湖北國(guó)際物流樞紐中心配套工程：燕磯長(zhǎng)江大橋邊纜角度對(duì)主纜的靜力學(xué)影響

Hubei International Logistics Hub Center Supporting Project：

The Static Influence of the Angle of the Side Cable of Yanji Yangtze River Bridge on the Main Cable

ZOU Lanlin，" YU Xiao" （Wuhan University of Science and Technology， Wuhan 432300， China）

摘" 要：為了完善湖北國(guó)際物流樞紐中心的區(qū)域功能，促進(jìn)武鄂黃黃經(jīng)濟(jì)帶的發(fā)展，作為鄂州順豐花湖國(guó)際機(jī)場(chǎng)的配套工程，燕磯長(zhǎng)江大橋應(yīng)運(yùn)而生。該橋梁應(yīng)用了不同垂度四主纜懸索橋體系，是一種適用于大跨徑橋梁的結(jié)構(gòu)體系，為了探究邊纜與水平面的角度對(duì)此結(jié)構(gòu)體系受力的影響，基于有限元方法，以燕磯長(zhǎng)江大橋?yàn)樵停⒉煌吚|角度的不同垂度四主纜懸索橋模型，對(duì)比分析了不同邊纜角度下內(nèi)外主纜最大纜力、內(nèi)外纜活載分配比例、主橋豎向剛度、主塔最大軸力。研究結(jié)果表明：邊纜角度的改變對(duì)內(nèi)外主纜最大纜力、主橋豎向剛度影響不大；在邊纜角度為20°時(shí)，內(nèi)外纜活載分配比例最接近恒載分配比例；邊纜角度增加時(shí)，主塔最大軸力增加，最大增幅為17.8%；邊纜角度對(duì)不同垂度四主纜懸索橋的靜力學(xué)影響不大，在設(shè)計(jì)時(shí)應(yīng)更多考慮地質(zhì)條件、錨碇位置等實(shí)際因素。

關(guān)鍵詞：物流樞紐；不同垂度四主纜；懸索橋；邊纜角度；有限元

中圖分類號(hào)：U448.25文獻(xiàn)標(biāo)志碼：ADOI：10.13714/j.cnki.1002-3100.2023.19.012

Abstract： In order to improve the regional function of Hubei International Logistics Hub Center and promote the development of Wu'e-Huanghuang Economic Belt， Yanji Yangtze River Bridge came into being as a supporting project of Ezhou SF Huahu International Airport. The four-main cable suspension bridge system with different hangings is a structural system suitable for long-span bridges. In order to explore the influence of the angle between the side cables and the horizontal plane on the force of the structural system， based on the finite element method， the model of the four-main cable suspension bridge with different hangings at different hangings is established by taking Yanji Yangtze River Bridge as the prototype. The maximum cable force， live load distribution ratio， vertical stiffness of the main bridge and maximum axial force of the main tower under different side cable angles were compared and analyzed. The results show that the change of edge cable angle has little effect on the maximum cable force of inner and outer main cables and the vertical stiffness of the main bridge. When the edge cable angle is 20°， the live load distribution ratio of inner and outer cables is closest to the dead load distribution ratio. When the edge cable angle increases， the maximum axial force of the main tower increases by 17.8%. The side cable angle has little influence on the statics of four-main cable suspension Bridges with different sag， so more practical factors such as geological conditions and anchorage position should be considered in the design.

Key words： logistics hub; four main cables of different droops; suspension bridge; edge cable angle; the finite element

隨著經(jīng)濟(jì)的不斷發(fā)展，我國(guó)對(duì)物流行業(yè)的運(yùn)輸速度越來(lái)越高，隨著一大批物流貨運(yùn)機(jī)場(chǎng)的建成，機(jī)場(chǎng)附近的大跨徑橋梁的修建成為一大問(wèn)題。由于主塔的高度受限，大跨度橋梁的建設(shè)受到制約。隨著跨徑的增大，懸索橋的主纜、主塔、錨碇的規(guī)模也越來(lái)越大，造價(jià)越來(lái)越高[1-2]，這使得傳統(tǒng)結(jié)構(gòu)的懸索橋在一些航空限高地區(qū)并不適用。針對(duì)這一情況，提出了一種不同垂度四主纜的新型懸索橋結(jié)構(gòu)體系。……