Quasi‐static test and strut‐and‐tie modeling of precast concrete shear walls with unconnected vertically distributed reinforcements

Xiao, Xu; Cao, Zhiwei; Zhang, Shiqian; Liao, Xiandong

doi:10.1002/suco.202000731

Cited by 10 publications

(3 citation statements)

References 27 publications

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“…As the STM method was based on the lower‐bound of plasticity theory, which led to conservative analytical results, it was appropriate to be applied in practical engineering. Since the STM was first proposed by Ritter, 7 many researchers have used this method to analyze the mechanical behavior of structures such as deep beam, 8–10 dapped end beam, 11–13 and wall 14,15 . However, there are limited studies on the bridge tower in cable‐stayed bridge by the STM method.…”

Section: Introductionmentioning

confidence: 99%

“…Since the STM was first proposed by Ritter, 7 many researchers have used this method to analyze the mechanical behavior of structures such as deep beam, [8][9][10] dapped end beam, [11][12][13] and wall. 14,15 However, there are limited studies on the bridge tower in cable-stayed bridge by the STM method. Finite element analysis (FEA) and experimental model test were the main methods to investigate the mechanical performance of the structures, which were time-consuming and inefficient.…”

mentioning

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%

mentioning

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 vertical connection forms of prefabricated shear wall structures could significantly influence the overall performance of the structures. Consequently, the researchers have paid more attention to the connection of the precast shear wall structures (Lu et al, 2016; Peng et al, 2020; Su et al, 2021; Wang et al, 2022; Xiao et al, 2021). More recently, due to several advantages, including controllable tolerance, accelerated construction and environmental friendliness, the grouted sleeve connector has attracted the interest of researchers and engineers (Lu et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on seismic behaviors of precast concrete shear walls with sleeve grouting defects

Yang

Guo

Wang

et al. 2022

Advances in Structural Engineering

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The grouted sleeve connector is one of the most widely used connections in precast concrete shear wall structures. Due to the technology limit of the assembly workers, the sleeve grouting often has defects, which could significantly weaken their practical performance. Only considering the effect of defects on the bearing capacity of the sleeve connector cannot simulate the effect of defects in actual engineering. To this end, an experiment was carried out to investigate the seismic performance of precast concrete shear walls with sleeve grouting defects. Four full-scale precast concrete shear walls with different defect levels of insufficient grouting were designed and tested under cyclic loads. The development of concrete cracking, failure mode, hysteresis features, load-bearing capacity, stiffness degradation, structural ductility and energy-dissipation capacity are analyzed to reveal the influence of the sleeve grouting defects on precast concrete shear walls. The test results indicated that with the increase of the defect level, the opening gap between the bottom of the wall and the top of the foundation beam widened, and the failure mode changed from tensile fracture of reinforcing steel bar to anchorage failure of the tensile reinforcement on the defective side. Meanwhile, as the level of grouting defects increased, the bearing capacity decreased, and the specimen failed prematurely. The effect of the grouting defects on cracking load was minor, while they had a significant influence on the yield bearing capacity, peak bearing capacity and ultimate bearing capacity. The experimental results also indicated that the grouting defects caused the weakening of the stiffness, ductility and energy dissipation of the precast concrete shear walls. The presented work could be used for defect prevention and evaluation of precast concrete shear walls with sleeve grouting defects.

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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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Quasi‐static test and strut‐and‐tie modeling of precast concrete shear walls with unconnected vertically distributed reinforcements

Cited by 10 publications

References 27 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

Experimental investigation on seismic behaviors of precast concrete shear walls with sleeve grouting defects

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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