ACI-408R-2003英文书.pdf

ACI 408R-03 Bond and Development of Straight Reinforcing Bars in Tension Reported by ACI Committee 408 David Darwin* Chair Adolfo B. Matamoros* Secretary John H. Allen Atorod Azizinamini Gyorgy L. Balazs JoAnn Browning*? James V. Cox Richard A. DeVries* Rolf Eligehausen Fernando E. Fagundo Anthony L. Felder? Robert J. Frosch? Bilal S. Hamad* Neil M. Hawkins Roberto T. Leon* LeRoy A. Lutz? Steven L. McCabe John F. McDermott Denis Mitchell Stavroula J. Pantazopoulou Max L. Porter Julio A. Ramirez John F. Silva Jun Zuo* *Members of the subcommittee who prepared this report. ?Members of the editorial subcommittee. The performance of reinforced concrete structures depends on adequate bond strength between concrete and reinforcing steel. This report describes bond and development of straight reinforcing bars under tensile load. Bond behavior and the factors affecting bond are discussed, including concrete cover and bar spacing, bar size, transverse reinforcement, bar geometry, concrete properties, steel stress and yield strength, bar surface condition, bar casting position, development and splice length, distance between spliced bars, and concrete consolidation. Descriptive equations and design provisions for development and splice strength are presented and compared using a large database of test results. The contents of the database are summarized, and a protocol for bond tests is presented. ACI Committee Reports, Guides, Standard Practices, and Commentaries are intended for guidance in planning, designing, executing, and inspecting construction. This document is intended for the use of individuals who are competent to evaluate the significance and limitations of its content and recommendations and who will accept responsibility for the application of the material it contains. The American Concrete Institute disclaims any and all responsibility for the stated principles. The Institute shall not be liable for any loss or damage arising therefrom. Reference to this docume