Title: Tests Of Reinforced Concrete Columns Under Sustained Loading
Author(s): F. E. Richart and R. H. Heitman
Publication: Journal Proceedings
Appears on pages(s): 33-40
Tests of 32 columns of Series 3 of the ACI column investigation, which had been held under sustained loading for 6 years. These columns, some of which had developed steel stresses, due to plastic flow of the concrete, of more than 30,000 psi, showed the same strength as columns that had not been under load. Plain columns, unloaded for 6 years, then placed under sustained load, showed negligible plastic flow.