Investigation of the <scp>strut‐and‐tie</scp> model of a two‐plane <scp>cable‐stayed</scp> bridge tower under vertical component of the cable force

Li, Shengyu; Hong, Yu; Huang, Shengqian; Pu, Qianhui

doi:10.1002/suco.202100042

Cited by 6 publications

(1 citation statement)

References 12 publications

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“…It implies that the effect of the vertical component of the cable force on the mechanical performance of the structure could not be ignored. Using an STM, Li et al 18 has investigated the STM of a two‐plane cable‐stayed bridge tower under vertical component of the cable force, and presented different STMs configuration based on the horizontal spacing of the cable forces. However, the influence of vertical spacing of the cable forces on the mechanical behavior of the bridge tower was not studied.…”

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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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%

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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Complex stress mechanism and design method of urban rail prestressed concrete U‐beams based on finite element simulation

Wang,

Sun

et al. 2024

Concurrency and Computation

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SummaryTo explore the complex stress mechanism of prestressed concrete U‐beams in urban rail transit, in order to improve the safety of urban rail transit construction and the economy of beam structures. The study first analyzed the complex stress mechanism of U‐beams and obtained a tension compression rod model through finite element analysis. Then, experimental research was conducted on the vertical three‐dimensional finite element stress of U‐beams, and strain cloud maps were obtained and compared with calculated values. The experimental data show that the beam can still recover to its original state after the second cycle, and the beam will not crack. This recovery mechanism means that U‐beams have high crack resistance and stability under complex stress processes. In the vertical deformation cloud map of the U‐beam, the deflection of the mid span section is the largest, with a maximum displacement of about 20.4 mm, which is very close to the measured value of 20.3 mm. In the measured data of concrete strain measuring points and the results of finite element calculation, the difference rate between measured values and calculated values of some measuring points is within 10%. The results indicate that the U‐shaped beam tension and compression rod model combined with finite element analysis has a high degree of conformity with the actual situation, and can provide technical reference for the construction of urban rail transit. The stress mechanism and design method proposed in the study have high reliability and are suitable for the design and construction of prestressed concrete U‐beams in urban rail transit construction.

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

Cited by 6 publications

References 12 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

Complex stress mechanism and design method of urban rail prestressed concrete U‐beams based on finite element simulation

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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