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Structural Engineering and Mechanics Volume 58, Number 6, June25 2016 , pages 967-988 DOI: https://doi.org/10.12989/sem.2016.58.6.967 |
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Wind load effects and equivalent static wind loads of three-tower connected tall buildings based on wind tunnel tests |
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Shitang Ke, Hao Wang and Yaojun Ge
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| Abstract | ||
| Due to the significant aerodynamic interference from sub-towers and surrounding tall buildings, the wind loads and dynamic responses on main tower of three-tower connected tall building typically change especially compared with those on the isolated single tall building. This paper addresses the wind load effects and equivalent static wind loads (ESWLs) of three-tower connected tall building based on measured synchronous surface pressures in a wind tunnel. The variations of the global shape coefficients and extremum wind loads of main tower structure with or without interference effect under different wind directions are studied, pointing out the deficiency of the traditional wind loads based on the load codes for the three-tower connected tall building. The ESWLs calculation method based on elastic restoring forces is proposed, which completely contains the quasi-static item, inertia item and the coupled effect between them. Then the wind-induced displacement and acceleration responses for main tower of three-tower connected tall building in the horizontal and torsional directions are investigated, subsequently the structural basal and floor ESWLs under different return periods, wind directions and damping ratios are studied. Finally, the action mechanism of interference effect on structural wind effects is investigated. Main conclusions can provide a sientific basis for the wind-resistant design of such three-tower connected tall building. | ||
| Key Words | ||
| three-tower connected tall building; wind tunnel test; equivalent static wind load; wind loads; wind effect; interference effect | ||
| Address | ||
| Shitang Ke, Hao Wang: Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Yudao Road 29, Nanjing 210016,China Yaojun Ge: State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Siping Road 1239, Shanghai 200092, China | ||