The Experts below are selected from a list of 3627 Experts worldwide ranked by ideXlab platform
Francesco Petrini - One of the best experts on this subject based on the ideXlab platform.
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Wind Induced Vibration mitigation in tall buildings using the tuned mass damper inerter
Journal of Structural Engineering-asce, 2017Co-Authors: Agathoklis Giaralis, Francesco PetriniAbstract:In this paper the classical linear tuned mass-damper (TMD) is coupled with an inerter, a two-terminal device resisting the relative acceleration of its terminals, in various tuned mass-damper-inerter (TMDI) topologies to suppress excessive Wind-Induced oscillations in tall buildings causing occupants’ discomfort. A parametric numerical study is undertaken involving a top-floor-TMD-equipped planar frame capturing accurately the in-plane dynamic behavior of a 74-storey benchmark building exposed to a quasi-stationary spatially-correlated Wind-force field accounting for vortex shedding effects in the across-Wind direction. It is found that the TMDI reduces the peak top floor acceleration more effectively than the TMD by considering smaller attached mass values, and TMDI topologies in which the inerter spans more stories in linking the attached mass to the host structure. Moreover, the inclusion of the inerter reduces dramatically the TMD stroke while it was verified that the magnitude of the developing inerter forces can be readily accommodated by the host structure. Pertinent illustrative examples are included showcasing that the TMDI meets code-prescribed serviceability design requirements for new tall buildings using significantly smaller attached mass compared to the TMD, and that inerter devices can be used to upgrade the performance of existing TMD-equipped tall buildings without changing the attached mass.
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Wind Induced Vibration mitigation in tall buildings using the tuned mass damper inerter tmdi
Journal of Structural Engineering-asce, 2017Co-Authors: Agathoklis Giaralis, Francesco PetriniAbstract:In this paper the classical linear tuned mass-damper (TMD) is coupled with an inerter, a two-terminal device resisting the relative acceleration of its terminals, in various tuned mass-damper-inerter (TMDI) topologies to suppress excessive Wind-Induced oscillations in tall buildings causing occupants’ discomfort. A parametric numerical study is undertaken involving a top-floor-TMD-equipped planar frame capturing accurately the in-plane dynamic behavior of a 74-storey benchmark building exposed to a quasi-stationary spatially-correlated Wind-force field accounting for vortex shedding effects in the across-Wind direction. It is found that the TMDI reduces the peak top floor acceleration more effectively than the TMD by considering smaller attached mass values, and TMDI topologies in which the inerter spans more stories in linking the attached mass to the host structure. Moreover, the inclusion of the inerter reduces dramatically the TMD stroke while it was verified that the magnitude of the developing inerter forces can be readily accommodated by the host structure. Pertinent illustrative examples are included showcasing that the TMDI meets code-prescribed serviceability design requirements for new tall buildings using significantly smaller attached mass compared to the TMD, and that inerter devices can be used to upgrade the performance of existing TMD-equipped tall buildings without changing the attached mass.
Agathoklis Giaralis - One of the best experts on this subject based on the ideXlab platform.
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Wind Induced Vibration mitigation in tall buildings using the tuned mass damper inerter
Journal of Structural Engineering-asce, 2017Co-Authors: Agathoklis Giaralis, Francesco PetriniAbstract:In this paper the classical linear tuned mass-damper (TMD) is coupled with an inerter, a two-terminal device resisting the relative acceleration of its terminals, in various tuned mass-damper-inerter (TMDI) topologies to suppress excessive Wind-Induced oscillations in tall buildings causing occupants’ discomfort. A parametric numerical study is undertaken involving a top-floor-TMD-equipped planar frame capturing accurately the in-plane dynamic behavior of a 74-storey benchmark building exposed to a quasi-stationary spatially-correlated Wind-force field accounting for vortex shedding effects in the across-Wind direction. It is found that the TMDI reduces the peak top floor acceleration more effectively than the TMD by considering smaller attached mass values, and TMDI topologies in which the inerter spans more stories in linking the attached mass to the host structure. Moreover, the inclusion of the inerter reduces dramatically the TMD stroke while it was verified that the magnitude of the developing inerter forces can be readily accommodated by the host structure. Pertinent illustrative examples are included showcasing that the TMDI meets code-prescribed serviceability design requirements for new tall buildings using significantly smaller attached mass compared to the TMD, and that inerter devices can be used to upgrade the performance of existing TMD-equipped tall buildings without changing the attached mass.
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Wind Induced Vibration mitigation in tall buildings using the tuned mass damper inerter tmdi
Journal of Structural Engineering-asce, 2017Co-Authors: Agathoklis Giaralis, Francesco PetriniAbstract:In this paper the classical linear tuned mass-damper (TMD) is coupled with an inerter, a two-terminal device resisting the relative acceleration of its terminals, in various tuned mass-damper-inerter (TMDI) topologies to suppress excessive Wind-Induced oscillations in tall buildings causing occupants’ discomfort. A parametric numerical study is undertaken involving a top-floor-TMD-equipped planar frame capturing accurately the in-plane dynamic behavior of a 74-storey benchmark building exposed to a quasi-stationary spatially-correlated Wind-force field accounting for vortex shedding effects in the across-Wind direction. It is found that the TMDI reduces the peak top floor acceleration more effectively than the TMD by considering smaller attached mass values, and TMDI topologies in which the inerter spans more stories in linking the attached mass to the host structure. Moreover, the inclusion of the inerter reduces dramatically the TMD stroke while it was verified that the magnitude of the developing inerter forces can be readily accommodated by the host structure. Pertinent illustrative examples are included showcasing that the TMDI meets code-prescribed serviceability design requirements for new tall buildings using significantly smaller attached mass compared to the TMD, and that inerter devices can be used to upgrade the performance of existing TMD-equipped tall buildings without changing the attached mass.
