Influence of seasonal freezing on dynamic bridge characteristics using in-situ monitoring data

Plotnikova, Anastasiia; Wotherspoon, Liam; Beskhyroun, Sherif; Yang, Zhaohui

doi:10.1016/j.coldregions.2019.02.006

Cited by 9 publications

(5 citation statements)

References 26 publications

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“…This may not only affect the usability and comfort of the bridge but also pose a threat to the structural safety of the bridge. To analyze the influence of the changes in structural parameters on the dynamical properties of the bridge, the rigidity of the steel truss, the rigidity of the cable, the stiffness of the pylon, and the position of the auxiliary pier have changed now [28][29][30][31][32][33][34][35][36][37][38]. For the convenience of illustration, the first 10 order modes of the bridge are numbered as M1~M10.…”

Section: Sensitivity Analysis Of the Fem Parametersmentioning

confidence: 99%

Study on Dynamic Characteristics of Long-Span Highway-Rail Double-Tower Cable-Stayed Bridge

Guo,

Jiang,

Zhang

et al. 2024

Buildings

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The long-span dual-purpose highway-rail double-tower cable-stayed bridge has the characteristics of a large span and large load-bearing capacity. Compared with the traditional cable-stayed bridge, its wind resistance and seismic resistance are weaker, and the dynamic characteristics of the bridge are closely related to the wind resistance and seismic bearing capacity of the bridge. This study investigated the influence of the variations of bridge member parameters on the dynamic characteristics of the bridge and then improved the dynamic characteristics of the bridge. To provide the necessary experimental theory for the research work of the long-span dual-purpose highway-rail double-tower cable-stayed bridges, this paper takes the world’s longest span of the dual-purpose highway-rail double-tower cable-stayed bridge as the background, using the finite element analysis software Midas Civil 2022 v1.2 to establish a three-dimensional model of the whole bridge by changing the steel truss beam stiffness, cable stiffness, pylon stiffness, and auxiliary pier position, as well as study the influence of parameter changes on the dynamic characteristics of the bridge. The results show that the dynamic characteristics of the bridge can be enhanced by increasing the stiffness of the steel truss beam, the cable, and the tower. The stiffness of the steel truss beam mainly affects the transverse bending stiffness and flexural coupling stiffness of the bridge. The influence of cable stiffness is weak. The tower stiffness can comprehensively affect the flexural stiffness and torsional stiffness of the bridge. The position of auxiliary piers should be determined comprehensively according to the site conditions. In practical engineering, the stiffness of components can be enhanced according to the weak links of bridges to improve the dynamic characteristics of bridges and save costs.

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Section: Sensitivity Analysis Of the Fem Parametersmentioning

confidence: 99%

Study on Dynamic Characteristics of Long-Span Highway-Rail Double-Tower Cable-Stayed Bridge

Guo,

Jiang,

Zhang

et al. 2024

Buildings

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“…The behavior of the abutments was simulated by considering the contributions made by the filled soils and piles, according to the method recommended by Caltrans [42,46]. For those bridges in the northern coastal areas of China, deterioration of RC columns is the primary reason causing the significant degradation in their structural resistance [15,17]. Therefore, this paper mainly studied the deterioration impacts caused by freeze-thaw cycling on the columns.…”

Section: Bridge Description and Fe Modelingmentioning

confidence: 99%

“…Niu et al [13] explored the variations in the compressive strength, flexural strength, and the relative dynamic elastic modulus of concrete through the extreme freeze-thaw tests. Although many scholars have experimentally explored the effect of freeze-thaw cycling process on the mechanical properties of concrete and seismic performance of RC structures [1,3,[14][15][16][17], the constructed freeze-thaw deterioration models are only obtained through several given test results, which may have certain contingency limitations. In addition, dimensions of the specimens are different, and the testing methods are also varied.…”

Section: Introductionmentioning

confidence: 99%

Seismic Fragility Assessment of RC Columns Exposed to the Freeze-Thaw Damage

et al. 2023

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Freeze–thaw damage is one of the primary causes deteriorating the seismic resistance of reinforced concrete (RC) structures. This paper proposed a freeze–thaw damage deterioration model for C30 concrete, and it can be employed to study the time-varying seismic performance of aging RC columns. Next, this study developed a seismic fragility analysis framework for deteriorating RC columns considering the effect of freeze–thaw damage. Considering the geometric parameters of the case-study bridge, the deterioration characteristics of material, and the uncertainties involved in structural modeling and ground motions, a probabilistic seismic fragility analysis on aging RC columns was conducted. The results indicate that the influence of freeze–thaw damage cannot be ignored in studying the seismic performance of aging RC structures. The seismic fragilities of deteriorating RC columns shown a nonlinear increase trend as the increased of freeze–thaw cycles and severity of the damage state. In the early stage of freeze–thaw cycles, the seismic fragilities of RC columns increased slowly. However, the closer to the later stage of freeze–thaw cycles, the more significant of the increase in the seismic fragilities of the columns.

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“…Through finite element modeling, the dynamic characteristics of bridges can be optimized by modifying different bridge parameters [5][6][7][8][9]. For example, the stiffness [10,11] of each member of a bridge, the constraint conditions [12] of different members and pylons, the influence of concentrated force [13], and the position of auxiliary piers [14] will have a certain impact on the dynamic characteristics of the bridge.…”

Section: Introductionmentioning

confidence: 99%

Modal Analysis of a Steel Truss Girder Cable-Stayed Bridge with Single Tower and Single Cable Plane

et al. 2022

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The dynamic characteristics of bridge structures are important in wind stability analysis, seismic design, fatigue assessment, health inspection, and maintenance of bridge structures; however, the mechanical and dynamic properties of different bridge types are different. A long-span cable-stayed bridge has the advantages of large flexibility, long natural vibration period, low natural frequency, dense spectrum, and denser modal than those of general structures. In this paper, the dynamic characteristics of a cable-stayed bridge with single pylon and single cable plane in the maximum cantilever stage and the complete bridge are analyzed. The single-tower cable-stayed bridge has some unique characteristics, such as lower cost, and a more beautiful appearance, but its torsional rigidity is lower, which increases the risk of wind damage and earthquake damage. Therefore, a finite element analysis of this bridge in the maximum cantilever state is carried out, and the influences of the main components’ rigidity, the inclination angles of the stayed cables, the supporting conditions, and the locations of the auxiliary piers are analyzed for the sustainability of this type of cable-stayed bridge. The analysis results show that a cable-stayed bridge with single pylon and single cable plane has more flexibility, and that the lateral rigidity and torsional rigidity are smaller. Structure rigidity, dip angles of the stayed cables, and positions of the auxiliary piers all have significant influences on the dynamic characteristics of cable-stayed bridges.

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Influence of seasonal freezing on dynamic bridge characteristics using in-situ monitoring data

Cited by 9 publications

References 26 publications

Study on Dynamic Characteristics of Long-Span Highway-Rail Double-Tower Cable-Stayed Bridge

Study on Dynamic Characteristics of Long-Span Highway-Rail Double-Tower Cable-Stayed Bridge

Seismic Fragility Assessment of RC Columns Exposed to the Freeze-Thaw Damage

Modal Analysis of a Steel Truss Girder Cable-Stayed Bridge with Single Tower and Single Cable Plane

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