Optimization of Cable Tensioning in Cable-Stayed Bridges

Janjic, Dorian; Pircher, Martin; Pircher, Heinz

doi:10.1061/(asce)1084-0702(2003)8:3(131)

Cited by 104 publications

(26 citation statements)

References 15 publications

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“…By optimising tensioning of stay cables during erection (Chen et al, 2000;Janjic et al, 2003), stay cables 1-21 were stressed to their final state and cables 22, 23 and 24 (both in the side and middle spans) were tensioned to 70%, 60% and 50% of their final forces, respectively. This reduced the deck deformations to 0·62 m higher than the final alignment with an angle of only 0·007°, meeting the closure precision for high-strength bolt connection.…”

Section: Innovative Construction Solutionmentioning

confidence: 99%

Yachihe Bridge, China: engineering the world’s longest cable-stayed steel truss

YuXiangmin

ChenDewei

XueMenggui

2018

Proceedings of the Institution of Civil Engineers - Civil Engin

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The bridge is a hybrid cable-stayed structure (Figure 2). The 800 m main span is a steel-truss deck and the side spans are twin-box concrete girders 27·7 m wide and 8·2 m deep. The pylons are 'H' shaped with heights of 243 m and 258 m on the Guiyang and Qianxi sides, respectively. IntroductionYachihe Bridge has set a new record as the world's longest steeltruss cable-stayed bridge (Figure 1) Yachihe Bridge in China is the longest steel-truss, cable-stayed bridge in the world and the tenth longest overall. Completed in 2016, its 800 m main span carries the new Guiyang-Qianxi dual carriageway over the Yachihe River gorge. It is also the first cable-stayed bridge to be erected using a cable crane, and its concrete-box-girder side spans feature the first use of cable anchorages in the middle of the outer web. Furthermore, geometry alignment during deck closure was achieved by adjusting cable forces rather than by using counterweights. This paper describes the configuration and numerical analysis of the innovative cable anchorage, discusses the challenges and solutions involved in using a cable crane for construction and details the novel closure techniques adopted for the steel-truss deck. Proceedings of the Institution of Civil EngineersCivil Engineering 171 February 2018

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Section: Innovative Construction Solutionmentioning

confidence: 99%

Yachihe Bridge, China: engineering the world’s longest cable-stayed steel truss

YuXiangmin

ChenDewei

XueMenggui

2018

Proceedings of the Institution of Civil Engineers - Civil Engin

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“…Sci. 2016, 6, 231 7 of 21 behavior of cable-stayed bridges [16,17]. This program, which is widely used in analyzing long-span cable-stayed, can simulate the cable nonlinear effect, P-delta effect, and the construction sequence of cable-stayed bridges easily by simple beam elements and cable elements.…”

Section: Bridge Modelsmentioning

confidence: 99%

Structural Behavior of a Long-Span Partially Earth-Anchored Cable-Stayed Bridge during Installation of a Key Segment by Thermal Prestressing

Kim

Won

2016

Applied Sciences

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This study investigated structural behavior of long-span partially earth-anchored cable-stayed bridges with a main span length of 810 m that use a new key segment closing method based on a thermal prestressing technique. A detailed construction sequence analysis matched with the free cantilever method (FCM) was performed using a three-dimensional finite element (FE) model of a partially earth-anchored cable-stayed bridge. The new method offers an effective way of connecting key segments by avoiding large movements resulting from the removal of the longitudinal restraint owing to the asymmetry of axial forces in the girders near the pylons. The new method develops new member forces through the process of heating the cantilever system before installing the key segment and cooling the system continuously after installing key segments. The resulting forces developed by the thermal process enhance the structural behavior of partially earth-anchored cable-stayed bridges owing to decreased axial forces in the girders.

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“…These post-tensioning functions are defined by B-spline curves. (6) The Unit Load Method (Janjic et al 2002(Janjic et al , 2003. This criterion is based on a linear system of equations that includes a degree of freedom for each stay cable force.…”

Section: Introductionmentioning

confidence: 99%

Structural behavior of non-symmetrical steel cable-stayed bridges

Jorquera-Lucerga¹,

Galant²,

Coderque³

2016

Steel Compos. Struct.

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Abstract. Despite of the growing number of built examples, the analysis of non-symmetrical cable-stayed bridges has not received considerable attention from the researchers. In fact, the effects of the main design parameters in the structural behavior of these bridges are not addressed in detail in the literature. To fill this gap, this paper studies the structural response of a number of non-symmetrical cable-stayed bridges. With this aim, a parametric analysis is performed to evaluate the effect of each of the main design parameters (the ratio between the main and the back span length, the pylon, the deck and backstay stiffnesses, the pylon inclination, and the stay configuration) of this kind of bridges. Furthermore, the role of the geometrical nonlinearity and the steel consumption in stays are evaluated.

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Optimization of Cable Tensioning in Cable-Stayed Bridges

Cited by 104 publications

References 15 publications

Yachihe Bridge, China: engineering the world’s longest cable-stayed steel truss

Yachihe Bridge, China: engineering the world’s longest cable-stayed steel truss

Structural Behavior of a Long-Span Partially Earth-Anchored Cable-Stayed Bridge during Installation of a Key Segment by Thermal Prestressing

Structural behavior of non-symmetrical steel cable-stayed bridges

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