Senlin Jiang - One of the best experts on this subject based on the ideXlab platform.
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enhancement of Wind energy harvesting by interaction between vortex Induced Vibration and galloping
Applied Physics Letters, 2018Co-Authors: Xiaokang Yang, Senlin JiangAbstract:Most Wind energy harvesters (WEHs) that have been reported in the literature collect Wind energy using only one type of Wind-Induced Vibration, such as vortex-Induced Vibration (VIV), galloping, and flutter or wake galloping. In this letter, the interaction between VIV and galloping is used to improve the performance of WEHs. For a WEH constructed by attaching a bluff body with a rectangular cross-section to the free end of a piezoelectric cantilever, the measures to realize the interaction are theoretically discussed. Experiments verified the theoretical prediction that the WEHs with the same piezoelectric beam may demonstrate either separate or interactive VIV and galloping, depending on the geometries of the bluff bodies. For the WEHs with the interaction, the Wind speed region of the VIV merges with that of the galloping to form a single region with high electrical outputs, which greatly increases the electrical outputs at low Wind speeds. The interaction can be realized even when the predicted gallop...
Suxia Zhang - One of the best experts on this subject based on the ideXlab platform.
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nonlinear dynamic analysis on the rain Wind Induced Vibration of cable considering the equilibrium position of rivulet
Abstract and Applied Analysis, 2013Co-Authors: Suxia ZhangAbstract:The nonlinear dynamic behavior of rain-Wind-Induced Vibration of inclined cable is investigated with the consideration of the equilibrium position of the moving rivulet. The partial differential governing equations of three-degree-of-freedom on the model of rain-Wind-Induced cable Vibration are established, which are proposed for describing the nonlinear interactions among the in-plane, out-of-plane Vibration of the cable and the oscillation of the moving rivulet. The Galerkin method is applied to discretize the partial differential governing equations. The approximately analytic solution is obtained by using the method of averaging. The unique correspondence between the Wind and the equilibrium position of the rivulet is ascertained. The presence of rivulet at certain positions on the surface of cable is then proved to be one of the trigger for Wind-rain-Induced cable Vibration. The nonlinear dynamic phenomena of the inclined cable subjected to Wind and rain turbulence are then studied by varying the parameters including mean Wind velocity, Coulomb damping force, damping ratio, the span length, and the initial tension of the inclined cable on the model. The jump phenomenon is also observed which occurs when there are multiple solutions in the system.
Masaru Matsumoto - One of the best experts on this subject based on the ideXlab platform.
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rain Wind Induced Vibration of inclined cables at limited high reduced Wind velocity region
Journal of Wind Engineering and Industrial Aerodynamics, 2003Co-Authors: Masaru Matsumoto, Tomomi Yagi, Mitsutaka Goto, Seiichiro SakaiAbstract:Aerodynamic Vibration of stayed cables, especially rain-Wind-Induced cable Vibration, has been a rather serious problem on the design of cable-stayed bridges. This well-known phenomenon occurs at particular high reduced Wind velocity regions and under raining condition. From results of Wind tunnel tests, it might be explained as a vortex-Induced Vibration, which occurs at limited high reduced Wind velocity region. Then, in this study, the effects of water rivulet and the Wind turbulence on the vortex-Induced Vibration at high reduced Wind velocity are investigated by Wind tunnel tests, and the mechanism of the rain-Wind-Induced cable Vibration is tried to be understood comprehensively. Furthermore, the role of Karman vortex in this Vibration is discussed.
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field observation of the full scale Wind Induced cable Vibration
Journal of Wind Engineering and Industrial Aerodynamics, 2003Co-Authors: Masaru Matsumoto, Hiromichi Shirato, Tomomi Yagi, Mitsutaka Goto, Seiichiro Sakai, Jun OhyaAbstract:Abstract Wind-Induced Vibration of inclined cables of cable-stayed bridges is one of the most serious problems in bridge aerodynamics. Especially, the rain–Wind Induced Vibration that can be explained as vortex-Induced Vibration at high reduced Wind velocity has been reported at many cable-stayed bridges in the world. In order to clarify the characteristics and the mechanisms of the rain–Wind Induced Vibration, experimental setup using full-scale cable model was constructed in the field, and aerodynamic behavior of this cable model was observed under various weather conditions. Then the Vibration, which might be considered as the rain–Wind-Induced Vibration, was observed.
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response characteristics of rain Wind Induced Vibration of stay cables of cable stayed bridges
Journal of Wind Engineering and Industrial Aerodynamics, 1995Co-Authors: Masaru Matsumoto, Hiromichi Shirato, Tohru Saitoh, Masahiko Kitazawa, Takayuki NishizakiAbstract:Abstract This paper aims to investigate the various response characteristics of “rain-Wind Induced Vibration” of cables and its fundamental mechanism. A series of Wind tunnel tests has indicated that rain-Wind Induced Vibration of cables can be classified into three types, that is a “galloping” type, which includes both divergent galloping and velocity restricted galloping, related to a negative slope of the lift force caused by an “upper water rivulet” and/or “axial flow”, the vortex-shedding type with long period, and their mixed type. In particular, this velocity-restricted response caused by vortex-shedding is excited by the three-dimensionality of conventional Karman vortex shedding along the cable axis.
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rain Wind Induced Vibration of cables of cable stayed bridges
Journal of Wind Engineering and Industrial Aerodynamics, 1992Co-Authors: Masaru Matsumoto, N Shiraishi, Hiromichi ShiratoAbstract:Abstract This paper provides the exciting factors and mechanism of rain-Wind Induced Vibration of polyethylene-lapped cable of cable-stayed bridges and the aerodynamic countermeasure to suppress the Vibration.
