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Eighteen large-scale reinforced concrete columns, with concrete compressive strength (fcu) of 55.24N/mm² or 76.15N/mm², were tested under short-term loading. The effective-length-to-depth ratios Le/h) of the columns are 26.2,28.7 or 30.4, load-eccentricity-to-depth ratio (e/h) is 0.25 or 0.50, and steel ratio (p) is 3.35% or 5.24%. The experimental behaviour of the columns is presented and discussed.
P.H. Chuang, S.K. Kong and Emeritus Professor F. K. Kong
Peter Flynn is Technical Director of Techrete’s Irish office at Howth, near Dublin, a company which offers specialist technical and manufacturing skills in architectural precast concrete cladding. A structural engineer, he heads the drawing office team of more than 40 engineers/draftsmen. He spent 12 years working with architects in multi-disciplinary practices such as BDP and RMJM prior to joining the company. He now works
on behalf of the manufacturer with top architects such as Foster & Partners, Terry Farrell and many others, to develop the precast products they need to achieve their design intentions. Cladding is a complex process and demands a lot of time and energy. Projects may be prestigious, in sensitive locations where high-tech solutions need to look traditional, and often involve innovative ideas. He delights in his work, particularly in sitting down with fellow professionals
The premature corrosion of steel reinforcement in concrete structures can be a major problem, particularly in aggressive environments. The increasing cost of repair to corrosion-damaged structures has resulted in the development of alternative non-ferrous materials such as fibre-reinforced plastic (FRP) composites. This paper describes an innovative reinforcing system for concrete columns using purpose-made
prefabricated FRP-filament-wound tubes. The FRP composite provides a barrier to the ingress of chlorides and atmospheric gases, and acts as structural reinforcement for the column. The triaxial confinement of the concrete core due to the FRP composite results in significant increases in both the strength and ductility of the composite
columns. Additionally, the filament-wound tube has suficient rigidity to act as permanent formwork. To determine the short-term behaviour of such FRP compositely-reinforced concrete columns, 121 fullscale concrete columns have been tested to failure.
D. Lillistone and C.K. Jolly