METHODOLOGY OF DESIGN OF WIND TURBINE TOWER STRUCTURES
Published In: 3RD INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND CONSTRUCTION ENGINEERING
Author(s): H.I. AHMED , AVELINO ALVES FILHO
Abstract: The present work analyzes the methodology of design of wind turbine tower structures considering the dynamical loads obtained using a spectral formulation for the time distribution of wind velocities. The time varying loads thus obtained comprise those due to the wind action on the tower and those due to wind imposed loads on the nacelle and rotor blades. The analysis comprised the calculation of the tower structure response using the shell element and the beam element methodologies. Stress values obtained with the beam element are then compared with values obtained using the shell element model that takes into account the local stress concentrations. Since the basic objective is the global dynamic response of the structure, beam element models provide an efficient and rapid way to obtain the desired dynamic response. Linear dynamical analyses were obtained using a modal superposition technique and compared to a nonlinear analysis obtained using a direct integration technique. Results
- Publication Date: 11-Dec-2015
- DOI: 10.15224/978-1-63248-079-8-74
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MECHANICAL CHARACTERISTICS OF DUAL-PHASE STEEL B500C AFTER SHOT PEENING PROCESS
Published In: 2ND INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND CONSTRUCTION ENGINEERING
Author(s): AR.DRAKAKAKI, , CH.APOSTOLOPOULOS , K.KOULOURIS
Abstract: During the last decades, many durability problems have been recorded on reinforced concrete (RC) structures, which are located in coastal areas. Chloride corrosion is among the various degradation mechanisms of steel reinforcement which lead to the premature deterioration of RC structures. In this paper, an effort was carried out to increase the corrosion resistance of high ductility dual-phase steel (B500c), without any interference in the chemical composition or in the production mode, but through shot peening process. More specifically, shot peening treatment was used on the one hand in order to clean the surfaces of the steel bars and to remove the “impurities” that act as underlying destructive cores on them, and on the other hand, in order to create surface compressive stresses. The whole process was carried out according to the pertinent protocols, with the use of olivine pellets. Subsequently, the corrosion resistance behavior of the steel was experimentally examined, both with
- Publication Date: 19-Apr-2015
- DOI: 10.15224/978-1-63248-079-8-102
- Views: 0
- Downloads: 0