Experimental Study on Scour at a Sharp-Nose Bridge Pier with Debris Blockage
2018
Аутори
Ebrahimi, MohsenKripakaran, Prakash
Prodanović, Dušan
Kahraman, Recep
Riella, Matthew
Tabor, Gavin
Arthur, Scott
Đorđević, Slobodan
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Previous experimental research on the effects of debris on pier scour has focused primarily on circular and rectangular piers with debris present just under flow free surface. Debris-induced scour around sharp-nose piers, which are typical of masonry bridge piers, and the effect of debris elevation on pier scour have seldom been studied before. This paper aims to fill this knowledge gap. It presents results from flume experiments investigating scour around a sharp-nose pier under shallow flow conditions with angle of attack relative to the pier being zero. Uniform sand is used as bed material. Debris is modeled as stationary and extending only upstream of the pier. Three simplified debris geometries (cylinder, half-pyramid, and plate) are studied. Results show that scour depth decreases as debris gets closer to the bed with maximum scour depth occurring when debris is located just under the flow free surface. Interestingly, scour depths produced by debris in shallow flow are observed t...o be comparable to those produced by deep flow in the absence of debris. This finding highlights the importance of monitoring debris accumulation at bridges in nonflood conditions. Results also show that the volume of the scour hole around a pier increases quadratically with maximum scour depth. This information is useful for postflood scour remedial works. Lastly, the collected laboratory measurements are used to compare four popular equations for scour estimation on their ability to predict debris-induced scour. The Colorado State University (CSU) equation is found to offer the most accurate predictions.
Кључне речи:
Masonry bridge pier / Debris blockage / Scour / Laboratory experimentsИзвор:
Journal of Hydraulic Engineering, 2018, 144, 12Издавач:
- American Society of Civil Engineers (ASCE)
Финансирање / пројекти:
- United Kingdom's Engineering and Physical Sciences Research Council (EPSRC) EP/M017354/1
DOI: 10.1061/(ASCE)HY.1943-7900.0001516
ISSN: 0733-9429
WoS: 000447254300003
Scopus: 2-s2.0-85053920363
Колекције
Институција/група
GraFarTY - JOUR AU - Ebrahimi, Mohsen AU - Kripakaran, Prakash AU - Prodanović, Dušan AU - Kahraman, Recep AU - Riella, Matthew AU - Tabor, Gavin AU - Arthur, Scott AU - Đorđević, Slobodan PY - 2018 UR - https://grafar.grf.bg.ac.rs/handle/123456789/985 AB - Previous experimental research on the effects of debris on pier scour has focused primarily on circular and rectangular piers with debris present just under flow free surface. Debris-induced scour around sharp-nose piers, which are typical of masonry bridge piers, and the effect of debris elevation on pier scour have seldom been studied before. This paper aims to fill this knowledge gap. It presents results from flume experiments investigating scour around a sharp-nose pier under shallow flow conditions with angle of attack relative to the pier being zero. Uniform sand is used as bed material. Debris is modeled as stationary and extending only upstream of the pier. Three simplified debris geometries (cylinder, half-pyramid, and plate) are studied. Results show that scour depth decreases as debris gets closer to the bed with maximum scour depth occurring when debris is located just under the flow free surface. Interestingly, scour depths produced by debris in shallow flow are observed to be comparable to those produced by deep flow in the absence of debris. This finding highlights the importance of monitoring debris accumulation at bridges in nonflood conditions. Results also show that the volume of the scour hole around a pier increases quadratically with maximum scour depth. This information is useful for postflood scour remedial works. Lastly, the collected laboratory measurements are used to compare four popular equations for scour estimation on their ability to predict debris-induced scour. The Colorado State University (CSU) equation is found to offer the most accurate predictions. PB - American Society of Civil Engineers (ASCE) T2 - Journal of Hydraulic Engineering T1 - Experimental Study on Scour at a Sharp-Nose Bridge Pier with Debris Blockage IS - 12 VL - 144 DO - 10.1061/(ASCE)HY.1943-7900.0001516 ER -
@article{ author = "Ebrahimi, Mohsen and Kripakaran, Prakash and Prodanović, Dušan and Kahraman, Recep and Riella, Matthew and Tabor, Gavin and Arthur, Scott and Đorđević, Slobodan", year = "2018", abstract = "Previous experimental research on the effects of debris on pier scour has focused primarily on circular and rectangular piers with debris present just under flow free surface. Debris-induced scour around sharp-nose piers, which are typical of masonry bridge piers, and the effect of debris elevation on pier scour have seldom been studied before. This paper aims to fill this knowledge gap. It presents results from flume experiments investigating scour around a sharp-nose pier under shallow flow conditions with angle of attack relative to the pier being zero. Uniform sand is used as bed material. Debris is modeled as stationary and extending only upstream of the pier. Three simplified debris geometries (cylinder, half-pyramid, and plate) are studied. Results show that scour depth decreases as debris gets closer to the bed with maximum scour depth occurring when debris is located just under the flow free surface. Interestingly, scour depths produced by debris in shallow flow are observed to be comparable to those produced by deep flow in the absence of debris. This finding highlights the importance of monitoring debris accumulation at bridges in nonflood conditions. Results also show that the volume of the scour hole around a pier increases quadratically with maximum scour depth. This information is useful for postflood scour remedial works. Lastly, the collected laboratory measurements are used to compare four popular equations for scour estimation on their ability to predict debris-induced scour. The Colorado State University (CSU) equation is found to offer the most accurate predictions.", publisher = "American Society of Civil Engineers (ASCE)", journal = "Journal of Hydraulic Engineering", title = "Experimental Study on Scour at a Sharp-Nose Bridge Pier with Debris Blockage", number = "12", volume = "144", doi = "10.1061/(ASCE)HY.1943-7900.0001516" }
Ebrahimi, M., Kripakaran, P., Prodanović, D., Kahraman, R., Riella, M., Tabor, G., Arthur, S.,& Đorđević, S.. (2018). Experimental Study on Scour at a Sharp-Nose Bridge Pier with Debris Blockage. in Journal of Hydraulic Engineering American Society of Civil Engineers (ASCE)., 144(12). https://doi.org/10.1061/(ASCE)HY.1943-7900.0001516
Ebrahimi M, Kripakaran P, Prodanović D, Kahraman R, Riella M, Tabor G, Arthur S, Đorđević S. Experimental Study on Scour at a Sharp-Nose Bridge Pier with Debris Blockage. in Journal of Hydraulic Engineering. 2018;144(12). doi:10.1061/(ASCE)HY.1943-7900.0001516 .
Ebrahimi, Mohsen, Kripakaran, Prakash, Prodanović, Dušan, Kahraman, Recep, Riella, Matthew, Tabor, Gavin, Arthur, Scott, Đorđević, Slobodan, "Experimental Study on Scour at a Sharp-Nose Bridge Pier with Debris Blockage" in Journal of Hydraulic Engineering, 144, no. 12 (2018), https://doi.org/10.1061/(ASCE)HY.1943-7900.0001516 . .