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 this report, is defined as concrete with compressive strength exceeding 70 MPa (10,000 psi). The report provides highlights of research available on the performance of HSC columns under Monotonically increasing concentric or eccentric compression, and with incrementally increasing lateral deformation reversals and constant axial compression. Research results are used to discuss the effect of cover concrete and parameters related to transverse reinforcement on strength and ductility of HSC columns subjected to concentric load. The behavior of HSC columns subjected to combined axial load and bending moment is discussed in terms of variables related to concrete and transverse reinforcement. In addition to discussion on flexural and axial capacity this report also focuses on seismic performance of HSC columns.