Comparative analysis of cross-wind load code for high structures with circular sections

Wang, Lei; Wang, Zheng; Huang, Nan; Fan, Xing-Yan; Zhang, Zhenhua

doi:10.1016/j.istruc.2022.07.008

Cited by 3 publications

(1 citation statement)

References 30 publications

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“…When vortex-induced resonance occurs, the impact of turbulence on the structural vibration can be neglected [5]; thus, only the vortex force is taken into account as the across-wind load. Taking into account the dimensions of various sections of the desulfurization tower, the Reynolds number, and the critical wind speed parameters, we refer to numerous standards [46][47][48][49][50][51] for the characteristics and modalities involved in vortex-induced resonance of the desulfurization tower. The detailed analysis process can be found in Appendix B.…”

Section: Across-wind Vibration Control Analysismentioning

confidence: 99%

Performance Evaluation of Inerter-Based Dynamic Vibration Absorbers for Wind-Induced Vibration Control of a Desulfurization Tower

Li,

Zhang,

et al. 2024

Buildings

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High-rise flue gas desulfurization towers are susceptible to wind loads, which can cause instability and failure in the along-wind and across-wind directions. The tuned mass damper (TMD) has been widely applied in the wind-induced vibration control of high-rise structures. To enhance the control performance and reduce the auxiliary mass of TMD, this study focuses on inerter-based dynamic vibration absorbers (IDVAs) for controlling the vibration response of a desulfurization tower. The dynamical equations of the tower–IDVA systems are established under wind loads, and a parameter optimization strategy for IDVAs is proposed by using the genetic algorithm. The performance of the traditional TMD and six IDVAs in the vibration control of the tower are systematically compared. Numerical simulations demonstrate that both the TMD and IDVAs can substantially mitigate the vibration response of the tower. However, compared to the TMD with the same response mitigation ratio, more than 34% of the auxiliary mass can be reduced by two optimal IDVAs. In addition, the energy dissipation enhancement and lightweight effect of the two IDVAs are explained through parametric studies.

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Section: Across-wind Vibration Control Analysismentioning

confidence: 99%

Performance Evaluation of Inerter-Based Dynamic Vibration Absorbers for Wind-Induced Vibration Control of a Desulfurization Tower

Li,

Zhang,

et al. 2024

Buildings

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Comparative Analysis of Steel Chimney Using Indian Standards (IS) & European Norms (EN)

Paswan,

Mishra

2024

IOP Conf. Ser.: Earth Environ. Sci.

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Chimneys, also known as stacks, are vertical structures used to escape harmful gases to higher elevation. The height of the chimney is chosen such that the gases are diluted by air turbulence. The chimney should be analyzed and designed in accordance with the provisions of the relevant design standards. Design codes are documents that are created for the purpose of designing a particular structure. The majority of countries have developed their own design rules based on their geographical, topographical, and climatic characteristics. Thus, efforts are being made to compare European code (EN 1993-3-2) and Indian code (IS:6533-1989) for the design of self-supported steel chimney. In this paper, the focus is on evaluating the results of seismic and wind analysis of self-supported steel chimneys. A 90m self-supported steel chimney is considered for the study. The steel chimney is modeled and analyzed using SAP2000 software for seismic zone III and wind loads of basic wind speed 47m/sec. The top lateral displacements are determined to investigate the structural reaction of the steel stack.

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The Influence of Chamfered and Rounded Corners on Vortex-Induced Vibration of Super-Tall Buildings

Wang

Zhang

2023

Applied Sciences

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In order to study the influence of chamfered and rounded corners on vortex-induced vibration of super-tall buildings, a series of multi-degree-of-freedom (MDOF, in short) aeroelastic models were made, including chamfered-corner models with chamfer ratios of 0%, 2.5%, 5.0%, 7.5%, and 12.5%, and rounded-corner models with rounded ratios of 0%, 12.5%, 15%, and 17.5%. The crosswind displacement response of each aeroelastic model was measured by a laser displacement meter in a wind tunnel. The test results indicate that the crosswind displacement response is significantly reduced when the chamfer ratio increases to 5% or the rounded ratio increases to 12.5%; in particular, the vortex-induced vibration (VIV, in short) response can be reduced by more than 60%, which indicates that the chamfered corner and rounded corner play a good role in restraining the VIV of super high-rise buildings. When the reduced wind speed is small, the reduction of the crosswind response of chamfered and rounded models is mainly caused by the reduction of wind load; when the reduced wind speed approaches the VIV wind speed, the negative aerodynamic damping phenomenon of the model with a proper chamfer ratio and rounded ratio disappears, which shows that the VIV is suppressed not only because the cut corner reduces the wind load but also because the cut corner weakens the aeroelastic effect. Generally speaking, a chamfer ratio of about 7.5% and rounded ratio of about 15% can achieve a good reduction effect on the VIV of super high-rise buildings.

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Comparative analysis of cross-wind load code for high structures with circular sections

Cited by 3 publications

References 30 publications

Performance Evaluation of Inerter-Based Dynamic Vibration Absorbers for Wind-Induced Vibration Control of a Desulfurization Tower

Performance Evaluation of Inerter-Based Dynamic Vibration Absorbers for Wind-Induced Vibration Control of a Desulfurization Tower

Comparative Analysis of Steel Chimney Using Indian Standards (IS) & European Norms (EN)

The Influence of Chamfered and Rounded Corners on Vortex-Induced Vibration of Super-Tall Buildings

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