Title: Global Nonlinear Dynamic Analysis of Concrete Chimneys in Frequency Domain
Author(s): Amir M. Horr, Mohammad Safi, and Naser Asadpour
Publication: Structural Journal
Appears on pages(s): 341-350
Keywords: concrete; design; dynamic analysis
The conventional finite element method has been used successfully in linear and nonlinear analyses in concrete chimney structures. The method can be performed by subdividing the large structure into small uniform elements having approximate shape functions. Although this replaces a single complicated structural system into a number of simple uniform elements, in cases of tall concrete chimney structures with cracking and crushing behavior in concrete material and yielding in the reinforcement, the computer time and memory can be large. Hence, it is desirable to search for a procedure requiring a fewer number of elements and also less computer time and effort to model a structure. In this respect, attention is paid to the advanced complex damped spectral element method, which benefits from the more accurate and also mathematically complicated shape functions. The use of advanced spectral element method can help engineers design a complex structure, like a tall concrete tower, with a lower cost and weight. Using a computer program, the proposed formulation has been used to derive the nonlinear dynamic response of a tall concrete chimney.