EXTENT OF RIPRAP LAYER WITH DIFFERENT STONE SIZES AROUND RECTANGULAR BRIDGE PIERS WITH OR WITHOUT AN ATTACHED COLLAR

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KARIMAEE TABARESTANI M.; ZARRATI A.R.; MASHAHIR M.B.; MOKALLAF E.

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Paper Information

Journal: Scientia Iranica Year:2015 | Volume:22 | Issue:3 (TRANSACTIONS A: CIVIL ENGINEERING) Page(s): 709-716

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Information Journal Paper

Title

EXTENT OF RIPRAP LAYER WITH DIFFERENT STONE SIZES AROUND RECTANGULAR BRIDGE PIERS WITH OR WITHOUT AN ATTACHED COLLAR

Author(s)

KARIMAEE TABARESTANI M. | ZARRATI A.R. | MASHAHIR M.B. | MOKALLAF E. | Issue Writer Certificate

Keywords

LOCAL SCOUR

RECTANGULAR BRIDGE PIER

CRITICAL REGION

RIPRAP EXTENT

COLLAR

RIPRAP SIZING

Abstract

In the present study, the extent of riprap layer with different sizes around bridge piers is investigated. Rectangular pier with or without an attached protective COLLAR aligned with the flow and skewed at different angles are tested. The optimal configurations of RIPRAP EXTENT for each pier condition with different sizes are determined. Experiments showed that in case of aligned rectangular pier without a COLLAR only 8% of the area around the pier is critical and the remaining 92% area can be protected with about 60% smaller riprap stones. As the skew angle of the pier increases up to 20, the critical area increases up to 23% of the RIPRAP EXTENT. In case of protected pier with COLLAR, the COLLAR prevents the CRITICAL REGION around the pier in aligned and 5o skewed pier. However, by increasing the flow attack angle up to 20, only a small area up to 30% in the RIPRAP EXTENT around the COLLAR is critical and the remaining area can be placed with 40% smaller riprap size. Finally, the design algorithm for RIPRAP EXTENT with different sizes is presented.

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APA: Copy

KARIMAEE TABARESTANI, M., ZARRATI, A.R., MASHAHIR, M.B., & MOKALLAF, E.. (2015). EXTENT OF RIPRAP LAYER WITH DIFFERENT STONE SIZES AROUND RECTANGULAR BRIDGE PIERS WITH OR WITHOUT AN ATTACHED COLLAR. SCIENTIA IRANICA, 22(3 (TRANSACTIONS A: CIVIL ENGINEERING)), 709-716. SID. https://sid.ir/paper/290297/en

Vancouver: Copy

KARIMAEE TABARESTANI M., ZARRATI A.R., MASHAHIR M.B., MOKALLAF E.. EXTENT OF RIPRAP LAYER WITH DIFFERENT STONE SIZES AROUND RECTANGULAR BRIDGE PIERS WITH OR WITHOUT AN ATTACHED COLLAR. SCIENTIA IRANICA[Internet]. 2015;22(3 (TRANSACTIONS A: CIVIL ENGINEERING)):709-716. Available from: https://sid.ir/paper/290297/en

IEEE: Copy

M. KARIMAEE TABARESTANI, A.R. ZARRATI, M.B. MASHAHIR, and E. MOKALLAF, “EXTENT OF RIPRAP LAYER WITH DIFFERENT STONE SIZES AROUND RECTANGULAR BRIDGE PIERS WITH OR WITHOUT AN ATTACHED COLLAR,” SCIENTIA IRANICA, vol. 22, no. 3 (TRANSACTIONS A: CIVIL ENGINEERING), pp. 709–716, 2015, [Online]. Available: https://sid.ir/paper/290297/en

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