Energy limit method for strength design of reinforced concrete beams

This paper deals with innovative strength design methods for reinforced concrete beam structural elements and is based on the energy limit concept. Proposed theory introduces two centers of rotation in the cross section of a beam element. These two centers are located at the upper and lower edges of the beam element and account for tension and compression in concrete beam cross-section and totally eliminate the need of determining the true location of neutral axis. Proposed method of analysis is very simple to use, yet powerful enough to accurately account for highly complex cross sections and reinforcement arrangements. Proposed theory is illustrated by numerous examples and its validity is demonstrated by comparison with ACI-318 procedure. All data presented in this paper can be obtained from www.openseismic.com