Optimization Design of Coupling Beam Metal Damper in Shear Wall Structures

Zhang, Zhe; Ou, Jinping; Li, Dongsheng; Zhang, Shuaifang

doi:10.3390/app7020137

Cited by 37 publications

(18 citation statements)

References 13 publications

(15 reference statements)

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“…Usually, the dimension of the data is unified by the translation to standard deviation transformation and the shift to range transformation [37][38][39][40][41], and the fuzzy matrix in fuzzy clustering is obtained. If the degree of similarity which is the coefficient of similarity [42][43][44][45][46][47][48].…”

Section: Fuzzy Cluster Analysis Modelmentioning

confidence: 99%

Location Selection of Logistics Center in e-Commerce Network Environments

Chen¹

2017

AJNNA

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Abstract:The site selection of logistics center is a very complicated and enormous system problem. Each site selection method and model is based on a certain premise and hypothesis. The site selection decision of distribution center has an important influence on the whole logistics system operation. A good location of urban logistics sites is important for optimizing the logistics network, and improving the urban traffic conditions, and level of logistics services. Motivated by this, in this paper, based on the research of sixteen cities in southeastern China and neural network algorithms, we proposed a logistics center location selection algorithm. Our method considers the six important concepts reflecting the performance index of the city logistics, such as city location quotient, market prosperity degree, proportion of freight volume, urban centricity, per capita gross domestic product (GDP), and population size. Our method conducts the nested fuzzy analytic hierarchy process (AHP), and then investigates the total ranking of the single order hierarchy to select suitable logistics centers.

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Section: Fuzzy Cluster Analysis Modelmentioning

confidence: 99%

Location Selection of Logistics Center in e-Commerce Network Environments

Chen¹

2017

AJNNA

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“…In the passive approach, dampers, such as magneto-rheological dampers, fluid viscous dampers, particle dampers and tuned mass dampers (TMDs), have been utilized to suppress structural vibration and dissipate vibration energy of the controlled structures [14][15][16][17][18][19][20][21][22][23][24]. A typical TMD device mainly consists of a spring-mass system and a damper, with mainly the spring-mass-damper model usually being used to investigate the characteristics of TMDs [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Robustness of an Eddy Current-Tuned Mass Damper

Chen

et al. 2017

Applied Sciences

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Abstract:In this paper, an eddy current tuned mass damper (ECTMD) is utilized to control the vibration of a cantilever beam. The robustness of the ECTMD against frequency detuning is experimentally studied in cases of both free vibration and forced vibration. The natural frequency of the cantilever beam can be adjusted by changing the location of a lumped mass. For purposes of comparison with the ECTMD, the robustness of a tuned mass damper (TMD) is also studied. The experimental results in the free vibration case indicate that the ECTMD works well both in tuned and detuned situations, and the equivalent damping ratio of the cantilever beam equipped with the ECTMD is 2.08~5.91 times that of the TMD. However, the TMD only suppresses the free vibration effectively in the tuned situation. With forced vibration, the experimental results also demonstrate the robustness of the ECTMD in vibration suppression in detuned cases. On the other hand, the cantilever beam with TMD experiences 1.63~2.99 times the peak vibration of that of the ECTMD control.

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“…It is nearly impossible for the designers to fully predict the excitations during the service stage; if the designers try to enhance the capacity of the structure against all possibilities, the loadings will largely increase the cost of the construction. Structural control is considered to be an effective approach to adapt the host structures to different kinds of harmful excitations and enhance their safety and serviceability [1][2][3]. Passive control approaches, such as tuned-mass-dampers (TMD), viscous dampers, viscoelastic dampers, and base isolation techniques have advantages of low cost and easy implementation [4].…”

Section: Introductionmentioning

confidence: 99%

PTMD Control on a Benchmark TV Tower under Earthquake and Wind Load Excitations

2017

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A pounding tuned mass damper (PTMD) is introduced by making use of the energy dissipated during impact. In the proposed PTMD, a viscoelastic layer is attached to an impact limitation collar so that energy can be further consumed and transferred to heat energy. An improved numerical model to simulate pounding force is proposed and verified through experimentation. The accuracy of the proposed model was validated against a traditional Hertz-based pounding model. A comparison showed that the improved model tends to have a better prediction of the peak pounding force. A simulation was then carried out by taking the benchmark Canton Tower, which is a super-tall structure, as the host structure. The dynamic responses of uncontrolled, TMD-controlled and PTMD controlled system were simulated under wind and earthquake excitations. Unlike traditional TMDs, which are sensitive to input excitations and the mass ratio, the proposed PTMD maintains a stable level of control efficiency when the structure is excited by different earthquake records and different intensities. Particularly, more improvement can be observed when an extreme earthquake is considered. The proposed PTMD was able to achieve similar, or even better, control effectiveness with a lower mass ratio. These results demonstrate the superior adaptability of the PTMD and its applicability for protection of a building against seismic activity. A parametric study was then performed to investigate the influence of the mass ratio and the gap value on the control efficiency. A comparison of results show that better control results will be guaranteed by optimization of the gap value.

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Optimization Design of Coupling Beam Metal Damper in Shear Wall Structures

Cited by 37 publications

References 13 publications

Location Selection of Logistics Center in e-Commerce Network Environments

Location Selection of Logistics Center in e-Commerce Network Environments

Experimental Study on Robustness of an Eddy Current-Tuned Mass Damper

PTMD Control on a Benchmark TV Tower under Earthquake and Wind Load Excitations

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