Seismic behavior of long-span concrete-filled steel tubular arch bridge subjected to near-fault fling-step motions

Xin, Lifeng; Li, Xiaozhen; Zhang, Zetian; Zhao, Lianming

doi:10.1016/j.engstruct.2018.11.006

Cited by 49 publications

(19 citation statements)

References 37 publications

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“…Therefore, this structure has plenty of virtues in terms of greater carrying capacity, higher lateral stiffness, better ductility properties, much more efficient construction and easier fabricated construction [3][4][5][6][7]. Based on the above advantages, CFT structures have been widely used in industrial plants, long-span bridges, high-rise buildings and underground structures in recent years [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns

Zhou

et al. 2020

Materials

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In order to investigate the bond behavior of preplaced aggregate concrete-filled steel tube (CFT-PAC) columns and the difference of bond behavior between CFT-PAC columns and normal concrete-filled steel tube (CFT-NC) columns, a total of 11 columns were prepared and the push-out tests were conducted. The experimental parameters included the type of concrete (preplaced aggregate concrete and normal concrete), concrete strength (C40, C50 and C60), cross-section dimension (D = 219 mm, 299 mm and 351 mm) and the thickness of steel tube (t = 6 mm and 8 mm). The results indicated that the CTF-PAC columns had a similar load-slip curves with CFT-NC columns. The bond stresses of the CFT-PAC columns were higher than that of the PAC-NC columns at the same concrete strength. Increasing compressive strength of PAC increased the critical bond strength and bond strength of CFT-PAC columns. With an increase of the L/D ratio, both of the slip corresponding to peak load and bond strength of CFT-PAC columns exhibited an increasing trend. A rise in the D/t ratio led to a decrease in the bond stress of CFT-PAC columns and an increase in slip corresponding to the peak load of CFT-PAC columns. The proposed bond stress–slip relationship model considerably matched the bond stress–slip relationship of CFT-PAC columns.

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Section: Introductionmentioning

confidence: 99%

Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns

Zhou

et al. 2020

Materials

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“…The velocity pulse effect and the high-frequency vibration are the main characteristics of near-fault earthquakes. Several scholars have studied the influence of the velocity pulse on the structural response, finding that the velocity pulse effect usually causes a larger response than the non-pulse far-field earthquake (Hajali et al, 2018; Jalali et al, 2012; Süleyman et al, 2012; Wu et al, 2014; Xin et al, 2019; Yan and Chen, 2015; Zhang et al, 2018), but most scholars pay attention to long-period structures such as high-rise buildings and large-span structures, it has been found in their researches that the velocity pulse plays a controlling role on the seismic response of these long-period structures, while the high-frequency vibration has little effect. Furthermore, it shows that the seismic response of structure under the near-fault earthquake is associated with the structural period.…”

Section: Introductionmentioning

confidence: 99%

Seismic damage features of high-speed railway simply supported bridge–track system under near-fault earthquake

Guo

Gao

et al. 2020

Advances in Structural Engineering

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Seismic loads pose a potential threat to the high-speed railway bridges in China, which have been rapidly developing in recent years, especially for those subjected to the near-fault earthquakes. The previous researches on high-speed railway bridges usually concern the far-field earthquake, and the damage of high-speed railway bridge–track system subjected to the near-fault earthquake has not been well studied. In this article, a seven-span high-speed railway simply supported bridge–track system is selected to explore the seismic damage features under the excitation of near-fault earthquake which possesses characteristics of obvious velocity pulse and high-frequency vibration. First, a detailed finite element model of the selected bridge–track system is established and calibrated by the experimental data and design code. Then the low-frequency pulse-type portion and the high-frequency background portion are separated from the selected eight original near-fault records, and a series of nonlinear dynamic analysis is conducted. The results show that the background portion leads to more serious damage of the bridge–track system than the pulse-type portion. Due to the high stiffness of high-speed railway bridge–track system, the background portion with high-frequency vibration characteristic produces the main part of seismic response of system. As for the damage part of system, the weakest component of the bridge–track system is the sliding layer, followed by the shear alveolar.

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“…There are many categorical forms of bridges in the world, currently arch bridges are highly competitive due to their advantages of large span capacity, graceful shape and reasonable structural stress [1][2][3]. According to the latest statistics, more than 600 arch bridges have been built in China.…”

Section: Introductionmentioning

confidence: 99%

Research on the Suspender Replacement Process of Arch Bridge Based on the Measured Displacement Correction

et al. 2020

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Seismic behavior of long-span concrete-filled steel tubular arch bridge subjected to near-fault fling-step motions

Cited by 49 publications

References 37 publications

Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns

Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns

Seismic damage features of high-speed railway simply supported bridge–track system under near-fault earthquake

Research on the Suspender Replacement Process of Arch Bridge Based on the Measured Displacement Correction

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