A computer analysis of deflection of statically indeterminate concrete structures

This paper discusses the ability of an analytical method to predict the behavior of statically indeterminate reinforced concrete frames and beams. Deflections predicted using the computer program are compared with the experimental data from tests on frames and continuous beams, conducted at the Cement and Concrete Association, and McGill and McMaster Universities. Reasonably close agreement was noted between the test data and the non-linear analysis results. An unmodified elastic approach, using the transformed cross-sectional areas, did not provide accurate predictions. The conclusion was that complex analytical methods can be used to accurately describe the behavior of most statically indeterminate concrete structures, however, the behavior of joints is not clearly understood. Also, additional data is needed to be able to accurately account for stress history for a wide variety of concrete and steel in use.