Eastern Branch Meeting

Eastern Branch Towards Simplified Models for Assisting With the Performance Evaluation of Base-Isolated Buildings By James Talbot: Cambridge University Engineering Department And Sources of Uncertainty Associated with Rail-Induced Vibration Assessments, by Jorge De Avillez: WSP Thursday 23 May at 7pm ,Colchester
Eastern Branch
Towards Simplified Models for Assisting With the Performance Evaluation of Base-Isolated Buildings
By James Talbot, Cambridge University Engineering Department
Sources of Uncertainty Associated with Rail-Induced Vibration Assessments
By Jorge De Avillez, WSP
Thursday 23 May at 7pm
The Weston Homes Community Stadium
United Way, Colchester, Essex, CO4 5UP
Presentation 1: The design of modern buildings increasingly requires the assessment of ground-borne noise and vibration.  This remains a challenging task, requiring estimates of structural vibration levels, the anticipated human response, and often the assessment of potential mitigation measures.  The latter include base-isolation, in which a building is de-coupled from the ground using isolation bearings to reduce the transmitted vibration.  Despite advances in computational modelling, it is not yet clear how best to estimate the performance of these base-isolated buildings. 
This talk will present an overview of current research aimed at developing a rigorous but efficient method for the practicing engineer faced with evaluating the performance of base-isolated buildings.  The proposed method is based on a staged approach that begins with the expected free-field vibration levels and uses a series of simplified models to account for the “added foundation” and “added building” effects associated with the construction of a new building.
Presentation 2: Rail-induced vibration may adversely affect, both in the form of mechanical vibration and/or structure-borne noise, the serviceability of buildings. With the densification of urban spaces, the tendency is to bring buildings and railways systems into closer contact. In addition, modern construction tends to rely on complex lightweight structures centred on stronger, more lightly damped, materials, raising the building’s responsiveness. An effective rail-induced ground-borne vibration prediction is essential for assessing isolation requirements and propose effective mitigation measures. Many prediction procedures, from empirical to numerical, for estimating the resulting rail-induced vibration on buildings have been proposed, yet not many discuss uncertainty intervals associated with their proposed procedure. Yet, it is critical to recognise how representative the predicted results are to assist the decision process when balancing the predicted benefit with the mitigation cost.
This presentation will briefly address uncertainty associated with vibration measurements and then moves on to establish the impact on uncertainty arising from commonly adopted modelling assumptions.  
CPD Certificates will be available.  
There is no need to book places for this event.  Please direct any questions about the meeting to:-
Jody Blacklock, Secretary Eastern Branch,
For more details of IOA regional branch activities please refer to the IOA website: www.ioa.org.uk 
Subscribe to the IoA event calendar. You can copy and paste this link into any product that supports the ical format:https://calendar.google.com/calendar/ical/instoa%40gmail.com/public/basic.ics
 Directions to the Weston Homes Community Stadium
Postcode for satnav users is CO4 5UP
Driving From London:
Take the A12 towards Chelmsford off M25 and follow A12 beyond Chelmsford towards Colchester
Do not take any of the early exits off the A12 signed Colchester Central but instead carry on to the new Junction 28 (signposted for the Hospital), which takes you directly into the stadium site.
Having turned off onto the slip road, turn right at the first roundabout. Go across the bridge and then go straight over the second roundabout, before turning right into United Way from the third roundabout. You are now at the stadium
Driving From Ipswich:
Take the A12 from Ipswich towards Colchester
Turn off at the new Junction 28, signposted for the Hospital
Turn left at the first roundabout. Turn right into United Way from the second roundabout. You are now at the stadium
Train / Bus:
Take Greater Anglia train to Colchester North Station
First Group buses from North Station to stadium include: No 65
23 May 2019   through   9:00 PM
The Weston Homes Community Stadium
United Way
Colchester, CO4 5UP

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