Dynamic response of large concrete tower structures with passive or active damping is important in terms of performance under dynamic loads. Structural instability mostly arises as a result of losing the energy capacity in the system, which forces the system to act as a mechanism. The purpose of this paper is to present three different finite element models to investigate the linear and nonlinear response of the Tehran telecommunication tower. The tower is ranked the fourth tallest structure in the world and has been under construction since 1997. Using a mathematical model, an efficient method is used to take into account the cracking and crushing of the reinforced concrete material as well as large deformation effects. The linear and nonlinear dynamic characteristics of the large tower may be defined by using an advanced formulation for the concrete element. Then, the proposed advanced element is used to model a full‐scale finite element mesh to derive the dynamic response of the Tehran telecommunication tower structure with use of a computer program. Copyright © 2001 John Wiley & Sons, Ltd.
Seismic response of large concrete tower structures with passive or active damping is important in terms of performance under earthquake loads. The conventional finite element method has been used successfully in linear and nonlinear analyses in large concrete 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 with a number of simple uniform elements, in cases of tall concrete tower structures with cracking and crushing behaviour in the 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 fewer elements and also less computer time and effort to model the 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. Use of the advanced spectral element method can help engineers to design a complex structure, such as a tall concrete tower, with lower cost and lower weight. Using a computer program, the proposed formulation has been used to derive the nonlinear dynamic response of the 435‐m Tehran Telecommunication Tower. Copyright © 2002 John Wiley & Sons, Ltd.
Conventional finite element method has been used successfully in linear and nonlinear analyses in tall chimney structures. The method can be performed by subdividing the large structure with small uniform elements having approximate shape functions. Although this replaces a single complicated structural system with the 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 lesser 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 to 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 non-linear dynamic response of tall concrete chimney.
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