The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	Behavior of R/C columns under nonproportional variations in axial and lateral loads
Author:	Ahsan, Kaniz Fatema
View Online:	njit-etd1993-056 (xiv, 112 pages ~ 3.7 MB pdf)
Department:	Department of Civil and Environmental Engineering
Degree:	Master of Science
Program:	Civil Engineering
Document Type:	Thesis
Advisory Committee:	Saadeghvaziri, M. Ala (Committee chair) Hsu, C.T. Thomas (Committee member)
Date:	1993-01
Keywords:	Reinforced concrete -- Testing Columns, Concrete -- Testing Axial loads -- Mathematical models
Availability:	Unrestricted
Abstract:	The study on the behavior of reinforced concrete columns subjected to the motion of earthquake suggests that the structure may experience nonproportional variations in axial and lateral forces. In order to assess the capacity of a reinforced concrete structure under nonproportional loadings, an analytical model is developed using the fiber modeling technique. The method is based on detailed analytical description of the geometry and material properties used in evaluating the behavior of the critical regions rather than a simplified and predefined set of hysteresis rules. The present study has two principal components of investigation. First, the analyses are done at the section level, to determine the influence of nonproportional axial and lateral loadings on the moment-curvature relationship for various loading level, P-M interaction diagram, degree of confinement of concrete, amount of reinforcing steel etc. Second, analyses on the response of R/C columns in terms of load-displacement hysteresis loops and curvature distribution along the height of the column subjected to nonproportinal variation in axial and lateral loads. Furthermore, the effect of degree of concrete confinement on the response of the R/C columns are also investigated. Finally, the model results are compared with experimental and other analytical models.