Stress-Strain Model of Unconfined and Confined Concrete and Stress-block Parameters
MetadataShow full item record
Stress-strain relations for unconfined and confined concrete are proposed to overcome some shortcomings of existing commonly used models. Specifically, existing models are neither easy to invert nor integrate to obtain equivalent rectangular stress-block parameters for hand analysis and design purposes. The stress?strain relations proposed are validated for a whole range of concrete strengths and confining stresses. Then, closed form expressions are derived for the equivalent rectangular stress-block parameters. The efficacy of the results is demonstrated for hand analysis applied for deriving the moment-curvature performance of a confined concrete column. Results are compared with those obtained from a computational fiber-element using the proposed stress-strain model and another widely used model; good agreement between the two is observed. The model is then utilized in the development of a new structural system that utilizes the positive attributes of timber and concrete to form a parallel. Timber has the advantage of being a light weight construction material, easy to handle, is environmentally friendly. However, large creep deflections and significant issues with sound transmission (the footfall problem) generally limit timber use to small spans and low rise buildings. Concrete topping on timber sub-floors mitigate some of these issues, but even with well engineered wood systems, the spans are relatively short. In this study, a new structural system called structural boxed-concrete, which utilizes the positive attributes of both timber and reinforced concrete to form a parallel system (different from timber-concrete composite system) is explored. A stress-block approach is developed to calculate strength and deformation. An analytical stress-block based moment-curvature analysis is performed on the timber-boxed concrete structural elements. Results show that the structural timber-boxed concrete members may have better strength and ductility capacities when compared to an equivalent ordinary reinforced concrete member.
Subjectstress-strain relation for concrete and timber
unconfined and confined concrete
stress-blocks for concrete and timber
timber-boxed concrete system
Murugesan Reddiar, Madhu Karthik (2009). Stress-Strain Model of Unconfined and Confined Concrete and Stress-block Parameters. Master's thesis, Texas A&M University. Available electronically from
Showing items related by title, author, creator and subject.
Evaluation of mechanical properties of high strength concrete for prestressed concrete bridge design Chompreda, Praveen (Texas A&M University, 2001)High strength concrete (HSC) are widely used in prestressed concrete bridges in Texas. However, current design provisions for prestressed concrete bridge structures such as the AASHTO LRFD Specifications (2000) were ...
The relative economy of prestressed concrete bridge designs and handbook data for a number of prestressed concrete beam designs Jones, Truman Ross (Texas A&M University, 1955)Not available
Modeling Deformation of Freezing Concrete: Towards the Identification of D-Cracking Susceptible Aggregates and Construction of All Concrete LNG Tanks Rahman, Syeda Farhana (2016-08-17)For many decades, degradation of concrete by freezing actions has been a primary interest of research for civil engineers. Past studies mostly relied on expensive and time-consuming experimental or semi-empirical investigations ...