Abstract
The effects of soil-structure interaction on the seismic response of tall ( >100 m ) steel and reinforced concrete chimneys are described. Detailed models of a 130m high steel chimney and a 150m high reinforced concrete chimney are used as structural models. The foundations are represented as rigid blocks resting on a uniform viscoelastic soil model. Perfect bonding between the foundation and the soil is assumed. Parametric studies of the interaction effects on the magnitude and distribution of bending moments and shear forces include four soil rigidities and two seismic excitations characterized by very different frequency contents. The results obtained indicate strong interaction effects for intermediate and soft soils ( V s⩽500 m/sec ). The extent of the interaction effects are highly dependent on the characteristics of the seismic excitation.
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