的桁架弦桿剪力會使作為桁架弦桿側向支承的梁由彎曲構件變為壓彎構件，這是在與桁架體系相適應的樓蓋體系設計中應該注意的一個環節。

4 ) the different between global ductility gained using fully restrained model for truss connections and partial restrained model for truss connections indicate the fully restrained is better for the global ductility of the staggered truss steel framing

5 ）通過桁架採用不同連接計算模型的比較，指出在鋼結構交錯桁架的製作中，無論是混合桁架體系還是空腹桁架體系，都希望能夠保證桁架腹桿與弦桿的可靠連接。

Broken chord truss

曲弦桁架

Among the design of the truss system, it is deeply analyzed that the thought of choosing truss system type, the difficulties in designing truss system and their solutions, the constrain of column to truss chord deformation and the chord modified coefficients used in this case

在桁架體系設計中，筆者主要分析了桁架體系的選型思路；提出了桁架體系的設計難點，並給出了解決方案；分析了柱子約束對桁架弦桿受力的影響，並給出了在手算桁架體系桿件受力時所需要的弦桿內力修正系數。

Construction of ultra - large span prestressed string truss structure

超大跨度預應力張弦桁架結構施工

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。

A new type bss - - spatial truss string is analyzed in this paper

本文分析了張弦梁結構的?種新型體系? ?張弦空間桁架。

The paper presented a large annular cantilever beam string stadium roof structure using the theory of beam string structure. the stadium roof structure is a novel structure that is reasonable in bearing force by using the character of the tendon and beam fully. the struts in the structure avoided enduring big moment, moreover the pre - stress upper chord tendon and the annular beam work together to resist upward and downward load, as embody the structure ' s artifice and wonderful space mechanical property

本文利用張弦梁原理，給出了一種大型環狀懸臂型張弦梁挑蓬結構，該種體育場挑蓬結構新穎，充分利用了拉索和立體桁架受力的特點，使得結構受力更加合理，避免了柱子承受較大的彎矩，上弦索的預張力和圈樑使結構共同作用抵抗上下荷載，更體現了結構的巧妙和良好的空間受力性能。

For construction control, its characteristics in initial state and load state are compared in this paper

通過比較在初始態和荷載態下張弦空間桁架的受力性能，為進一步的施工控製做準備。

The pre - stressed arch truss string structure is one of the new pre - stress steel structure styles, because it possessed of rational mechanical feature, it has been used in many national and foreign engineering practices

預應力張弦拱桁架結構是一種新型的預應力鋼結構形式，由於其受力合理的特點在國內外工程實踐中得到了較多應用。

Curved top chord

曲線形上弦桿桁架

The optimized section area considering reliability is in some degree different from that without it, which can be applied in practice. the examples of three bar truss and parallel chord truss with biggish span are analyzed on the conditions of reliability or not, the results of which prove the model and method proposed in this paper are feasible

本文分別從考慮可靠度約束和不考慮可靠度約束的情況下對三桿桁架，和跨度較大的平行弦桁架進行算例分析；並將兩種演算法結果進行比較，結果證明本文模型與方法是可行的和現實的。

This paper analyses multi - stage pre - stressing and different parameters produce the impacts to static and dynamical behavior of the structure by theoretical calculation and experimental research. the conclusion can provide reference to static and seismic design of arch truss string structure. the main issues in the paper are : the multi - stage pre - stressing loading experiment is studied in this paper

本文通過理論計算和試驗研究分析了多次張拉預應力、參數設置對張弦拱桁架結構靜力、動力性能的影響，主要完成了以下幾方面的工作:進行了模擬施工過程中的多次預應力加載試驗。

Research on prestress stretching control of a large - span truss string structure

大跨度張弦桁架預應力張拉控制研究

Failure modes of two staggered truss steel framing buildings, the results indicate the plastic hinges mainly formed in truss members, especially concentrated to the vierendeel panel. it means the vierendeel panel in the center of the truss can provide significant ductility in the structural response and the failure mode is suitable for our performance services

指出分析所得的塑性鉸分布圖中，塑性鉸大量分佈在桁架腹桿和中間空腹節間弦桿處，而柱中塑性鉸發展則很少，這樣的破壞模式符合次要構件破壞，而主要受力構件基本不破壞的抗震設計思想。

The experiment results and calculation results are compared too ; the conclusion that arch truss string structure can be applied in multi - stage pre - stressing construction is achieved

得出張弦拱桁架結構隨多次加載步驟的內力、位移變化曲線。計算與試驗結果較為吻合。

The working mechanism of shear connector of the staggered - truss system between reinforced concrete plank and steel chord was analyzed based on theoretical analysis and value computational methods, and details such as reasonable styles, types and quantity of the shear connector were introduced via a calculated example

摘要為推廣應用鋼結構交錯桁架體系，採用理論分析及數值計算方法，分析了交錯桁架結構樓板與鋼弦桿連接的抗剪連接件的工作機理。