Abstract
AbstractTo investigate the effect of sustained loads on the ultimate strength of high-strength composite columns using grade 800-MPa steel and 100-MPa concrete, ultimate load tests were performed after long-term loading. Two concrete-encased steel (CES) columns were tested under concentric loading, and a CES column and a concrete-filled steel tube (CFT) column were tested under eccentric loading. The test results showed that stress-relaxation in the concrete and gradual stress-transfer to the steel and longitudinal bars occurred, and the ultimate shrinkage strain and ultimate creep coefficient of the high-strength concrete were estimated as 553 μe and 1.44, which are lower than those of normal-strength concrete but belong to the ranges specified in concrete standards. To confirm the tests, a numerical parametric study was performed, considering the age-adjusted effective modulus and relaxation. The results of the experimental and numerical studies showed that, in the case of the high-strength composite co...
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call