Effect of incidence angle on the seismic performance of skewed bridges retrofitted with buckling-restrained braces

Wang, Yuandong; Ibarra, Luis; Pantelides, Chris P.

doi:10.1016/j.engstruct.2020.110411

Cited by 18 publications

(6 citation statements)

References 32 publications

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“…The transverse connecting system of the main arch is a vulnerable component; because of the high level of stiffness of the lateral connection system, there a large internal force response and buckling instability occur under earthquake conditions [28,29]. Of the existing seismic performance-improvement technologies, buckling-restrained brace (BRB) may be the only type that can effectively address the buckling instability of the transverse connection system of the main arch [30][31][32][33][34][35][36][37]. However, compared with buildings, the super-long-span CFST arch bridge has the characteristics of large internal force and small displacement.…”

Section: Introductionmentioning

confidence: 99%

Improvement in the Seismic Performance of a Super-Long-Span Concrete-Filled Steel-Tube-Arch Bridge

Tong

Gan

et al. 2023

Buildings

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The applicability of current seismic-performance-improvement technologies needs to be studied. This research took a super-long-span CFST arch bridge with a total length of 788 m as the object on which to perform a non-linear time-history analysis and a seismic-check calculation according to the seismic response, so as to reveal the seismic weak points of the arch bridge. After the completion of the bridge’s construction, we arranged and utilized the stayed buckle cables (SBCs) reasonably. The seismic performance of the super-long-span CFST arch bridge was improved through friction-pendulum bearings (FPBs) and SBCs. The research shows that FPBs can solve the problem of the insufficient shear resistance of bearings, and SBCs can address the problem whereby the compressive stress of the transverse connection of the main arch exceeds the allowable stress. Moreover, SBCs can increase the transverse stiffness of arch bridges and reduce their seismic responses. Finally, a combination of FPBs and SBCs was adopted to improve the overall seismic performance of the arch bridge and obtain the best seismic-performance-improvement effect.

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Section: Introductionmentioning

confidence: 99%

Improvement in the Seismic Performance of a Super-Long-Span Concrete-Filled Steel-Tube-Arch Bridge

Tong

Gan

et al. 2023

Buildings

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“…However, earthquake motions exist not only 2-direction but also in 3-direction directions when determining earthquake behaviour in various engineering structures in many papers [16,17]. A range of construction types are evaluated asymmetric-plan structures [18], a high-rise steel building [19], RCC (Reinforced Cement Concrete) frames [20], a highway tunnel [21], tuned liquid column dampers [22], RC bridge [23], skewed bridges retrofitted with buckling-restrained braces [24], masonry building [25], RC building [26], hybrid reinforced concrete-steel building [27], and these are analysed and designed with regard to different seismic excitation angles. When the results of these studies were examined, it was observed that the maximum earthquake forces acting on a structure can occur at different angles.…”

Section: Introductionmentioning

confidence: 99%

Influence of earthquake angle on seismic performance of concrete highway bridges

Lakusic

2023

JCE

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This study aims to evaluate the effect of earthquake angle on the seismic performance of a concrete highway bridge. As a numerical example, a twin prestressed concrete box-girder highway bridge was analysed using finite element methods. The bridge was subjected to the 1992 Erzincan earthquake ground accelerations in 19 directions with values ranging from 0° to 90° in 5-degree increments. To evaluate the effects of different earthquake angles on seismic performance, variations in the maximum displacements, internal forces and principal stresses on the bridge deck, columns, isolator and foundation were studied . The results changed considerably for different earthquake angles. Variations in the displacement, internal forces and principal stresses occurred at different incidence angles. In other words, there is no unique angle of incidence for each structure.

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“…Meanwhile, the study did not considere the effect of the non-uniform excitations [14]. Wang et al (2020) investigated the effects of directionality of seismic waves on the fragility of a skewed reinforced concrete bridge. They found that the responses of the bridge are not sensitive to the directionality of the input wave, and the maximum responses can be evaluated by the responses in longitudianl and transverse directions [15].…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al (2020) investigated the effects of directionality of seismic waves on the fragility of a skewed reinforced concrete bridge. They found that the responses of the bridge are not sensitive to the directionality of the input wave, and the maximum responses can be evaluated by the responses in longitudianl and transverse directions [15]. Feng et al (2020) developed a method to evaluate the maximum response of a curved bridge for the different seismic incidents.…”

Section: Introductionmentioning

confidence: 99%

Effect of the angle of seismic incidence on the response of a long-span curved bridge under spatially varying ground motions

Hosseinnezhad

Gholizad

2022

NMCE

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The incidence angle of seismic waves affects the maximum response of bridges. Furthermore, long-span structures experience different seismic excitations at supports because of the spatial variability of ground motions. Moreover, for curved bridges, because of the irregular shape and the interaction between bending and torsion, the maximum response of the structure would be correlated to the input angle of the earthquake. In this study, the dynamic response of a longspan reinforced concrete curved bridge under asynchronous input motions for different inclinations of seismic incidence was investigated. For the numerical study, a curved plan bridge from the Caltrans bridges portfolio is selected and analyzed for various load and soil scenarios. The correlated arrays are generated by the method described in the paper and implemented to investigate the bridge. From the outcomes, the directionality effect of ground motions is evident that the responses change corresponding to the input angle of the seismic wave. For the case of multiple support excitations, the maximum response is different from the uniform load pattern. Finally, to find the most unfavorable input angles, an incremental dynamic analysis was performed. The results showed that the maximum response for each column occurs for different angles of earthquake incidence. The results showed that the responses of the structure increased under some angles of incidence. Additionally, responses from multiple-support were more varied in comparison with uniform excitations under different input angles, and in some cases larger than the responses caused by uniform excitations.

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Effect of incidence angle on the seismic performance of skewed bridges retrofitted with buckling-restrained braces

Cited by 18 publications

References 32 publications

Improvement in the Seismic Performance of a Super-Long-Span Concrete-Filled Steel-Tube-Arch Bridge

Improvement in the Seismic Performance of a Super-Long-Span Concrete-Filled Steel-Tube-Arch Bridge

Influence of earthquake angle on seismic performance of concrete highway bridges

Effect of the angle of seismic incidence on the response of a long-span curved bridge under spatially varying ground motions

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