In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Become an ACI Member
Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
American Concrete Institute
38800 Country Club Dr.
Farmington Hills, MI
Chat with Us Online Now
Feedback via Email
Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Rationale for the ACI 440.1R-06 Indirect Deflection Control Design Provisions
Author(s): C.E. Ospina and S.P. Gross
Publication: Special Publication
Appears on pages(s): 651-670
Keywords: deflection; FRP-reinforced members; indirect deflectioncontrol; one-way slabs; serviceability design; tension stiffening
Abstract:Compared to ordinary steel reinforcement, Fiber-Reinforced Polymer (FRP)reinforcing bars have a lower stiffness, display a brittle-elastic response, and possessparticular bond characteristics. The dependence on these distinctive features makesdeflection control in FRP-reinforced concrete beams and one-way slabs a moreelaborate process compared to the traditional serviceability design of steel-reinforcedmembers. This paper reports the rationale and fundamental concepts backing theindirect deflection control procedure for concrete beams and one-way slabs reinforcedwith FRP bars adopted by ACI 440.1R-06. The fundamental procedure can be appliedregardless of the type of reinforcement; it is independent of the member’s stiffnessthrough the cracked stage; and it is expressed as a function of the deflection-spanratio, which allows designers to fully control deflections depending on applicableserviceability limits. The paper also explains the simplifications made to thefundamental procedure that led to the development of the indirect deflection controlprocedure in tabular form found in ACI 440.1R-06, including the method by whichtension stiffening effects are accounted for.
Click here to become an online Journal subscriber