[1]彭晶蓉,贺拴海,李尧.基于索梁活载比的部分斜拉桥布索形式比较[J].深圳大学学报理工版,2017,34(No.5(441-550)):482-487.
 Peng Jingrong,He Shuanhai,and Li Yao.Comparison of cable designs based on the distribution ratio between cable and beam of extra-dosed bridge[J].Journal of Shenzhen University Science and Engineering,2017,34(No.5(441-550)):482-487.
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基于索梁活载比的部分斜拉桥布索形式比较()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第34卷
期数:
2017年No.5(441-550)
页码:
482-487
栏目:
土木建筑工程
出版日期:
2017-09-30

文章信息/Info

Title:
Comparison of cable designs based on the distribution ratio between cable and beam of extra-dosed bridge
作者:
彭晶蓉1贺拴海1李尧2
1) 长安大学公路学院,陕西西安710064;2)中交第一公路勘察设计研究院有限公司,陕西西安710064
Author(s):
Peng Jingrong He Shuanhai and Li Yao
1) School of Highway, Chang’an University, Xi’an 710064, Shaanxi Province, P.R.China2) CCCC First Highway Consultants Co.ltd, Xi’an 710075, Shaanxi Province, P.R.China
关键词:
桥梁工程部分斜拉桥布索方式辐射形扇形竖琴形索梁活载比用索量
Keywords:
bridge engineering extra-dosed bridge cable layoutradiating layout fan layout harp layout distribution ratio cable quantity
文献标志码:
A
摘要:
推导部分斜拉桥刚构体系索梁活载比简化计算公式,对不同的布索方式提出了用索量的概念.部分斜拉桥结构的斜拉索与主梁夹角越大(不大于54.74°)时,斜拉索分担的竖向荷载较大,故辐射形布索方式的索梁活载比最大、扇形次之、竖琴形布置最小;而对应的斜拉索的总长度辐射形最长、扇形次之、竖琴形最短.可推断,在结构初步设计尺寸确定的情况下,以用索量为目标可挑选出最为经济的布索方式.以某部分斜拉桥为工程背景,建立3种布索形式的有限元计算模型,结果表明,为达到预期的索梁活载比,辐射形布索方式用索量最少;扇形次之,比辐射形多25%;竖琴形最多,比辐射形多81%.有限元结果与简化计算公式结果规律一致,数值仅差8%.
Abstract:
The formula of live load ratio between the cable and beam for the rigid system extra-dosed bridge is derived, and the concept of cable quantity is put forward for different cable layout. For extra-dosed bridge, the larger the angle between cable and girder is (less than 54.74°), the more live load bear by cables, so the ratio of radiating layout is the maximum, then the fan layout, and the ratio of harp layout is the minimum. However, the total length for three cable layouts is exactly opposite. Therefore, when the initial design of the extra-dosed bridge is completed, the most economical cable layout can be chosen based on the cable quantity. Finite element models of three cable layouts for an extra-dosed bridge are set up, and the results show that in order to achieve the live load ratio between the cable and beam, the least cable quantity is the radiating cable layout, then the fan layout which is 14 percent more than radiating cable layout, and the most cable quantity is the harp layout cable which is 81 percent more than radiating cable layout. The finite element analysis results are consistent with the simplified formula, and the difference is 8%.

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更新日期/Last Update: 2017-09-11