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Influence Of Construction Details On The Vibration Performance Of Cold Formed Steel Floor Systems
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Book Synopsis Influence of Construction Details on the Vibration Performance of Cold-Formed Steel Floor Systems by : Brian William Davis
Download or read book Influence of Construction Details on the Vibration Performance of Cold-Formed Steel Floor Systems written by Brian William Davis and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Construction Details on Vibration Characteristics of Cold-formed Steel Floor Systems by : Brian William Davis
Download or read book Influence of Construction Details on Vibration Characteristics of Cold-formed Steel Floor Systems written by Brian William Davis and published by . This book was released on 2008 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vibrations associated with lightweight floor systems, as a serviceability criterion, are not well addressed in current residential construction practice. Cold-formed steel floor systems are usually lighter and have less inherent damping. If designers are going to use the current span deflection criteria when designing residential floor systems, it is imperative to find the construction and design details that will limit these annoying vibrations in cold-formed steel floor systems. Presented in this seminar are the results from a recent laboratory study and field study on the vibration characteristics of cold-formed steel floors performed at the University of Waterloo. Several full-scale floor systems with varying construction and design details were constructed and tested, and several in situ floor systems were tested. The objectives of this research were: to evaluate the dynamic response of residential floor systems supported by cold-formed steel joists; to investigate the influence of span length, joist types, subfloor materials, toppings, ceilings, strongbacks, live loads and framing conditions on the vibration characteristics of cold-formed steel floor systems; to identify the critical construction details that will limit annoying floor vibrations; to compare the vibration characteristics of in situ floor systems and laboratory constructed floor systems; and to evaluate the vibration performance of laboratory and in situ floor systems based on current acceptability criteria.
Book Synopsis Vibration Serviceability and Dynamic Modeling of Cold-formed Steel Floor Systems by : Russell A. Parnell
Download or read book Vibration Serviceability and Dynamic Modeling of Cold-formed Steel Floor Systems written by Russell A. Parnell and published by . This book was released on 2008 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of cold-formed steel as a framework for floor systems in multi-story buildings and single occupancy residences is becoming an increasingly popular alternative to traditional materials and techniques. Builders and designers have recognized that the high strength-to-weight ratio provided by the cross-section of cold-formed steel members permits lighter structures and longer spans. The longer spans and lighter structures associated with cold-formed steel floor systems can result in vibration serviceability issues if proper design considerations are not made. Providing sufficient damping within the structure is the most effective way to ensure that occupants are comfortable under typical residential and office service loads. The modern, open-concept interior has open floor plans with few partitions and long spans, which result in inherently low structural damping. Cold-formed steel floor systems also have less mass than traditional floor systems, which will increase the amplitude of acceleration response. The vibration problems that may be present in cold-formed steel floor systems, like any other floor system, can be addressed if proper consideration is given by designers. Traditional design approaches for vibration serviceability have proven inadequate, and there are no current methods available to designers for calculating the response of cold-formed steel floor systems. In order to design a floor system to properly address occupant comfort, consideration must be given for the type of dynamic loading, resonance, dynamic response, and stiffness of the floor system. The objective of this thesis is to improve the understanding of the dynamic characteristics of cold-formed steel floor systems, and recommend an adequate model for predicting the dynamic response and modal properties of floor systems, in order to aid the design process. This thesis presents the results of an extensive laboratory and field study on the vibration of cold-formed steel floor systems. Floor systems built with cold-formed steel TreadyReady® joists and subfloor assemblies containing OSB, FORTACRETE®, sound reduction board, cold-formed steel deck, and LEVELROCK® topping were examined. Previous research has presented the observed influence of construction details on the modal properties of the laboratory floor systems tested. This thesis discusses the influence of different details on the transverse stiffness of the floor systems. It was found that effectively