HIGH-STRENGTH CONCRETE COLUMNS - STATE-OF-THE-ART

This report reviews the state of the knowledge of the behavior of high -strength concrete (HSC) columns. High-strength concrete, as used in t his report, is defined as concrete with compressive strength exceeding 70 MPa (10,000 psi). The report provides highlights of research avail able on the performance of HSC columns under Monotonically increasing concentric or eccentric compression, and with incrementally increasing lateral deformation reversals and constant axial compression. Researc h results are used to discuss the effect of cover concrete and paramet ers related to transverse reinforcement on strength and ductility of H SC columns subjected to concentric load. The behavior of HSC columns s ubjected to combined axial load and bending moment is discussed in ter ms of variables related to concrete and transverse reinforcement. In a ddition to discussion on flexural and axial capacity this report also focuses on seismic performance of HSC columns.