• 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.

International Concrete Abstracts Portal


Title: Curved-Bar Nodes

Author(s): Gary J. Klein

Publication: Concrete International

Volume: 30

Issue: 9

Appears on pages(s): 42-47

Keywords: D-region; detailing; standard hook; nodal zone; strut-and-tie model

Date: 9/1/2008

In reinforced concrete design, there are numerous examples where bent bars at the outside of a frame corner resist closing moments, such as beam-column and wall-slab junctions. The forces in these corners can be modeled using strut-and-tie models. In this article, a new modeling technique where a single node is used to model the curved region of the bar is presented. Specific recommendations for design and detailing using strut-and-tie models with curved-bar nodes in frame corners and dapped-end beams are offered. Complete sample calculations are provided in an attachment to the electronic version of this article.


Please enter this 5 digit unlock code on the web page.