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Optimal Displacement Control Method for Cantilevered Construction of Cable-Stayed Bridges

A control method and technology of cable-stayed bridges, applied in the field of transportation bridge and culvert engineering, can solve the problems of uniform effects, cumbersome work, low efficiency, etc., and achieve the effects of wide application range, ensuring traffic efficiency, and increasing service life

Active Publication Date: 2022-05-17
GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For cable-stayed bridges, the second or third cable adjustment is generally required by default, but the effect is the same, that is, the work is cumbersome and inefficient. Since the bridge deck construction is completed, the overall stiffness is much greater than that of the cantilevered construction section. Through Adjusting the cable force to adjust the line shape has little effect

Method used

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  • Optimal Displacement Control Method for Cantilevered Construction of Cable-Stayed Bridges
  • Optimal Displacement Control Method for Cantilevered Construction of Cable-Stayed Bridges
  • Optimal Displacement Control Method for Cantilevered Construction of Cable-Stayed Bridges

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Embodiment

[0047] A cable-stayed bridge has a total length of 330m, and the bridge span is composed of 2×165m. A cable-stayed bridge is designed as a single-tower cable-stayed bridge with double cable planes. The main girder is a steel box girder with a height of 3.5m and a width of 36m. It is a semi-floating system. , standard strength 1960MPa. There are 136 stay cables in the whole bridge, 17 kinds of specifications; the stay cable area is 4200mm 2 、4340mm 2 、4620mm 2 、5054mm 2 、5600mm 2 、6020mm 2 、6440mm 2 、6860mm 2 、7280mm 2 、7770mm 2 、7980mm 2 、8260mm 2 、8820mm 2 、9240mm 2 、9800mm 2 、10640mm 2 、11340mm 2 、4200mm 2 . This project adopts the above-mentioned optimal displacement cable-stayed bridge cantilever construction control method for optimization analysis. Calculation model see figure 2 Shown; the displacement change curve during the construction process is shown in image 3 Shown; the cable stress change curve during the construction process is shown in ...

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Abstract

The invention discloses a control method for cantilevered construction of a cable-stayed bridge with optimal displacement. By strictly controlling the displacement in the cantilevered construction section of the cable-stayed bridge, the displacement of the deck girder of the cable-stayed bridge during the cantilevered process is realized. The construction control method with the smallest change rate, convergent displacement after the completion of the bridge and no need for secondary cable adjustment, has little disturbance to the already stretched stay cables, which is conducive to the control of construction accuracy and the reduction of fatigue damage of stay cables and bridges ; After the bridge is completed, the cable force of the cable stays is uniform, and there will be no sudden phenomenon of cable force distribution, which will affect the overall stress, increase the service life of the cable stays, and reduce maintenance costs; compared with the traditional control method, this method The obtained optimization results are more reliable and can effectively guide the construction.

Description

technical field [0001] The invention relates to the technical field of transportation bridge and culvert engineering, in particular to a control method for cantilevered construction of a cable-stayed bridge with optimal displacement. Background technique [0002] The cable-stayed bridge is a statically indeterminate system composed of cable-stayed cables, tower columns and bridge deck girders. It has a large spanning capacity, light girders, beautiful lines and various shapes. It is the first choice for municipal bridges that pursue landscape and artistic beauty. The general construction method of the bridge deck system of cable-stayed bridges is mostly the cantilever method. By adjusting the cable force of the cable-stayed bridges, the bridge deck is smooth after completion. Disassembly and assembly iterative analysis. Secondly, due to the cumbersome construction process of the cable-stayed bridge, the requirements for displacement control are very strict. If the displacem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F30/23G06F111/04G06F119/14
CPCG06F30/13G06F30/23G06F2111/04G06F2119/14
Inventor 姚鑫玉马耀宗李玉彬于孟生谢军邝瑜琨
Owner GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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