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Analysis of Wind-Induced Vibration and Fatigue Effects of a Typical Tower Crane |
MA Jin,WANG Zitong,ZHOU Dai,LIAO Linheng,HUANG Zhen
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(School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract Combining the weighted amplitude wave superposition method and the autoregression method, a novel mixture simulation technique that can simulate the time histories of 3D wind velocity series was produced. The wind velocity time series were converted to the time series of 3D wind loadings. For a typical tower crane tower, the parametric mechanical model was established. The analysis of wind-induced vibration responses was conducted by Newmarkβ approach. After obtaining the time histories of the stresses for structural hotspots, the method of S-N curve was used to study the effects of structural fatigue damage. The results show that the time history curves of structural windinduced displacement, velocity and acceleration of each node on the tower are stable respectively and structural wind-induced displacement has certain periodicity. The deformation and fatigue damage on both ends of the boom and the top of the tower are relatively greater. These results are expected to provide reference for the windresistant design of tower structures.
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Received: 11 November 2013
Published: 11 November 2013
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