Dynamic response of long-span continuous curved box girder bridge under seismic excitation

Cai, H.; Lu, Hailin

doi:10.21595/jve.2019.20345

Cited by 5 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a vertical plane, the deadweight of each location equals the mass of the overlying unit area. To compute the frequency and mode shapes, the subspace iteration method [24][25][26][27] is utilized. Table 2 shows the characteristics of the natural frequency, the period, and the mode shapes of the first 10 modes of the bridge, while Figure 3 illustrates some of the mode shapes.…”

Section: Analysis Of Dynamic Characteristicsmentioning

confidence: 99%

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

Guo,

Jiang,

Zhang

et al. 2024

Buildings

View full text Add to dashboard Cite

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.

show abstract

Section: Analysis Of Dynamic Characteristicsmentioning

confidence: 99%

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

Guo,

Jiang,

Zhang

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

“…In the calculation process of dynamic characteristics, the undamped free vibration equation is adopted and the initial stress effect of the deadweight is taken into consideration; the deadweight stress in the vertical direction of any point in the bridge structure is equal to the mass of the structure per unit area above this point, that is, the deadweight is converted into equivalent load. The subspace iteration method is used to extract the natural vibration frequencies and vibration modes [31][32][33][34]. The first ten natural vibration frequencies and vibration mode characteristics of the bridge at the maximum cantilever state and completion stage are shown in Table 2, some vibration modes are shown in Figure 6.…”

Section: Dynamic Characteristic Analysis Of the Special Cable-stayed ...mentioning

confidence: 99%

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

et al. 2022

View full text Add to dashboard Cite

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.

show abstract

“…There have also been some changes in the cross-section configuration of box girders, such as the number of box chambers and the form of composite box sections. The traditional single-box single-cell section structure [1]- [3] is lightweight and has strong applicability, but the single-box twin-cell box girder bridge gradually appears in the public's view with the rapid increase of traffic flow [4]- [5]. The stress characteristics of the box girder are completely different from those of the single-box single-cell box girder.…”

Section: Introductionmentioning

confidence: 99%

A one-dimensional high-order dynamic model for twin-cell box girders with deformable cross-section

Zhu,

Zhang,

Zeng

2024

J. vibroeng.

View full text Add to dashboard Cite

A one-dimensional high-order dynamic model for single-box twin-cell box girders is presented together with the pattern recognition algorithm. The model takes into account the deformable cross-section and can accurately predict its 3D dynamic behaviors. The cross-section deformation is captured by basis functions satisfying displacement continuity condition, which is essential to construct the initial model formulation based on the Hamilton principle. The axial variation patterns of generalized coordinates are decoupled by solving the eigenvalue problem. On this basis, the combinations of basis functions are obtained to bring out cross-section deformation. The cross-section deformation, hierarchically organized and physically meaningful, are used to update the basis functions in the reconstructed high-order model. Numerical analysis has verified the accuracy and applicability of the reconstructed one-dimensional high-order model.

show abstract

Dynamic response of long-span continuous curved box girder bridge under seismic excitation

Cited by 5 publications

References 14 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

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

A one-dimensional high-order dynamic model for twin-cell box girders with deformable cross-section

Contact Info

Product

Resources

About