Strut-and-Tie Model-Based Prestress Design for the Cable–Pylon Anchorage Zone of Cable-Stayed Bridges

Li, Shengyu; Lim, Erwin; Shen, Linbai; Hong, Yu; Pu, Qianhui

doi:10.1061/(asce)be.1943-5592.0001771

Cited by 14 publications

(3 citation statements)

References 24 publications

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“…Su et al 16 pointed out that considerable local deformation of bridge tower occurred under the action of the horizontal component of the inclined cable force, and the influence of the horizontal component of cable force on the mechanical performance of the bridge tower should be concerned. Li et al 1 proposed the STM of the one‐box two‐cell anchorage zone of the bridge tower in cable‐stayed bridge under the horizontal component of cable force, and presented detailed arrangement of the prestressed strands in the structure based on the STM method. In addition, using an STM, Cui and Huang 17 analyzed the structural behavior of the bridge tower in a cable‐stayed bridge under the influence of the horizontal components of the cable forces, and investigated the influence of the thickness of front wall on the STM configuration of the structure.…”

Section: Introductionmentioning

confidence: 99%

“…However, the concrete bridge was subjected to large cable forces, which may result in crack of the structure. The prestressed strands were installed in the bridge tower to prevent its crack 1 . However, disturbed regions (D‐regions), in which the stress distribution is nonlinear and the plane section assumption is no longer applicable, develop typically in the concrete bridge towers.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the strut‐and‐tie model of a single‐plane cable‐stayed bridge tower under vertical component of the cable force

Hong

Chen

et al. 2023

Structural Concrete

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The design of reinforcement of concrete pylons in cable‐stayed bridges is a challenging task. Usually, only the influence of the strong horizontal component of the cable force is considered during the reinforcement design of the concrete tower, while the bursting forces caused by the vertical components of the cable forces are ignored. However, the latter is also an important factor for concrete cracking in bridge towers. In this paper, the concrete tower of a single cable plane cable‐stayed bridge is considered. The strut‐and‐tie model (STM) of the pylon wall subject to the vertical components of one single cable force was derived. Based on the minimum strain energy principle, an equation for predicting the bursting force was given. Then, the STMs of a concrete pylon with two cable forces with different vertical distances between cables were proposed. A series of equations for predicting the bursting force in different STMs were presented. The STMs of a concrete pylon with multiple cables were subsequently obtained from the STM for two cable forces. The analysis results show that the vertical distance between cables has a great influence on the STM configuration of the tower. When the cable distance is less than 0.7 times the width of the tower wall, the bursting force is larger than that when the cable distance is larger than 0.7 times the width of the tower wall. This study was expected to provide a reference in the design and applications of pylons of concrete cable‐stayed bridges.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of the strut‐and‐tie model of a single‐plane cable‐stayed bridge tower under vertical component of the cable force

Hong

Chen

et al. 2023

Structural Concrete

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“…1 Project Overview A cable-stayed bridge is a structural system composed of three fundamental components: pylon, girders and cables [1,2]. With the rapid growth of large-span bridge development in China, cable-stayed bridges have swiftly evolved and gained popularity thanks to their visually appealing designs and excellent spanning capacity, particularly single-pylon cable-stayed bridges, which have emerged as highly competitive options for urban bridges ranging from 100 to 300 m in length [3,4].…”

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confidence: 99%

Structural Design and Static Analysis of the Cable-stayed Bridge on Xuefu Road

Wang

2023

Prestress Technology

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The cable-stayed bridge on Xuefu Road is a single-pylon spatial double-cable-plane cable-stayed structure with a main span of 160 m. The main girder is a PK-section flat steel box girder, while the main pylon is made from reinforced concrete. With a width ranging from 46.1 to 57.5 m, it is currently the widest single-pylon cable-stayed bridge with steel box girder in China. A comprehensive review has been conducted on the structural design and static analysis of the cable-stayed bridge on Xuefu Road, which can provide a reference for future projects of a similar nature.

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Simplified method for predicting the internal forces in strut‐and‐tie model of cable pylon anchorage zone in a cable‐stayed bridge

Li,

Lim,

Chen

et al. 2024

Structural Concrete

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The mechanical behavior of cable pylon anchorage zone in a cable‐stayed bridge is complex due to high localized stresses. A strut‐and‐tie model (STM) has been introduced in this paper, which is recommended as an efficient way to analyze the disturbed region. However, predicting the internal forces in the tie members in the STM by integrating stresses was time‐consuming and inefficient. To address this issue, the principle of minimum strain energy was used to analyze the STM of the cable pylon anchorage zone. A simplified method was presented to assess the internal forces in the cable pylon anchorage zone. Moreover, an actual bridge (Cao'e River Bridge) was employed to be analyzed, and the prestressed steel strands in the bridge were obtained by the simplified method. A full‐scale test model of the bridge was fabricated to validate the accuracy of the simplified method. Furthermore, based on the simplified method, the effect of the thickness of front wall, the length of inner opening straight section, the thickness of side wall, the thickness of inner wall and the width of inner opening straight section on the internal force in the tie members in the STM was studied. The results show that the length of inner opening straight section has negligible effect on the internal forces in all tie members. Compared with the thickness of the side wall, the thickness of inner wall and the width of inner opening straight section have limited effect on the internal force of tie members. This study was expected to promote the design of cable pylon anchorage zone.

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Strut-and-Tie Model-Based Prestress Design for the Cable–Pylon Anchorage Zone of Cable-Stayed Bridges

Cited by 14 publications

References 24 publications

Investigation of the strut‐and‐tie model of a single‐plane cable‐stayed bridge tower under vertical component of the cable force

Investigation of the strut‐and‐tie model of a single‐plane cable‐stayed bridge tower under vertical component of the cable force

Structural Design and Static Analysis of the Cable-stayed Bridge on Xuefu Road

Simplified method for predicting the internal forces in strut‐and‐tie model of cable pylon anchorage zone in a cable‐stayed bridge

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