Analysis of Reinforced/Prestressed Concrete Members Using Advanced Techniques
Open AccessAnalysis of bonded reinforced and prestressed concrete members for flexure should be conducted using the strain compatibility approach as stipulated by the ACI-318 design code published by the American Concrete Institute and the AASHTO LRFD Specifications published by the American Association of Highway and Transportation Officials. The strain compatibility approach has many advantages: (1) it allows for modeling every layer of reinforcement individually rather than summing up all the reinforcement at a single point, (2) it is applicable for analysis of composite concrete sections built with layers of concrete of variable strength and geometry, and (3) it is applicable for regular and irregular shape sections where the concrete section can be sliced into several layers of trapezoidal or triangular strips that accommodates any changes in the geometry. This research utilizes the strain compatibility approach to analyze reinforced and prestressed concrete members subject to pure flexure, flexure and axial force, and axial prestressed force. In addition, this research adopts the power formula to model the stress-strain relationship of various types of reinforcement including mild and high strength reinforcement such as mild steel rebars, strands and threaded rods. This document explains in details the steps that are used to conduct the analysis and can be coded for computer software. As part of this research, the author also developed software for the three applications that can be used as instructional and design tools.
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