Floor Vibration Control as a Serviceability Requirement in Design Standards and Practices: Review

Jaafari, Chaimaa; Mohammadi, Jamshid

doi:10.1061/(asce)sc.1943-5576.0000361

Cited by 9 publications

(10 citation statements)

References 23 publications

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“…The RTHS test was proposed to observe the uncertainty of mechanical behaviors of the AMD, which was influenced by floor accelerations. The importance of serviceability requirements of civil and building structures are also considered in building design (Jaafari and Mohammadi, 2018), and a mass damper installation is also regarded as effective for improving occupants' comfort and protecting nonstructural elements. Goorts et al proposed a novel concept of a deployable control system (DCS) with an AMD to apply the short-term vibration mitigation of a lightweight bridge.…”

Section: Rths For Mass Damper Systemmentioning

confidence: 99%

Real-Time Hybrid Test Using Two-Individual Actuators to Evaluate Seismic Performance of RC Frame Model Controlled by AMD

Mukai

Yokoyama

Fushihara

et al. 2020

Front. Built Environ.

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The seismic responses of a single-story reinforced concrete (RC) frame building model under control using an active mass damper (AMD) are demonstrated through a real-time hybrid simulation (RTHS) method. In this study, the RTHS test is carried out by using a hydraulic actuator and a shaking table under synchronization. Most parts of the target RC frame model are provided as an analytical model for an online computer simulation, and only the single column of the first story is prepared as an experimental substructure. A hydraulic actuator deforms the actual RC column, and uncertainty or nonlinearity of the RC column's behavior is focused on in this RTHS test. At the same time, a control device of AMD is actually tested under a situation of installing it on the target building's floor. The floor response of the target building model is generated using a shaking table . A control motion of the AMD is manipulated based on an online simulation of the entire RC building model. Firstly, a time delay compensation of the hydraulic actuator is considered. Time delay parameters are identified using a combination model of a time lag and a first-order delay. A PID controller and a time series compensator are applied to improve actuator performances. Next, the reproducibility of the RTHS test using two-individual actuators is evaluated. The tracking of a restoring force and deformation of the actual RC column specimen generated by the hydraulic actuator and floor motion responses reproduced on the shaking table are investigated. To improve the online numerical simulation based on the measured force responses of the RC column specimen, a high-pass filter (HPF) is applied for a force correction to utilize its phase-lead property. The effect of this HPF force correction is evaluated in both a linear region and a strong nonlinear region of the actual RC column specimen. Finally, the RTHS test results are compared to fully numerical simulations and the control effect of the AMD to increase the damping effect for the target RC building model is also investigated.

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Section: Rths For Mass Damper Systemmentioning

confidence: 99%

Real-Time Hybrid Test Using Two-Individual Actuators to Evaluate Seismic Performance of RC Frame Model Controlled by AMD

Mukai

Yokoyama

Fushihara

et al. 2020

Front. Built Environ.

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“…With the advancements in structural technology and modern trends in building design, unwanted vibration of structures is sometimes experienced due to less inherent damping under human excitation 1–4 . For the case of residential houses and buildings, the vibration problems caused by human‐induced excitations reduce the environmental quality and the acoustical comfort for the occupants 5,6 . The vibration problems are important in terms of comfort and serviceability 7,8 …”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4] For the case of residential houses and buildings, the vibration problems caused by human-induced excitations reduce the environmental quality and the acoustical comfort for the occupants. 5,6 The vibration problems are important in terms of comfort and serviceability. 7,8 Application of dynamic response control techniques to the floor system can be effective in suppressing the impact noise, and various methods have been applied to vibration control in the engineering field.…”

Section: Introductionmentioning

confidence: 99%

Independent modal space phase‐lead velocity feedback control of floor vibration

Xue

Igarashi

Kachi

2022

Structural Contr & Hlth

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Summary Dynamic components of the control systems involving actuator time delay can strongly influence the dynamics of the controlled floor system. In this paper, an independent modal space design process for active control of floor vibration caused by human‐induced impact excitation is developed based on modal direct velocity feedback control with a phase‐lead compensator using the root locus method to enhance the stability margins and increase the damping of each filtered mode. Spillover effects under residual modes are considered through the placement of the actuator and sensors. Verification experiments using a steel plate specimen are conducted for the proposed procedure, and the test result shows that effective reduction of the vibration level is successfully achieved.

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“…Slender long-span floors are more vulnerable to vibrations caused by various human activities, which may adversely affect occupant comfort [2]. Proper estimation and control of floor vibrations during the design stage is essential because rectification of the floor subject to excessive vibration after completion of construction could be costly and annoying [3][4][5]. Supriyadi found that the maximum vertical displacement of an auditorium floor doubled as a result of a group of persons dancing in unison in response to live music [6].…”

Section: Introductionmentioning

confidence: 99%

Vibration Performance of Flat Plate Concrete Floors With Codified Minimum Thickness

Nguyen¹

2022

GEOMATE

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Limiting vibrations to ensure occupant comfort is a serviceability requirement that should be considered in the design of floor systems. Current concrete design codes do not explicitly address the issue of vibrations when providing guidelines for calculation of the slab thickness of a flat plate floor. Concrete codes have introduced several methods of determination of the slab thickness or span-to-thickness ratio on the basis of deflection control. The objective of this article is to investigate to what extent a flat plate floor with codified minimum thickness would meet the requirement for walking-induced vibration control. The modal properties of flat plate floors spanning 6-9 m were determined and the 90th percentile velocity response to walking excitation was calculated using probability-based design charts developed by a European guideline on floor vibrations. For deflection control, on average the floor designed following the European concrete code was 6% thinner than the floor designed using the American concrete code and 34% thinner than the floor designed according to the Australian concrete code. It was interestingly found that the vibration of a floor that was dimensioned for deflection control as per any of the three concrete design codes well met the acceptance criteria for human comfort in office buildings, residential buildings, hotels and schools. In addition, the vibration of a 9-m-span floor whose slab thickness was determined using the Australian concrete code provisions could even be acceptable for critical areas.

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Floor Vibration Control as a Serviceability Requirement in Design Standards and Practices: Review

Cited by 9 publications

References 23 publications

Real-Time Hybrid Test Using Two-Individual Actuators to Evaluate Seismic Performance of RC Frame Model Controlled by AMD

Real-Time Hybrid Test Using Two-Individual Actuators to Evaluate Seismic Performance of RC Frame Model Controlled by AMD

Independent modal space phase‐lead velocity feedback control of floor vibration

Vibration Performance of Flat Plate Concrete Floors With Codified Minimum Thickness

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