restrained strongbacks, and cold-formed steel deck subfloor assemblies provided significant increases in transverse stiffness. Based on the analysis of the field testing data, recommended design damping ratios are provided for floor systems constructed with the materials investigated in this study. Floor response that can be compared to serviceability criteria is presented. The peak RMS acceleration from walking excitation was found to be within the acceptable range for the ISO criterion based on residential occupancy, and the static deflection from a 1 kN point load was found to be within the acceptable range of Onysko's criterion. An adequate design criterion for vibration requires a limiting value, and a means of estimating floor response for comparison. The AISC, ATC, and Smith, Chui, and Hu Orthotropic Plate design methods were evaluated by comparing predicted frequency against measured frequency for the test floors. The ATC and Smith, Chui, and Hu Orthotropic Plate methods were evaluated by comparing predicted deflection against measured deflection for the test floors. The ATC method is recommended as the best method for calculating floor response based on current publications. A design procedure is recommended for cold-formed steel floor systems, using the ATC design guide. The ATC acceleration criterion for walking excitation must be met for floors with fundamental frequencies of less than 15 Hz, and the ATC static deflection criterion must be met for all floors. Proposed modifications to the ATC method to improve the design of cold-formed steel floors include: adopting the recommended design damping ratios from this thesis; adopting the frequency-weighted ISO limiting acceleration and, obtaining several coefficients and empirical expressions that are relevant to cold-formed steel floors from further testing. Recommendations for improving the floor testing procedures at the University of Waterloo are given.
Book Synopsis Vibration Serviceability of Cold-formed Steel Floor Systems by : Sigong Zhang
Download or read book Vibration Serviceability of Cold-formed Steel Floor Systems written by Sigong Zhang and published by . This book was released on 2017 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excessive vibration in response to human activities has been a significant problem associated with lightweight steel floor systems, especially cold-formed steel (CFS) floors. Methods for accurately predicting these vibrations and evaluating floor systems are not readily available to the design community. The limited amount and complexity of research on the vibration serviceability of lightweight steel floor systems have shown an urgent need for further investigation. The objective of this research is to evaluate how human walking affects the performance of lightweight steel floor systems. Four important aspects that influence floor vibration performance are investigated: rotationally restrained floor joist ends, structural properties of CFS floors, human-structure interactions, and the applicable design guidelines. The investigation was carried out using an analytical approach in which CFS floor systems are modelled by equivalent orthotropic plates, and the equivalent structural properties are determined by using the Rayleigh method. The method of finite integral transform is extended to obtain the exact series solutions of the bending and vibration of orthotropic plates with rotationally restrained edges. The analytical/numerical results are compared to the results obtained in previous methods and experimental investigations. Then, the significant effects of human occupants on the dynamic properties and responses of lightweight steel floors are examined through the proposed damped plate-oscillator model, which determines frequencies and damping ratios through analytical analysis of coupled floor-occupant systems. The predicted results are compared with previous test results. Three loading models--moving force, moving damped-oscillator, and moving and stationary damped-oscillators are subsequently proposed to obtain the dynamic responses of floor systems to human walking. The analytical results from the three models are compared with the previous test results. After that, parametric studies are conducted on the effects of step frequency, damping ratio, human-to-structure mass ratio, and walking path. The foregoing investigations provide a comprehensive understanding of the dynamic performance of lightweight steel floors affected by human walking. Finally, design guidelines are developed for lightweight CFS steel floors in residential constructions. The floors are classified into three categories based on their fundamental frequencies, i.e. low-, mid-, and high-frequency floors. For each category, the corresponding design criterion and method are proposed. It is the author's desire that the contributions made in this thesis research help engineering practitioners better understand the dynamic responses and vibrational characteristics of lightweight CFS floor systems, particularly on human-structure interactions and ultimately lead to the efficient design of lightweight CFS floor systems that resisting the vibration induced by human walking.
