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Seismic behaviour of circular reinforced concrete bridge piers
Heng, Ng K.
78-14, Christchurch, N.Z.,, Canterbury. Univ., Christchurch, N.Z. Dept. of Civil Engineering. Research report, 1978, PDF (530 H38 1978)
The ductility demand of circularly reinforced concrete bridge piers were studied. A series of dynamic inelastic analyses were carried out to study the effect of earthquake types and the natural pier periods on the ductility demand of bridge piers. The effect of flexible foundations on the dynamic response was studied by different methods of modeling foundation flexibility. Results from these studies were compared with The Ministry of Works and Development's (MWD's) ductility requirement. Dynamic analyses were also carried out using a realistic model where soil is replaced by an equivalent system of springs to determine the damping due to soil yielding. Static cyclic tests were carried out on two pier models, one was designed to MWD's requirements, the other, which was highly stressed axially, had a transverse reinforcement in excess of the N.Z. Concrete Draft Code requirements.
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