Effects of ground motion directionality on seismic behavior of skewed bridges considering SSI

Noori, Hamidreza; Memarpour, Mohammad Mahdi; Yakhchalian, Mansoor; Soltanieh, S.

doi:10.1016/j.soildyn.2019.105820

Cited by 24 publications

(11 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The same results with [5] were shown in [14] considering a skewed bridge. In [15], the effect of irregular configuration and the stiffness of the substructure on the vulnerability of the bridge was shown.…”

Section: Introductionsupporting

confidence: 78%

Seismic Fragility of a Single Pillar-Column Under Near and Far Fault Soil Motion with Consideration of Soil-Pile Interaction

Lemsara

Bouzid

Mamen

et al. 2023

Eng. Technol. Appl. Sci. Res.

View full text Add to dashboard Cite

The soil-structure interaction is a significant challenge faced by civil engineers due to the complexity potential in terms of seismic fragility evaluation. This paper presents a seismic fragility estimation of a single pier considering seismic ground motion types. Furthermore, sand type, pile diameter, pier height, and mass variation were considered to estimate their effect on the seismic fragility of the concrete pier. Incremental dynamic analysis was performed using a beam on a nonlinear Winkler foundation model. The analysis model condition compared near- and far-ground motion effects. Dynamic analysis and fragility assessment of the single-pier structure showed that low mass center produced less vulnerability of the concrete pier in the two cases of the sand type under near- and far-ground motions. The near and far earthquake simulations at complete failure probability had a difference of less than 5% when 0.65s<T1<1s and 2.4<T1/T2, but the opposite was shown when T1<0.5s and 3<T1/T2 were present together.

show abstract

Section: Introductionsupporting

confidence: 78%

Seismic Fragility of a Single Pillar-Column Under Near and Far Fault Soil Motion with Consideration of Soil-Pile Interaction

Lemsara

Bouzid

Mamen

et al. 2023

Eng. Technol. Appl. Sci. Res.

View full text Add to dashboard Cite

show abstract

“…Thus, researchers have used a variety of comparative analytic techniques to examine the impact of these parameters on the seismic response. The finite element numerical analysis is the common method to establish a probabilistic seismic demand model and a vulnerability curve for the skew bridge [18,19]. S.W.…”

Section: Introductionmentioning

confidence: 99%

Determination of reasonable parameters for skew bridge under different skew angles

Yin¹,

Wang²,

Guo³

2023

J. vibroeng.

View full text Add to dashboard Cite

A finite element model is created using OpenSees software to perform a time history analysis in order to analyze the seismic response law of a skew bridge and the damage volume of its key components, using a typical 3×20 m skew continuous girder bridge as an example. The seismic response of the skew continuous girder bridge under various factors such as the size of the abutment expansion joint, shear key gap, and shear key strength is studied then the damage rate is assessed for the bearing, shear key, and pier. The research results show that under the action of earthquake ground motion with 0.3 g PGA, the seismic force transmitted to the pier is small, and the pier is elastic owing to the sliding of the bearing, but the damage degree of the shear key is larger than that of the bearing and pier. The impact increases the rotation effect of the main beam in the direction of off acute angle, resulting in a greater damage to the shear key at the acute angle than that at the obtuse angle. The damage of bearing and shear key increases and then decreases with the increasing of expansion joint, and the larger the skew angle is, the smaller the expansion joint will be corresponding to the maximum displacement of bearing and shear key. With the increase of the shear key gap, the deformation limitation effect of the shear key on the main beam decreases significantly, resulting in a linear increase in the bearing slip, which increases the risk of the main beam subsidence. With the increase of the shear key strength, the bearing and shear key damage decreases greatly at first, and then increases slightly. However, the pier damage increases obviously. In an area with a high risk of earthquake, it is recommended that the shear key can be a “fuse element”. For any oblique angle, the shear key gap can be reduced to 2 cm, and the shear key strength can be increased to 125 % or 150 %. When the skew angle is between 30 and 60, the expansion joint size can be increased to 12 cm or 16 cm.

show abstract

“…Also, the results revealed that the SSI effects induce the responses. Even so, the effects of spatially varying ground motions were not considered [13]. In another study accomplished by , the effects of directionality of seismic waves on the responses of irregular bridges were explored.…”

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

View full text Add to dashboard Cite

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.

show abstract

Effects of ground motion directionality on seismic behavior of skewed bridges considering SSI

Cited by 24 publications

References 30 publications

Seismic Fragility of a Single Pillar-Column Under Near and Far Fault Soil Motion with Consideration of Soil-Pile Interaction

Seismic Fragility of a Single Pillar-Column Under Near and Far Fault Soil Motion with Consideration of Soil-Pile Interaction

Determination of reasonable parameters for skew bridge under different skew angles

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

Contact Info

Product

Resources

About