Development length tests of full-scale prestressed Self-consolidating concrete box and i-girders

AbstractSelf-consolidating concrete (SCC) is a highly workable concrete with tremendous potential to reduce the production time and cost of precast members. Institutions in Japan, Europe, and the United States have successfully utilized SCC in large-scale applications, particularly in bridges. However, lack of experimental data has hindered SCC’s implementation in prestressed design. This paper reports the findings of a study investigating the development length of steel strands in SCC full-scale prestressed bridge girders. Flexural tests are conducted on two 8.5-m-long box girders and two 14.6-m-long I-girders cast with SCC to determine the development length of their 12.7-mm-diameter prestressing steel strands. Experimental results are compared with requirements of the American Concrete Institute and AASHTO. Results are also compared with analytical expressions for development length proposed in the literature.

[1]  Justin David Trent.  Transfer Length, Development Length, Flexural Strength, and Prestress Loss Evaluation in Pretensioned Self-Consolidating Concrete Members , 2007 .

[2]  R. Burgueño,et al.  Effect of SCC Mixture Proportioning on Transfer and Development Length of Prestressing Strand , 2007, SP-247: Self-Consolidating Concrete for Precast Prestressed Applications.

[3]  Bassem O Andrawes,et al.  Transfer Length in Prestressed Self-Consolidating Concrete Box and I-Girders , 2011 .

[4]  Myint M Lwin,et al.  APPLICATIONS OF SELF-COMPACTING CONCRETE IN JAPAN, EUROPE AND THE UNITED STATES , 2003 .

[5]  P Zia,et al.  DEVELOPMENT LENGTH OF PRESTRESSING STRANDS , 1977 .

[6]  C D Buckner,et al.  A REVIEW OF STRAND DEVELOPMENT LENGTH FOR PRETENSIONED CONCRETE MEMBERS , 1995 .

[7]  Kyle Hatch Larson.  Evaluating the Time Dependent Deformations and Bond Characteristics of a Self Consolidating Concrete Mix and the Implication for Pretensioned Bridge Applications , 2007 .

[8]  Norman W. Hanson,et al.  Flexural Bond Tests of Pretensioned Prestressed Beams , 1959 .

[9]  C. A. Arbeláez,et al.  Analytical model for transfer length prediction of 13 mm prestressing strand , 2007 .

[10]  Basile G. Rabbat,et al.  Notes on ACI 318-08, building code requirements for structural concrete : with design applications , 2008 .

[11]  Bassem O Andrawes,et al.  Transfer and Development Length of Prestressing Tendons in Full-Scale AASHTO Prestressed Concrete Girders using Self-Consolidating Concrete , 2009 .

[12]  Edwin G. Burdette,et al.  DEVELOPMENT LENGTH AND LATERAL SPACING REQUIREMENTS OF PRESTRESSING STRAND FOR PRESTRESSED CONCRETE BRIDGE GIRDERS , 1994 .

[13]  Gregor P. Wollmann,et al.  Steel Girder Design per AASHTO LRFD Specifications (Part 1) , 2004 .

[14]  Mohsen A. Shahawy.  A CRITICAL EVALUATION OF THE AASHTO PROVISIONS FOR STRAND DEVELOPMENT LENGTH OF PRESTRESSED CONCRETE MEMBERS , 2001 .