Multiflood and Multilayer Method for Scour Rate Prediction at Bridge Piers

Briaud, Jean‐Louis; Chen, H. C.; Kwak, Kiseok; Han, Seung Woon; Ting, Francis C. K.

doi:10.1061/(asce)1090-0241(2001)127:2(114)

Cited by 45 publications

(32 citation statements)

References 2 publications

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“…That is, such formulas do not reflect the effect of silt‐sized particles, which typically retards the scour process (Briaud et al . ; Briaud et al ; Ansari et al . ; Brandimarte et al .…”

Section: Predictions Using Existing Formulasmentioning

confidence: 98%

Prediction of time‐dependent local scour around bridge piers

Choi

2016

Water & Environment J

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Most formulas for predicting the scour depth around bridge piers result in over-predictions. This is partly due to ignoring the fact that the local scour is a time-dependent process. Formulas that take into account time-dependent local scour around bridge piers have been developed in the past. However, these formulas predict the scour process well, but only when applied to datasets from which they were constructed. Motivated by this, the present study proposes a relationship for time-dependent local scour using dimensional analysis and nonlinear regression. Similarly, another relationship for the time to equilibrium is also developed. The findings indicate that the proposed relationship predicts time-dependent local scour better than existing formulas. The proposed relationships are applicable to local scour around cylindrical bridge piers. It is assumed that the bed sediment is uniform and the bedform effect is minor and can be ignored.

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“…That is, such formulas do not reflect the effect of silt‐sized particles, which typically retards the scour process (Briaud et al . ; Briaud et al ; Ansari et al . ; Brandimarte et al .…”

Section: Predictions Using Existing Formulasmentioning

confidence: 98%

Prediction of time‐dependent local scour around bridge piers

Choi

2016

Water & Environment J

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“…Soil erosion, which in the bank toe is caused by river water flow, was determined in an open pipe in the laboratory. This test was based on the erosion function apparatus invented by Briaud et al (1999Briaud et al ( , 2001aBriaud et al ( , 2001bBriaud et al ( , 2004Briaud et al ( , 2008 [43,[53][54][55][56]. The equipment includes an open rectangular pipe 2 m long, 0.2 m wide, and 0.1 m high ( Figure 2).…”

Section: Determining Soil Erosion Rate In Laboratorymentioning

confidence: 99%

“…From an overview of the previous research focused on soil erosion and riverbank failure by water flow stress, it may appear that soil properties are important factors impacting on soil erosion and riverbank failure [19,20,[23][24][25]30,[43][44][45][46][47][48][49][50][51][52][53][54][55][56]. However, few studies have focused on the effects of soil properties and erosion on riverbank cantilever failure.…”

Section: Introductionmentioning

confidence: 99%

Riverbank Stability Assessment under River Water Level Changes and Hydraulic Erosion

Thi

Minh

2019

Water

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The dominant mechanism of riverbank cantilever failure is soil erosion of the bank toe and near bank zone. This paper demonstrates that the shape of the riverbank cantilever failure depends on the properties of the soil and the fluctuation of the river water level (RWL). With a stable RWL, a riverbank with higher resistance force leads to failure with larger and deeper overhang erosion width. When RWL rises, a less cohesive soil bank will be eroded over a larger width and riverbank failure will occur earlier. With a low rate of rising RWL, riverbank failure may happen in a type of mass failure. With a high rate of rising RWL, a riverbank will fail in a type of overhang riverbank failure, with the soil erosion rate being the main affected factor.

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“…Because this formula is based on experimental data about sand, it is not valid or applicable to different soil conditions. Recently, the scour rate over time and time effects are considered for clay soils [1], and a new approach using erosion index is applied to rock sites [2].…”

Section: Introductionmentioning

confidence: 99%

Bridge-Pier Safety Evaluation Method Using Nondestructive Impact Tests

Yoo¹,

Lee²,

Kım³

et al. 2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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This study aims to establish an evaluation method for bridge pier safety. To achieve this aim, a full-scale bridge pier was constructed, and a series of nondestructive tests were conducted using impact loads. The overburden loaded in the full-scale bridge pier was increased from 0 tonf up to 25 tonf by increments of 2.5 tonf. Impacts were applied to the upper and lower parts of the bridge pier in longitudinal, transverse, and lateral directions to analyze the behaviors of the bridge pier. Accelerometers were used to measure acceleration responses to impacts. Test results were converted to natural vibration frequencies according to impact direction and overburden using a fast Fourier transform algorithm. In addition, phase differences were utilized to analyze the behaviors of the bridge pier from the 1 st to 4 th modes. The effect of scouring was numerically analyzed. Ultimately, the safety of the bridge pier could be reasonably evaluated through the 2 nd and 3 rd modes.

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Multiflood and Multilayer Method for Scour Rate Prediction at Bridge Piers

Cited by 45 publications

References 2 publications

Prediction of time‐dependent local scour around bridge piers

Prediction of time‐dependent local scour around bridge piers

Riverbank Stability Assessment under River Water Level Changes and Hydraulic Erosion

Bridge-Pier Safety Evaluation Method Using Nondestructive Impact Tests

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