桁架弦桿 的英文怎麼說
中文拼音 [héngjiàxiángǎn]
桁架弦桿
英文
chord member of truss-
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。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。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。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。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 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。分享友人