Spectrum Analysis-Based Model for the Optimal Outrigger Location of High-Rise Buildings

Zhou, Ying; Xing, Lili; Zhou, Guangxin

doi:10.1080/13632469.2019.1622610

Cited by 14 publications

(6 citation statements)

References 33 publications

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“…Figure 2 displays the two-side spectral density. The mathematical expression is developed in Equation (15). This gives a view on the repartition of the energy of the bounded noise.…”

Section: Mathematical Modellingmentioning

confidence: 99%

“…They can adjust the magnitude of the control force. A large number of theoretical and experimental studies have been done [15][16][17][18][19]. The results reveal that among the different types of control devices, MR dampers are a promising type.…”

Section: Introductionmentioning

confidence: 99%

“…The structural system will be subjected to combined wind and earthquake loads. It is assuming that the perimeter columns are axially very stiff [15]. Therefore, the effect of its dynamic response will be assumed neglected during this investigation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Vibration reduction on a cantilever Timoshenko beam control subjected to combined effects of wind and earthquake loads using damped outriggers

Metsebo

Ndemanou

Chamgoué

et al. 2021

International Advanced Researches and Engineering Journal

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This paper deals with the combined effects of wind and earthquake on the dynamic response of a cantilever structure. It is mainly composed of the core-structure, multi-outriggers with magneto-rheological (MR) dampers localized at different levels along of the structure and perimeter columns. These control devices are semi-active in nature and exhibit a nonlinear behaviour. One of their interesting characteristics is their ability to add supplementary energy dissipation to the structural system. Exposed to combined wind and earthquake loads, the core-structure is modelled using a Timoshenko cantilever beam. The stochastic approach based on the statistic properties is employed to estimate the degree excitations of the two natural hazards. The peak Root-Mean-Square (RMS) are evaluated to quantify the optimal location of damped outriggers. Defined as the control algorithm based on human reasoning, the Fuzzy logic is used to select the appropriate current that feeds the control devices. The obtained results indicate that the application of the fuzzy logic further minimizes the effects of bending-moment and shear force. All of these enhance the performance of the whole structural response and lead to a significantly reduction of excessive vibration to an acceptable level.

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“…Figure 2 displays the two-side spectral density. The mathematical expression is developed in Equation (15). This gives a view on the repartition of the energy of the bounded noise.…”

Section: Mathematical Modellingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Vibration reduction on a cantilever Timoshenko beam control subjected to combined effects of wind and earthquake loads using damped outriggers

Metsebo

Ndemanou

Chamgoué

et al. 2021

International Advanced Researches and Engineering Journal

View full text Add to dashboard Cite

show abstract

“…Te conventional outrigger (CO) systems that confgure outriggers between the perimeter columns and the core have shown to be efective to reduce the overall lateral displacement of the building and the base bending moment of the core and thus ensure the safety of tall buildings under static lateral loads such as mean wind load [1,2]. However, the majority of the external excitations that tall buildings encounter are dynamic loadings [3], and the CO systems are difcult to provide sufcient damping to suppress excessive vibration for high-rise structures [4][5][6][7][8]. Terefore, extra energy dissipation means are generally needed for tall buildings to improve the seismic safety.…”

Section: Introductionmentioning

confidence: 99%

Stochastic Optimization and Sensitivity Analysis of the Combined Negative Stiffness Damped Outrigger and Conventional Damped Outrigger Systems Subjected to Nonstationary Seismic Excitation

Zhou

Fang

Zhang

2023

Structural Control and Health Monitoring

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In recent years, various kinds of damped outrigger systems, particularly with the negative stiffness devices, have been shown to effectively suppress excessive vibration induced by earthquake and wind. To gain insight into such systems, this paper proposes a stochastic optimization method to investigate optimal configurations of combined negative stiffness damped outriggers (NSDOs) and conventional damped outriggers (CDOs) subjected to nonstationary stochastic seismic excitation. The simplified analysis model of various combinations of damped outriggers is developed, and the state-space representation of outrigger systems is then formulated. The nonstationary seismic excitation is modeled as a uniformly modulated stationary Gaussian process with a time-modulating function following Clough–Penzien spectrum, and combining equations of motions of outrigger systems and seismic excitation gives rise to the augmented state-space representation of structure-damper-excitation and subsequently the differential Lyapunov equation. The optimal designs of damped outriggers are defined via the solution of the differential Lyapunov equation. The multiobjective optimization with Pareto optimal fronts is adopted to deal with conflicting objectives between harmful interstory drift and floor absolute acceleration. The sensitivity of negative stiffness devices on optimal objectives is also investigated. The optimal designs are further examined under real typical and near-fault earthquake records. The results demonstrate the efficacy of the proposed method and provide insight into the systems subjected to nonstationary seismic excitation. While the purely NSDO systems could have better performance with adequate negative stiffness devices, the proposed combined NSDO and CDO systems prove to be more effective with limited negative stiffness devices and thus provide more design flexibilities tailored to different application situations.

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“…Designers are constantly trying to increase the load-bearing capacity of such systems and the comfort of people staying inside through the use of innovative solutions and materials or methods of monitoring. Some examples can be found in [1,2].…”

Section: Introductionmentioning

confidence: 99%

Non-Linear Response of Cable-Mass-Spring System in High-Rise Buildings under Stochastic Seismic Excitation

2021

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In high-rise buildings earthquake ground motions induce bending deformation of the host structure. Large dynamic displacements at the top of the building can be observed which in turn lead to the excitation of the cables/ropes within lift installations. In this paper, the stochastic dynamics of a cable with a spring-damper and a mass system deployed in a tall cantilever structure under earthquake excitation is considered. The non-linear system is developed to describe lateral displacements of a vertical cable with a concentrated mass attached at its lower end. The system is moving slowly in the vertical direction. The horizontal displacements of the main mass are constrained by a spring-viscous damping element. The earthquake ground motions are modelled as a filtered Gaussian white noise stochastic process. The equivalent linearization technique is then used to replace the original non-linear system with a linear one with the coefficients determined by utilising the minimization of the mean-square error between both systems. Mean values, variances and covariances of particular random state variables have been obtained by using the numerical calculation. The received results were compared with the deterministic response of the system to the harmonic process and were verified against results obtained by Monte Carlo simulation.

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Spectrum Analysis-Based Model for the Optimal Outrigger Location of High-Rise Buildings

Cited by 14 publications

References 33 publications

Vibration reduction on a cantilever Timoshenko beam control subjected to combined effects of wind and earthquake loads using damped outriggers

Vibration reduction on a cantilever Timoshenko beam control subjected to combined effects of wind and earthquake loads using damped outriggers

Stochastic Optimization and Sensitivity Analysis of the Combined Negative Stiffness Damped Outrigger and Conventional Damped Outrigger Systems Subjected to Nonstationary Seismic Excitation

Non-Linear Response of Cable-Mass-Spring System in High-Rise Buildings under Stochastic Seismic Excitation

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