Seismic stability analysis of the large-span concrete-filled steel tube arch bridge considering the long-term effects

Han, Xu; Han, Bing; Xie, Huibing; Yan, Wu; Yu, Jing; He, Yikuan; Yan, Longbiao

doi:10.1016/j.engstruct.2022.114744

Cited by 12 publications

(6 citation statements)

References 34 publications

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“…Consequently, the diameter of CFST components in bridges has reached 1.9 m (Sun and Xie, 2019). Large-diameter CFST columns are also preferred in transmission towers (Han et al, 2022). It is reported that 2.1 m-dia.…”

Section: Introductionmentioning

confidence: 99%

“…Due to agreed ductile behavior, high load-bearing capacity and ease of construction (Han et al, 2022), concrete-filled steel tube (CFST) components have been widely adapted to high-rise buildings (Wu et al, 2023), large-span arch bridges (Han et al, 2022), super-tall transmission towers (Wang et al, 2019), etc. To be specific, CFST arch bridges have been extensively constructed (Chen et al, 2023), and it is expected the span would exceed 700 m (Zheng and Wang, 2017).…”

Section: Introductionmentioning

confidence: 99%

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In-situ measurements of temperature and strain fields of large-diameter concrete-filled steel tube columns and the refined finite element modeling

Liu,

Wang,

Bai

et al. 2024

Advances in Structural Engineering

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Concrete-filled steel tube (CFST) columns are prevalent in transmission towers and arch bridges due to their cost-effectiveness and superior mechanical performance. The growing megastructures lead to large-diameter CFST components, which are exposed to the risk of early-age thermal concrete cracking. In this study, temperature and strain fields of two 2.1 m-dia. CFST columns were monitored in-situ. Within 30 h, the peak temperature and tensile strain at the centroid reached 97.0°C and 400 με, respectively. Meanwhile, temperature fields of eight scaled CFST columns were also monitored and compared. In addition, ultrasonic pulse velocity test was performed to detect the early-age thermal cracking. To predict the temperature and strain evolutions accurately, a refined numerical model is proposed, considering coupled mechanical, hydration and thermal processes. It is revealed that the model could accurately predict the temperature and strain evolutions of CFST columns. Furthermore, experiments and numerical simulations illustrate that thermal cracking would likely be triggered in CFST components with diameter greater than 1.2 m.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In-situ measurements of temperature and strain fields of large-diameter concrete-filled steel tube columns and the refined finite element modeling

Liu,

Wang,

Bai

et al. 2024

Advances in Structural Engineering

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“…In the US, there is a preference for circular CFSTs in bridge systems [5], although rectangular CFSTs are used for building construction. This paper addresses circular CFSTs since they are more commonly used and tested.…”

Section: Introductionmentioning

confidence: 99%

“…Experimental studies on circular CFSTs subjected to shear loading have been conducted in China (e.g., [68]), Japan (e.g., [9]) and the US (e.g., [10,11]). These investigations cover important design parameters including (1) the compressive concrete strength, (2) the yield strength of steel (𝐹 𝑦 ), (3) the shear span-todiameter ratio (𝑎/𝐷), (4) the diameter of the CFST (𝐷), (5) the axial load ratio (𝑃/𝑃 0 ), (6) the internal reinforcement ratio (𝜌 𝑖𝑛𝑡 ), and (7) the bond condition between steel tube and concrete. The collective findings from these investigations are: (1) shear failure does not occur for 𝑎/𝐷 greater than 0.5 [6,8], (2) the shear strength increased with an increase in the 𝑃/𝑃 0 ratio [8,10], (3) composite action between the steel tube and infill concrete is needed to develop the full shear resistance [10], and (4) internal reinforcement has a much smaller contribution to the total shear capacity and in many cases can be neglected [10].…”

Section: Introductionmentioning

confidence: 99%

Evaluation and improvement of shear-strength expressions for circular concrete-filled steel tubes

Zhao¹,

Lehman²,

Zhang³

et al. 2023

JSEAM

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The accuracy of the shear resistance design equation for concrete-filled steel tubes (CFSTs) is crucial to ensure the safety of CFST structures. However, the current design equations underestimate the test data, and cannot accurately predict the relative shear resistance of the steel and concrete fill. To solve this problem, this paper developed an advanced finite element model in the LS-Dyna program, which was validated using experimental results of CFST members failing in shear. A systematic parametric study was then conducted. The result showed that the contribution of the steel increased significantly with the strain-hardening ratio (F_u/F_y) while the contribution of concrete fill was greatly influenced by the internally reinforced ratio (ρ_int) and axial load level (P/P_0). These predictions were combined with the experimental results to develop a more accurate and reliable design expression for the shear strength of circular CFSTs.

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“…However, due to the lag between theoretical research and engineering practice, many issues have been exposed in existing bridges, resulting in an adverse social impact and significant economic losses. In some cases, these issues have even led to bridges collapse and casualties [1][2][3]. With the increasingly prominent safety concerns regarding CFST arch bridges, it is necessary to assess their safety under service conditions to ensure the operational safety of these bridges.…”

Section: Introductionmentioning

confidence: 99%

Safety Assessment Method of Concrete-Filled Steel Tubular Arch Bridge by Fuzzy Analytic Hierarchy Process

Shen,

Chen,

et al. 2023

Buildings

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The concrete-filled steel tubular (CFST) arch bridge has achieved significant development in recent years due to its unique mechanical performance and technical advantages. However, due to the lagging theoretical research compared to engineering practice, many problems have been exposed in the existing bridges, resulting in adverse social impacts and enormous economic losses. With the increasing prominence of safety issues in CFST arch bridges, it is necessary to assess their safety condition in service. This paper establishes a safety assessment index system for CFST arch bridges using the fuzzy analytic hierarchy process (AHP) based on an exponential scale. The assessment method proposed includes the following main points: (1) Bridge safety assessment is closely related to the load-bearing capacity of components. This study proposes an assessment index that comprehensively considers both the defect conditions and the design load-bearing capacity of components for the safety assessment. (2) The exponential scale method is introduced to safety assessment for the first time, and the AHP based on an exponential scale is applied to calculate the component weights. (3) Considering the specific structural characteristics of CFST arch bridges, this study provides a detailed division of component types and calculates the component weights. By combining the component assessment indexes, a comprehensive safety assessment index system is established, and a safety assessment method for CFST arch bridges is proposed. (4) Taking the Jiantiao Bridge in Zhejiang Province as an engineering case, the load-bearing capacity of components is calculated using finite element software ANSYS 19.1. Based on the established safety assessment index system, the safety of the bridge is assessed by integrating the inspection results. (5) Software for the safety assessment of a CFST arch bridge is developed using Visual Basic, and the assessment results align well with the actual condition of the bridge.

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Seismic stability analysis of the large-span concrete-filled steel tube arch bridge considering the long-term effects

Cited by 12 publications

References 34 publications

In-situ measurements of temperature and strain fields of large-diameter concrete-filled steel tube columns and the refined finite element modeling

In-situ measurements of temperature and strain fields of large-diameter concrete-filled steel tube columns and the refined finite element modeling

Evaluation and improvement of shear-strength expressions for circular concrete-filled steel tubes

Safety Assessment Method of Concrete-Filled Steel Tubular Arch Bridge by Fuzzy Analytic Hierarchy Process

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