BS 6472-1:2008
$142.49
Guide to evaluation of human exposure to vibration in buildings – Vibration sources other than blasting
| Published By | Publication Date | Number of Pages |
| BSI | 2008 | 28 |
This part of BS 6472 provides guidance on predicting human response to vibration in buildings over the frequency range 0.5 Hz to 80 Hz. Frequency weighting curves for human beings exposed to whole-body vibration are included, together with advice on measurement methods to be employed. Methods of assessing continuous, intermittent and impulsive vibration are presented.
This part of BS 6472 describes how to determine the vibration dose value, VDV, from frequency-weighted vibration measurements. The vibration dose value is used to estimate the probability of adverse comment which might be expected from human beings experiencing vibration in buildings. Consideration is given to the time of day and use made of occupied space in buildings, whether residential, office or workshop.
NOTE 1 In critical work areas, where vibration criteria more stringent than those for human perception are appropriate, this British Standard does not apply.
NOTE 2 Annex A outlines the way in which methods, results and assessments are to be reported, since great care is needed if satisfactory, repeatable conclusions are to be obtained. Annex B provides worked examples of how measurements and predictions might be interpreted in terms of human reaction. Annex C provides examples of the derivation of values appropriate to this British Standard from historic data.
This British Standard does not give guidance on the probability of equipment malfunction, structural damage or injury to occupants in buildings subject to vibration. Neither is guidance given on legal liability or methods of vibration limitation, although beneficial means to the latter are often implied.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 3 | Contents Introduction 1 1 Scope 1 2 Normative references 2 3 Evaluation of building vibration with respect to human response 2 4 Characteristics of building vibration 8 5 Measuring and estimating building vibration 10 6 Assessment of building vibration with respect to human response 12 Annexes Annex A (informative) Suggested format and content of an assessment report 13 Annex B (informative) Calculation examples of evaluations and assessments 14 Annex C (informative) Derivation of values appropriate to this British Standard from historic data 15 Annex D (informative) Estimation of building vibration 18 Bibliography 20 List of figures Figure 1 – Frequency weighting curve (Wb) appropriate for vertical vibration 4 Figure 2 – Frequency weighting curve (Wd) appropriate for horizontal vibration 4 List of tables Table 1 – Vibration dose value ranges which might result in various probabilities of adverse comment within residential buildings 12 Table C.1 – Wb and Wg frequency weightings including band limiting, and their differences in arithmetic and logarithmic form corresponding to true one-third-octave centre frequencies 17 |
| 5 | Foreword |
| 7 | Introduction 1 Scope |
| 8 | 2 Normative references 3 Evaluation of building vibration with respect to human response 3.1 General |
| 9 | 3.2 Frequency weighting 3.2.1 General 3.2.2 Frequency weighting curves |
| 10 | Figure 1 Frequency weighting curve (Wb) appropriate for vertical vibration Figure 2 Frequency weighting curve (Wd) appropriate for horizontal vibration |
| 11 | 3.3 Thresholds of perception 3.4 Time history of vibration occurrence 3.4.1 General 3.4.2 Continuous vibration 3.4.3 Intermittent vibration 3.4.4 Occasional vibration 3.4.5 Impulsive vibration 3.5 Vibration dose summation |
| 13 | 3.6 Parallel effects 3.6.1 General 3.6.2 Structure-borne noise 3.6.3 Airborne noise |
| 14 | 3.6.4 Induced rattling 3.6.5 Visual effects 3.6.6 Influence of a third party 4 Characteristics of building vibration 4.1 General 4.2 Causes of building vibration 4.2.1 General |
| 15 | 4.2.2 External sources 4.2.3 Internal sources 4.3 Low frequency and high frequency floors |
| 16 | 5 Measuring and estimating building vibration 5.1 General 5.2 Measurement of building vibration 5.2.1 General 5.2.2 Direction of measurement |
| 17 | 5.2.3 Location of measurement |
| 18 | 5.3 Estimation of building vibration 6 Assessment of building vibration with respect to human response Table 1 Vibration dose value ranges which might result in various probabilities of adverse comment within residential buildings |
| 19 | Annex A (informative) Suggested format and content of an assessment report a) General information: b) Information about the vibration under investigation: c) Instrumentation and analysis: d) Measurement procedure: e) Analysis procedure(s): |
| 20 | f) Statement of results: g) Results of predictions of levels of vibration: h) Information about parallel effects: i) Assessment: j) Subjective observations: Annex B (informative) Calculation examples of evaluations and assessments B.1 Example 1: Repeated exposures – determination of VDV over the day |
| 21 | B.2 Example 2: Repeated exposures – determination of eVDV over one day Annex C (informative) Derivation of values appropriate to this British Standard from historic data C.1 General C.2 Case 1: Full unweighted vibration recordings still available C.3 Case 2: Wg-weighted vibration recordings still available |
| 22 | C.4 Case 3: One-third octave weighted or unweighted time histories available |
| 23 | C.5 Case 4: Only the historic VDV is known C.6 Case 5: Only the historic eVDV is known |
| 24 | Annex D (informative) Estimation of building vibration D.1 General D.2 Vibration excitation |
| 25 | D.3 Calculation of building vibration response D.4 Use of simplified methods to estimate building vibration response |
| 26 | Bibliography [1] WYATT, T.A., Design Guide on the Vibration of Floors (SCI Publication 076). Ascot, UK: SCI, 1989. [2] BACHMANN, H., et al. Vibration Problems in Structures – Practical Guidelines. Basel, Switzerland: Birkhäuser Verlag, 1995. [3] BLEVINS, R. Formulas for Natural Frequency and Mode Shape. Melbourne, Florida: Krieger Publishing Company, 2001. [4] NAFEMS (National Agency for Finite Elements, Methods and Standards). A Finite Element Dynamics Primer. Glasgow, UK, 1992. [5] THE ASSOCIATION OF NOISE CONSULTANTS. ANC Guidelines: Measurement and assessment of ground-borne noise and vibration. Fresco, 2001. [6] CONCRETE SOCIETY. Post-Tensioned Concrete Floors Design Handbook (Technical Report 43). Slough, UK, 1994. |
