Dynamic Performance Investigation of Base Isolated Structures
By Ather K. Sharif
Chapter 1
Introduction, Objectives and Outline of Thesis
1.1 Introduction
1.2 Objectives
1.3 Outline of Thesis
Chapter 2
Railway-induced Vibration – Source and Propagation Characteristics
2.1 Introduction
2.2 Source Characteristics
2.3 Propagation Characteristics
2.4 Prediction of Groundborne Noise and Vibration
2.5 Conclusions
Chapter 3
Effects of Railway-induced Vibration on Buildings
3.1 Introduction
3.2 Effects of Vibration on the Building Structure
3.3 Evaluation of Human Response to Vibration in Buildings
3.3.1 UK Guidance
3.3.2 Validity of VDV guidance in BS6472 (1992) for evaluating Train Vibration
3.3.3 Review of International Experience
3.4 Evaluation of Human response to Noise in Buildings
3.5 Effects of Vibration on Equipment
3.6 Conclusions
Chapter 4
Alternative Vibration Control Measures
4.1 Alternative Vibration Control Measures
4.2 At Source
4.3 In Propagation Path
4.4 At Receiver
4.5 Discussion
4.6 Conclusions
Chapter 5
Theoretical Aspects of Isolation
5.1 Theory of Isolation (SDOF model)
5.2 Alternative Damping Models
5.3 Alternative Methods to Estimate Damping Properties
5.3.1 Logarithmic decrement
5.3.2 Bandwidth of half power points
5.3.3 Nyquist Plot for Circle Fits
5.4 SDOF Base Isolation Models
5.5 MDOF Base Isolation models
5.6 Modal Density
5.7 Dynamic Vibration Absorber
5.8 Transient Pulses
5.9 Starting Transients / Steady State Response
5.10 Wave Interaction
5.11 Conclusions
Chapter 6
Instrumentation and Data Processing
6.1 Introduction
6.2 Transducer
6.3 Digital Data Acquisition Considerations
6.4 Instrumentation
6.5 Signal to Noise ratio
6.6 Considerations for site deployment of Instrumentation
6.7 Post Processing for Spectral Representation
6.8 Transmissibility
6.9 Errors in Estimates
6.9.1 Random and Bias Errors on Auto Spectra
6.9.2 Random Error on Transmissibility
6.9.3 Propagation delays
6.9.4 Non-Stationary Data
6.10 Conclusions
Chapter 7
Dynamic Performance Investigation – Case Study 1
Chapter 8
Dynamic Performance Investigation – Case Study 2
Chapter 9
Dynamic Performance Investigation – Case Study 3
9.1 Introduction
9.2 The Site
9.2.1 Isolated Structure – Eland House
9.2.2 Un-isolated Structure – Watney House
9.3 Measurement Locations
9.4 Instrumentation
9.5 Vertical Measurements
9.6 Horizontal Measurements
9.7 Comparison of Mean Results – Vertical & Horizontal
9.8 Groundborne Noise
9.9 Conclusions
Chapter 10
Outline of Proposed International Standard
10.1 Standards Process – General Principles
10.2 Development of a British Standard
10.3 Development of an International Standard
10.4 Legal Status of Standards
10.5 Existing Standard Concerned with Base Isolation
10.6 The Need for an Additional Standard
Chapter 11
Conclusions and Recommendations
Draft ISO
DRAFT ISO Guidelines for the Measurement, Evaluation and Implementation of Base Isolation Systems to Attenuate Ground Vibration