Like all other tall structures, determination of wind loads is important for industrial reinforced concrete chimneys. All countries use different wind load standards. These different wind load standards are compared with each other in some studies. For example, in one study by Zhou et al., major international codes and standards for tall buildings were compared.In the first part of this study, modelling information about 10 selected industrial reinforced concrete chimneys is given. All structural and material information about the chimneys are given in the first section. In addition, the first mode natural periods of model chimneys are given. In the second part of this study, procedures of standards used for calculating wind loads are introduced. These standards are ACI 307/98, CICIND 2001, DIN 1056, Eurocode 1 and TS 498. In the third part of the study, the calculated wind loads according to these five standards are shown and compared with each other. In the last part of the study, a conclusion and discussion part is taking place. Copyright © 2010 John Wiley & Sons, Ltd.

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Industrial reinforced concrete (RC) chimneys are tall and slender structures that need repair and strengthening in their service lives. Fiber-reinforced polymers (FRPs) are continuously becoming a popular material that is used for strengthening purposes of RC structures. The purpose of this study is to determine the effect of FRP strengthening on dynamic responses of industrial RC chimneys. A 75-m-high industrial RC chimney with an opening on the body was selected for FRP strengthening. First, three-dimensional finite element model of the chimney and its modal analyses were performed in ANSYS software. Then, linear transient analyses of the chimney were carried out by using 1992 Erzincan Earthquake ground motion record. After that, body of chimney was strengthened with FRP composite, and dynamic analyses were performed. Finally, dynamic responses of chimney before and after FRP strengthening, such as displacements and maximum-minimum principal stresses, were compared. At the end of the study, it was seen that displacements increased along the height of the chimney, maximum and minimum principal stresses occurred at the region of opening and base for all analysis, respectively. Also, it was seen from this study that FRP strengthening is effective on the dynamic response of industrial RC chimneys.

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