Book Synopsis Recent Trends in Cold-Formed Steel Construction by : Cheng Yu
Download or read book Recent Trends in Cold-Formed Steel Construction written by Cheng Yu and published by Elsevier. This book was released on 2023-11-04 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent Trends in Cold-Formed Steel Construction, Second Edition focuses on the application and use of this important construction material. In this updated edition, new chapters take on these developments, offering updates on cutting-edge new technologies and design methods for using cold-formed steel as a structural material and providing technical guidance on how to design and build sustainable and energy-efficient cold-formed steel buildings. Sections introduce codes, specifications and design methods, provide computational analysis of cold-formed steel structures, examine the structural performance of cold-formed steel buildings, and review thermal performance, acoustic performance, fire protection, floor vibrations and blast resistance. Over the last few years, there has been major breakthroughs for cold-formed steel design with modular building applications now becoming more widely accepted. Other scientific developments include research on system reliability applications, AI machine learning, and the use of high strength steel, as well as new connection methods and changes in DSM codes. Addresses building science issues and provides performance solutions for the design of cold-formed steel buildings Provides guidance for using next generation design methods, computational tools and technologies Edited by an experienced researcher and educator with significant knowledge on new developments in cold-formed steel construction Covers new developments such as modular construction, machine learning and code developments in Europe, Australia and China
Book Synopsis Effects of the Vibration of Structural Parameters on the Vibrational Characteristics of Steel Joist-concrete Slab Floor Systems and Suggested Designs by : Kenneth H. Lenzen
Download or read book Effects of the Vibration of Structural Parameters on the Vibrational Characteristics of Steel Joist-concrete Slab Floor Systems and Suggested Designs written by Kenneth H. Lenzen and published by . This book was released on 1969 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Floor Vibration Design Criterion for Cold-formed C-shaped Supported Residential Floor Systems by :
Download or read book Floor Vibration Design Criterion for Cold-formed C-shaped Supported Residential Floor Systems written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Author's abstract: Annoying floor vibration due to normal human activity was investigated for cold-formed C-shaped residential floors systems. Dynamic impact and static loading tests were performed on twelve full size laboratory floors and five two-joist line laboratory floors to determine the influencing characteristics of annoying vibrations in metal framed floors. Similar tests were conducted on eleven floors located in existing houses. Subjective evaluation, in terms of annoying vibration levels, of all floors was recorded. Four existing floor vibration criteria were investigated: 1) Australian Standard. Domestic Metal Framing Code, 2) Swedish Building Technology Design Guide developed by Professor Sven Ohlsson, 3) United States Proposed Timber Floor Vibration Criterion developed by James Johnson, and 4) Canadian Timber Floor Criterion developed by Donald Onysko. Data collected from testing was used to determine which of the four existing criteria best classified the perceived vibration level of the floors. One criterion is suggested as the most suitable for predicting the perceived vibration level of metal framed residential floors. Three methods to predict the vertical deflection of a floor subject to a concentrated load at mid-bay were examined. The results of applying these methods to the laboratory floors were compared to the actual measured values. The method which correlated the best with the measured values was selected for use in the proposed criterion.
