Structural change monitoring of a cable-stayed bridge by time-series modeling of the global thermal deformation acquired by GPS

Le, Hien Van; Nishio, Mayuko

doi:10.1007/s13349-019-00360-9

Cited by 21 publications

(6 citation statements)

References 11 publications

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“…These patterns were then applied to possible damage detection of the bridge components. Similar studies have also been conducted by Yang et al (2018b; 2018a), Zhu and Meng (2017), Wang and Ye (2019), Le and Nishio (2015, 2019), Cao et al (2010), Huang et al (2018a), Li et al (2019), and Wang and Ye (2019). These studies on the temperature actions of cable-stayed bridges are summarized in Table 8.…”

Section: Temperature Actionsmentioning

confidence: 69%

Thermal behaviors of bridges — A literature review

Chen

Zhou

et al. 2023

Advances in Structural Engineering

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This work provides a comprehensive review of previous studies concerning the static thermal behaviors of various types of bridges, including beam bridges, arch bridges, cable-stayed, and suspension bridges. Given that thermal behaviors are closely associated with the temperature distribution of bridges, the basis of the heat transfer analysis is briefly introduced first. The studies of the temperature distribution and the temperature actions of each type of bridge are then reviewed from the perspective of theoretical analysis, numerical simulation, experimental tests, and field monitoring. Finally, some existing problems are discussed, and future research topics are recommended.

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Section: Temperature Actionsmentioning

confidence: 69%

Thermal behaviors of bridges — A literature review

Chen

Zhou

et al. 2023

Advances in Structural Engineering

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“…A strong linear correlation between the girder deflection and structural temperature of a combined highway and railway cable-stayed bridge was studied by Yang et al (2018a). The mid-span was found to deflect downward with increasing temperature; however, this finding contradicts other researchers’ observations that the mid-span would move upward when the temperature increases for cable-stayed bridges (Le and Nishio, 2019; Yang et al, 2018a, 2018b; Zhou and Sun, 2019a). Practical multivariate linear models or machine learning-based networks have been proposed to separate or predict the temperature-induced girder deflection of cable-stayed bridges (Xu et al, 2019, 2020; Yue et al, 2021).…”

Section: Introductionmentioning

confidence: 94%

Temperature behavior of cable-stayed bridges. Part II — temperature actions by using unified analysis

Shan

Qiang²,

et al. 2023

Advances in Structural Engineering

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The temperature action of long-span cable-stayed bridges is complicated because of the high indeterminacy of their structure. Previous studies on the temperature behavior of bridges were either limited by finite sensors, failing to capture the accurate relation between the temperature field and temperature-induced responses, or constrained to a “divide-and-conquer” strategy, requiring considerable manual intervention and regarded as computationally inefficient. This study develops a unified approach to the investigation of thermal behaviors of cable-stayed bridges by integrating the heat-transfer analysis and structural analysis based on the same refined global 3D finite element model. The companion paper (Part I) investigates the temperature distribution, while this paper (Part II) focuses on temperature-induced responses. The temperature distribution data is automatically converted to thermal loads, and thermal elements are changed to structural elements to calculate the temperature-induced responses of the bridge. Results show that the effect of the temperature variation of cables is nonnegligible and should be taken into account during the structural analysis. The longitudinal displacement of the girder and the longitudinal displacement of the tower top are mainly influenced by the average girder temperature, the mid-span deflection and the cable stress are dominated by the cable temperature and average girder temperature, and the stress of the girder is controlled by the vertical temperature difference. The ratio of the thermal stress to the dead load stress of the girder can reach 96%. The calculated displacement and stress of the bridge agree well with the corresponding measurements, consequently verifying the effectiveness of the proposed unified approach to calculating temperature-induced responses.

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“…An idealized finite element model of the three-span continuous cable-stayed bridge is considered for the numerical investigation explored in the past by the research fraternity [17,18]. The bridge length is 470m (110m+250m+110m).…”

Section: 200mentioning

confidence: 99%

“…Assuming it is a rubber bearing, an effective stiffness of 7×10 5 kN/m in the horizontal direction is provided, whereas it is rigid in the vertical direction. As explained above, the ULF method determines the geometric stiffness and initial cable tensions [17,18]. For the present model validation first natural fundamental period, cable tension in cable C 2 , and deck displacement are compared with a similar published study.…”

Section: 200mentioning

confidence: 99%

Seismic behavior of cable-stayed bridges under strong ground motions

Vern,

Paolacci,

Nascimbene

2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Seismic behavior analysis of the long-span cable-stayed bridge is a complex process involving different uncertainties. This paper performs a sensitivity analysis of cable-stayed bridges using the finite element method on Midas/Civil. They include different types of ground motions scaled to different peak ground acceleration (PGA) levels, the effect of the multi-support excitations due to time-lag propagation or nonsynchronous excitations, and the effect of the angle of the incidence of the earthquake is determined. To evaluate the optimum initial cable prestress forces in cables unknown load factors method is used. The response quantities of interest include the displacement of the tower and deck, variation in prestress force in cables, torsional in the deck, shear force, and bending moment at the supports. Results show that the effect of the PGA variation and angle of incidence of the earthquake is moderate. In contrast, the synchronous and nonsynchronous seismic excitation effect on the response quantities is significant.

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Structural change monitoring of a cable-stayed bridge by time-series modeling of the global thermal deformation acquired by GPS

Cited by 21 publications

References 11 publications

Thermal behaviors of bridges — A literature review

Thermal behaviors of bridges — A literature review

Temperature behavior of cable-stayed bridges. Part II — temperature actions by using unified analysis

Seismic behavior of cable-stayed bridges under strong ground motions

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