Cable Force Adjustment for Segmental Assembled Concrete Cable_Stayed Bridge Considering the Effect of Beam Weight Errors

被引：0

作者：

Fu C. ^{[1
,2
]}

Lao Y. ^{[1
]}

Xie Z. ^{[3
]}

Lin L. ^{[4
]}

Yan P. ^{[2
]}

机构：

[1] College of Civil and Transportation Engineering, Hohai University, Jiangsu, Nanjing

[2] China SWJTU Railway Development Co., Ltd., Sichuan, Chengdu

[3] The 2nd Engineering Co., Ltd., China Railway Guangzhou Engineering Group Co., Ltd., Guangdong

[4] Guangzhou Engineering Construction Headquarters of China Railway Guangzhou Group Co., Ltd., Guangdong, Guangzhou

来源：

Zhongguo Tiedao Kexue/China Railway Science | 2023年 / 44卷 / 02期

关键词：

Assembly; Beam weight error; Cable force adjustment; Concrete cable[!sup]_[!/sup]stayed bridge; Elastically supported cantilever beam; Segment;

D O I：

10.3969/j.issn.1001-4632.2023.02.07

中图分类号：

学科分类号：

摘要：

In order to reduce the linear variation caused by beam weight error of segmental assembled concrete cable_stayed bridge, the elastically supported cantilever beam method for cable force adjustment of the concrete cable_stayed bridge at construction stage is proposed. By using the method, the cables are taken as elastic supports; the main beam and the bridge tower are both taken as elastically supported cantilever beams. This method takes the elasticity supporting force of the main beam under the beam weight error effect as the vertical component of cable forces and calculates the initial cable force adjustment values of the cables; and then the adjustment is modified using deformation of tower deviation. The engineering case analysis shows that a large volume of cable force adjustment is required for the cables close to the beam segment with beam weight errors, and its value can reach up to 70 percent of the beam weight error value; while a small volume of cable force adjustment is required for the cables away, with its value being less than 5 percent of the value of beam weight error. The adjusted cable force can effectively reduce the linear variation caused by beam weight error, thus enabling the structural line shape close to the default at assembling stage. The initial value produced by the main beam supporting force occupies a large proportion of the adjustment value of cable force; while the modified value of tower deviation takes a small proportion and reduces with the increase of the cantilever length. The volume of adjustment of cable force reduces with the increase of main beam stiffness, but increases with the cable stiffness. © 2023 Chinese Academy of Railway Sciences. All rights reserved.

引用

页码：66 / 72

页数：6

共 18 条

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