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Home > Publications > International Concrete Abstracts Portal
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.
Title: A Variable Angle Space Truss Model for Structural Concrete Members Subjected to Complex Loading
Author(s): Basile G. Rabbat and Michael P. Collins
Publication: Special Publication
Appears on pages(s): 547-588
Keywords: beams (supports); bending; compression; deformation; loads (forces); mathematical models; Mohrs circle; prestressed concrete; rectangular beams; reinforced concrete; research; shear properties; strains; stresses; structural analysis; structural design.
Abstract:The paper presents a model capable of predicting the post-cracking response of reinforced and prestressed concrete members subjected to complex loading. The angles of inclination of the compression diagonals in the walls of the truss model are determined from strain compatibility conditions. These compatibility conditions in conjunction with the equilibrium conditions for the truss and the load-deformation relationships for the members of the truss enable the full response of the model to be determined; i.e. the strain in the longitudinal and web reinforcements as well as the various eformations of the beams at all load levels can be predicted. Experimental results are used to confirm the truss model's predictions. It is shown how the truss model could be used in the design office.
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