Book Synopsis Dynamics of Coupled Structures, Volume 4 by : Matt Allen
Download or read book Dynamics of Coupled Structures, Volume 4 written by Matt Allen and published by Springer. This book was released on 2016-05-11 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamics of Coupled Structures, Volume 4. Proceedings of the 34th IMAC, A Conference and Exposition on Dynamics of Multiphysical Systems: From Active Materials to Vibroacoustics, 2016, the fourth volume of ten from the Conference brings together contributions to this important area of research and engineering. Th e collection presents early findings and case studies on fundamental and applied aspects of Structural Dynamics, including papers on: • Experimental Dynamic Substructuring • Structural Coupling of Nonlinear Structures • Analytical/Numerical Modeling of Joints • Industrial Applications of Substructuring • Source Identifi cation & Transfer Path Analysis • Human Induced Vibrations • Damping & Friction
Book Synopsis Design of Floors for Vibration by : Andrew L. Smith
Download or read book Design of Floors for Vibration written by Andrew L. Smith and published by . This book was released on 2007-01-01 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Trends in Cold-Formed Steel Construction by : Cheng Yu
Download or read book Recent Trends in Cold-Formed Steel Construction written by Cheng Yu and published by Woodhead Publishing. This book was released on 2016-05-27 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent Trends in Cold-Formed Steel Construction discusses advancements in an area that has become an important construction material for buildings. The book addresses cutting-edge new technologies and design methods using cold-formed steel as a main structural material, and provides technical guidance on how to design and build sustainable and energy-efficient cold-formed steel buildings. Part One of the book introduces the codes, specifications, and design methods for cold-formed steel structures, while Part Two provides computational analysis of cold-formed steel structures. Part Three examines the structural performance of cold-formed steel buildings and reviews the thermal performance, acoustic performance, fire protection, floor vibrations, and blast resistance of these buildings, with a final section reviewing innovation and sustainability in cold-formed steel construction. Addresses building sciences issues and provides performance solutions for cold-formed buildings Provides guidance for using the next generation design method, computational tools, and technologies Edited by an experienced researcher and educator with significant knowledge on new developments in cold-formed steel construction
Download or read book Engineering Journal written by and published by . This book was released on 2000 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Final Report written by Kenneth H. Lenzen and published by . This book was released on with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Final Report written by Kenneth H. Lenzen and published by . This book was released on with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Engineering Index Annual written by and published by . This book was released on 1992 with total page 2264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its creation in 1884, Engineering Index has covered virtually every major engineering innovation from around the world. It serves as the historical record of virtually every major engineering innovation of the 20th century. Recent content is a vital resource for current awareness, new production information, technological forecasting and competitive intelligence. The world?s most comprehensive interdisciplinary engineering database, Engineering Index contains over 10.7 million records. Each year, over 500,000 new abstracts are added from over 5,000 scholarly journals, trade magazines, and conference proceedings. Coverage spans over 175 engineering disciplines from over 80 countries. Updated weekly.
Book Synopsis Vibration Problems in Structures by : Hugo Bachmann
Download or read book Vibration Problems in Structures written by Hugo Bachmann and published by Birkhäuser. This book was released on 2012-12-06 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Authors: Hugo Bachmann, Walter J. Ammann, Florian Deischl, Josef Eisenmann, Ingomar Floegl, Gerhard H. Hirsch, Günter K. Klein, Göran J. Lande, Oskar Mahrenholtz, Hans G. Natke, Hans Nussbaumer, Anthony J. Pretlove, Johann H. Rainer, Ernst-Ulrich Saemann, Lorenz Steinbeisser. Large structures such as factories, gymnasia, concert halls, bridges, towers, masts and chimneys can be detrimentally affected by vibrations. These vibrations can cause either serviceability problems, severely hampering the user's comfort, or safety problems. The aim of this book is to provide structural and civil engineers working in construction and environmental engineering with practical guidelines for counteracting vibration problems. Dynamic actions are considered from the following sources of vibration: - human body motions, - rotating, oscillating and impacting machines, - wind flow, - road traffic, railway traffic and construction work. The main section of the book presents tools that aid in decision-making and in deriving simple solutions to cases of frequently occurring "normal" vibration problems. Complexer problems and more advanced solutions are also considered. In all cases these guidelines should enable the engineer to decide on appropriate solutions expeditiously. The appendices of the book contain fundamentals essential to the main chapters.
Book Synopsis Dynamic Analysis of Cold-formed Steel Joists Subject to Floor Vibrations Due to Human Activity by : Andrew Michael Speck
Download or read book Dynamic Analysis of Cold-formed Steel Joists Subject to Floor Vibrations Due to Human Activity written by Andrew Michael Speck and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transit Noise and Vibration Impact Assessment by : Carl Hanson
Download or read book Transit Noise and Vibration Impact Assessment written by Carl Hanson and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
