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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: Serviceability Design of Reinforced Concrete Members with Emphasis in Marine Infrastructure
Author(s): Carlos E. Ospina
Publication: Special Publication
Appears on pages(s): 1-24
Keywords: cracking; cracking control; deflections; deflection control; serviceability; serviceability limit state
Abstract:This paper reports design recommendations for flexural cracking and short-term deflection control in reinforced concrete (RC) beam-type elements. The proposed crack control procedures, which have evolved from existing design provisions in ACI 318-08 and AASHTO LRFD 2007, aim at controlling flexural cracking either directly -through the calculation of crack widths-, or indirectly -by prescribing a maximum spacing for the tension reinforcing bars-. The main feature of the proposed crack control procedures is that they are explicitly set up as a function of a limiting crack width value. This approach gives designers the ability to control specific serviceability requirements stipulated by the Owner/User of the structure and is very convenient in those instances where the limiting crack width is less than that tacitly linked to the ACI 318-08 crack control procedure. The proposed deflection control procedures are indirect in nature, aiming at controlling deflections by specifying maximum span/depth ratios based on the concept of limiting curvature and also as a function of both the deflection/span ratio and the maximum allowable crack width. Even though the serviceability design formulations are general in form, emphasis is given to RC beam-type elements in marine infrastructure.
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