TY - JOUR
T1 - Shear failure analysis on ultra-high performance concrete beams reinforced with high strength steel
AU - Xia, Jun
AU - Mackie, Kevin R.
AU - Saleem, Muhammad A.
AU - Mirmiran, Amir
N1 - Funding Information:
This study was sponsored by Florida Departmenrt of Transportation (FDOT) under the contract No. BD015 RPWO # 22 with Mr. Marcus Ansley as the project manager . The authors are pleased to acknowledge the support of Mr. Charles Ishee at the FDOT Structural Materials Laboratory for testing the UHPC cylinders. Lafarge North American and MMFX Technologies Corporation are acknowledged for providing the materials tested in this research. The authors acknowledge Dr. Lei Zhao for his contribution on initiating this research project. The views and findings reported here, however, are those of the writers alone, and not necessarily the views of the sponsoring agency.
PY - 2011/12
Y1 - 2011/12
N2 - A new deck system for moveable bridges was developed that makes use of ultra-high performance concrete (UHPC) reinforced with high strength steel (HSS) rebar to achieve the light weight and high strength requirements in moveable bridge applications. However, the typical deck strips of this deck system failed predominantly due to shear cracks in simply supported beam proof tests. This paper investigates the mechanism of the deck strip shear failure experimentally and analytically. Experimental studies were performed at several scales, including material characterization, bond strength tests, small-scale prism tests, and full-scale beam tests. Specimens with traditional shear strengthening techniques were also tested. Several existing formulas were utilized to predict the shear strength, and the results were compared to the experimental results. The accuracy and limitations of these formulas are discussed. The shear failure of UHPC-HSS beams is not characterized by brittle response or catastrophic load reduction as with normal reinforced concrete. Therefore, this particular shear failure mode is regarded as acceptable. However, the additional shear resistance caused by the localized deformation of the longitudinal reinforcement is not recommended to be considered for design capacity formulas.
AB - A new deck system for moveable bridges was developed that makes use of ultra-high performance concrete (UHPC) reinforced with high strength steel (HSS) rebar to achieve the light weight and high strength requirements in moveable bridge applications. However, the typical deck strips of this deck system failed predominantly due to shear cracks in simply supported beam proof tests. This paper investigates the mechanism of the deck strip shear failure experimentally and analytically. Experimental studies were performed at several scales, including material characterization, bond strength tests, small-scale prism tests, and full-scale beam tests. Specimens with traditional shear strengthening techniques were also tested. Several existing formulas were utilized to predict the shear strength, and the results were compared to the experimental results. The accuracy and limitations of these formulas are discussed. The shear failure of UHPC-HSS beams is not characterized by brittle response or catastrophic load reduction as with normal reinforced concrete. Therefore, this particular shear failure mode is regarded as acceptable. However, the additional shear resistance caused by the localized deformation of the longitudinal reinforcement is not recommended to be considered for design capacity formulas.
KW - Bond strength
KW - Dowel action
KW - Moment-shear interaction
KW - Passive reinforcement
KW - Shear reinforcement
UR - http://www.scopus.com/inward/record.url?scp=80054878225&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2011.06.023
DO - 10.1016/j.engstruct.2011.06.023
M3 - Article
AN - SCOPUS:80054878225
SN - 0141-0296
VL - 33
SP - 3597
EP - 3609
JO - Engineering Structures
JF - Engineering Structures
IS - 12
ER -