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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"Floor Vibrations"”.
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Active control of floor vibrations
… is often not considered a dynamic system, is the floor of a building. In many cases the dynamics of a floor system are neglected in the design phase of a building structure. Occasionally, this omission results in a floor which has dynamic characteristics found to be unacceptable for the intended …
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Control of human induced floor vibrations
With the growing demand for open, column-free floor spaces and the advances in material strength, floor vibration serviceability criterion has been of growing importance within the past 20-30 years. All floor systems are flexible and when introduced to a dynamic loading respond in a vibratory …
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Methods to reduce transient floor vibrations
Modern lightweight floor systems are susceptible to annoying vibrations induced by the forcing action of human locomotion. This investigation considered several experimental methods to reduce unwanted floor motion as well as analytical procedures aimed at a better understanding of the phenomenon. A …
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An Experimental and Analytical Investigation of Floor Vibrations
Several areas of research regarding floor vibrations were studied during the process of this research. A basic literature review of previous work in the field of floor vibrations is presented along with a summary of the study. The first area of study involved a comparison of finite element models …
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Floor Vibrations: Girder Effective Moment of Inertia and Cost Study
… analysis comparing composite and non-composite floor systems that meet vibrations design standards, were conducted. The first study was undertaken because over-prediction of girder effective moment of inertia was the suspected cause of several recent vibration problems in floors supported by …
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The use of tuned mass dampers to control annoying floor vibrations
Floor vibrations due to occupancy activities on a floor are sometimes annoying to the occupants. Correcting floor vibrations is difficult and can be expensive. The use of tuned mass dampers to control annoying floor vibrations is sometimes a viable solution. Tuned mass dampers (TMDs) have been used …
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Finite Element Modeling for Prediction of Low Frequency Floor Vibrations Due to Walking
Floor vibration serviceability is a primary design consideration for steel framed floors. Designers in North America typically use the AISC Design Guide 11 methods to check this limit state, but its methods are difficult to apply to atypical floor framing. Finite element analysis is a logical …
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Vibration Serviceability Assessment of a Steel Modular Floor System
A new modular steel floor system, named FastFloor, is proposed for commercial buildings. The system is conceptualized to be prefabricated at the shop and ready to be installed on a previously erected skeleton frame structure consisting of girders and columns or connected to core shear walls. The …
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Prediction of Floor Vibration Response Using the Finite Element Method
Several different aspects of floor vibrations were studied during this research. The focus of the research was on developing a computer modeling technique that will predict the fundamental frequency of vibration and the peak acceleration due to walking excitation as given in AISC Design Guide 11, …
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Application of Magneto-Rheological Dampers in Tuned Mass Dampers for Floor Vibration Control
… (MR) dampers to mitigate annoying floor vibrations. Annoying floor vibration is becoming more common in today's building structures since building materials have become stronger and lighter; the advent of computers has resulted in "paperless" offices; and the use of floors for …
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Strain-deflection relationships of freely vibrating wood beams
… about the vibrational behavior of residential floors. This concern resulted in a need for methods of sensing floor vibrations. Some investigators have sensed floor vibrations with electric resistance strain gauges bonded to the underside of the floor joists. These experiments using strain gages …
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Evaluation of A "Floating" Aerobics Floor
Aerobics dance floors often produce annoying floor vibrations in adjacent parts of a building due to the rhythmic impact of the aerobicists. Various types of shock absorbing aerobics and dance floors are widely used to prevent injuries to the participants, but the floors may not prevent vibrations …
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Methods to improve the vibration characteristics of joist supported floor systems
… efficient designs of steel joist-concrete slab floor systems. Though the structural integrity is rarely compromised, these floor systems are more susceptible to human-induced vibrations which may be annoying to the occupants of the structure. The purpose of this investigation was to develop …
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In-home Gait Health Monitoring using Machine Learning and Ambient Sensing
… sensors into the home environment. An ambient floor sensing approach is presented which uses the vibrations in the floor naturally created by footfalls to monitor gait. A few accelerometers are used to measure these signals, lowering the sensor density for easier deployability while minimizing …
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Vibrations in Lightweight Buildings - Perception and Prediction
… Drawbacks in such buildings are disturbing vibrations and noise propagating in the construction, especially through junctions. In lightweight constructions using timber floors, vibrations can cause some nuisances for the inhabitants and complaints are often reported. Still, no vibration …
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A Single-Stage Passive Vibration Isolation System for Scanning Tunneling Microscopy
… surface, the device is prone to noises due to vibrations from the surroundings. To minimize the random noises and floor vibrations, passive vibration isolation is a commonly used technique due to its low cost and simpler design compared to active vibration isolation, especially when the entire …
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A Study of Computer Modeling Techniques to Predict the Response of Floor Systems Due to Walking
… analysis program to predict the response of a floor system due to walking excitation as given in AISC Design Guide 11, Floor Vibrations Due to Human Activity (Murray, et al., 1997) was explored. This research included ideal floors that did not have measured values as well as several case study …
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A Multi-Sensor Passive Occupant Localization
… that determines occupant positions by analyzing floor vibrations caused by footfall patterns. Unlike traditional localization techniques that rely on visual or radio-based sensing, vibro-localization leverages accelerometers fixed to the floor to capture vibro-measurements, offering a …
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ILoViT: Indoor Localization via Vibration Tracking
… idea is that when a person's footstep-generated floor vibrations can be detected and located then it becomes possible to locate persons moving within a building. Vibration propagation in buildings has complexities not encountered by acoustic or radio wave propagation in air; thus, conventional …
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Study To Improve The Predicted Response Of Floor Systems Due To Walking
… the fundamental natural frequencies of floors were explored. Improvements for predicting the behavior of floor systems using several criteria were also investigated. The final topic compared the AISC and SCI methods for analyzing vibrations acceptability. Natural frequency prediction was …
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