Shaking table tests and numerical simulations of a small radius curved bridge considering SSI effect

Zhi, Zhang; Li, Xiaojun; Riqing, Lan; Song, Chenning

doi:10.1016/j.soildyn.2018.12.006

Cited by 13 publications

(3 citation statements)

References 30 publications

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“…A small radius curved bridge with a radius of 40 m in Beijing was taken as a prototype structure, and this bridge was reported in detail in reference [20]. The similarity relationship of the model structure was deduced from the Buckingham π theorem [21].…”

Section: Similarity Ratiomentioning

confidence: 99%

Influence of the Duration Compression Ratio of the Input Motion on the Seismic Response of a Soil–Pile–Bridge Structure System in Shaking Table Tests

Zhi

Song

et al. 2022

Applied Sciences

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In the shaking table test of a soil–pile–bridge structure system, it is difficult to keep the similarity relations of the model structure and that of the model soil consistent. Due to the difference of geometry and material similarity ratios for the model structure and model soil, the determination of the duration compression ratio of input motions is a key problem. The spectrum characteristics of input motions will be varied by the duration compression ratio so that the seismic responses of structure and soil system will be affected. There are three commonly used approaches to determine the duration compression ratio of input motions in shaking table tests: the time similarity ratio of model structure; the time similarity ratio of model soil; and uncompressed. To study the influence of the duration compression ratio on the seismic response of a soil–structure system in shaking table tests, the El Centro record and the Wolong record were chosen as the input motions, and the durations were compressed by the three commonly used approaches in this paper. The influence of the duration compression ratios of the input motions on the acceleration response of a soil–pile–bridge structure system was compared and analyzed through a series of shaking table tests. The results showed that the duration compression ratio affected the acceleration response of the model soil and the model structure, and the effect was more obvious when the peak ground acceleration (PGA) was small. If the research is focused on the seismic response of the soil, it is recommended to use the time similarity ratio of the model soil to compress the input motions. If the research is focused on the seismic response of the structure, it is recommended to use the time similarity ratio of the model structure to compress the input motions. This study could provide a reference for the design of the shaking table test of a soil–pile–bridge structure system.

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Section: Similarity Ratiomentioning

confidence: 99%

Influence of the Duration Compression Ratio of the Input Motion on the Seismic Response of a Soil–Pile–Bridge Structure System in Shaking Table Tests

Zhi

Song

et al. 2022

Applied Sciences

Self Cite

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“…Results showed that the curvature radius increases the sensitivity of the bridge to the ground motion spatial variations, a result that can be mainly attributed to the excitation of higher modes [56,57]. Zhang et al [58] compared experimental and numerical results of seismic damage for a small radius curved bridge considering the soil-structure interaction (SSI) and reported that applying the equivalent soil springs method to simulate SSI in the numerical model can gain approximate results to the actual ones. The aforementioned experimental studies reveal that seismic performance of curved bridges is particularly complex and highlight the effects of geometric parameters, seismic propagation process, and soil condition.…”

Section: Introductionmentioning

confidence: 99%

Theory and experimental verification of a resultant response-based method for assessing the critical seismic excitation direction of curved bridges

Feng

Deng

Lao

et al. 2020

Engineering Structures

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Previous studies have shown that the seismic incidence angle imposes a non-negligible impact on the seismic performance of curved bridges. The computational efficiency of some current methods for determining the critical angle needs to be improved and their applicability in practical engineering projects remains to be examined. For this reason, a resultant response-based (RRB) method is developed herein for assessing the critical excitation direction of curved bridges. To validate the feasibility of this method in an actual seismic design context, a 1/62.5-scale model of a three-span curved bridge is designed and a multi-angle shaking table test is implemented. Meanwhile, the finiteelement model of the test specimen is set up, and the RRB method as well as the linear responsehistory analysis (LRHA) are comparatively assessed. The results indicate that the RRB method can

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“…A feasible approach is to combine the two. Many results of numerical studies on seismic hydrodynamic pressure on bridge pier have been published in the past two decades, while just few tests were carried out, especially on distribution of the pressure with submerged depth [8][9][10][11][12]. To study the variation of the pressure with submerged depth in deep water, a set of shaking table model tests were carried out recently [13,14].…”

Section: Introductionmentioning

confidence: 99%

A Set of Shaking Table Model Tests of Seismic Hydrodynamic Pressure on Bridge Pier with Submerged Depth

Tao

2020

CERJ

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A set of shaking table model tests of hydrodynamic pressures on bridge piers are presented in this paper. Five models made of Perspex and concrete with rectangular, elliptical and variable sections are built, and fixed in a steel tank on shaking table with 0.9 m to 1.6 m water, respectively. The seismic hydrodynamic pressures observed at 4/7/8 submerged depths from two level inputs of ground motions and two direction combinations show that the representative values per unit area increase with submerged depth obviously, the increasing rate is generally faster than those by the two classical assumptions at shallow depth, but slower at deep depth.

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Shaking table tests and numerical simulations of a small radius curved bridge considering SSI effect

Cited by 13 publications

References 30 publications

Influence of the Duration Compression Ratio of the Input Motion on the Seismic Response of a Soil–Pile–Bridge Structure System in Shaking Table Tests

Influence of the Duration Compression Ratio of the Input Motion on the Seismic Response of a Soil–Pile–Bridge Structure System in Shaking Table Tests

Theory and experimental verification of a resultant response-based method for assessing the critical seismic excitation direction of curved bridges

A Set of Shaking Table Model Tests of Seismic Hydrodynamic Pressure on Bridge Pier with Submerged Depth

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