Structural vibration - Revision history

Designing Buildings at 08:34, 8 November 2020

2020-11-08T08:34:55Z

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	* Vibrations.		* Vibrations.

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Designing Buildings at 12:04, 22 November 2018

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	--[[User:The_Institution_of_Civil_Engineers\|The Institution of Civil Engineers]]		--[[User:The_Institution_of_Civil_Engineers\|The Institution of Civil Engineers]]

−	= ~~Find out more~~ =	+	= Related articles on Designing Buildings Wiki =

−	~~=== Related articles on Designing Buildings Wiki ===~~	+	* Articles by ICE on Designing Buildings Wiki.
−		+
−	* ~~[[User:The_Institution_of_Civil_Engineers\|~~Articles by ICE on Designing Buildings Wiki]].	+
	* Concept structural design of buildings.		* Concept structural design of buildings.
	* Elements of structure in buildings.		* Elements of structure in buildings.
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	* Vibrations.		* Vibrations.

−	[[Category:Standards_/_measurements]] [[Category:Construction_techniques]] [[Category:Design]]	+	[[Category:Standards_/_measurements]] [[Category:DCN_Standard]] [[Category:Construction_techniques]] [[Category:Design]]

Editor at 14:45, 20 October 2017

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	* Structure definition.		* Structure definition.
	* Structures at the end of their design life.		* Structures at the end of their design life.
		+	* Vibrations.

	[[Category:Standards_/_measurements]] [[Category:Construction_techniques]] [[Category:Design]]		[[Category:Standards_/_measurements]] [[Category:Construction_techniques]] [[Category:Design]]

Editor at 12:24, 13 September 2016

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	* Concept structural design of buildings.		* Concept structural design of buildings.
	* Elements of structure in buildings.		* Elements of structure in buildings.
		+	* Limit state design.
	* Structural engineer.		* Structural engineer.
	* Structural principles.		* Structural principles.

Editor at 14:24, 12 August 2016

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	* Elements of structure in buildings.		* Elements of structure in buildings.
	* Structural engineer.		* Structural engineer.
		+	* Structural principles.
	* Structural steelwork.		* Structural steelwork.
	* Structure definition.		* Structure definition.

Designing Buildings at 06:33, 6 August 2016

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	-----		-----
−	This article was originally ~~published~~ by ICE as [https://www.ice.org.uk/news/knowledge/august-2016/engineering-out-bad-vibes 'Engineering out bad vibes'] ~~on 1 Aug 2016~~. It was written by John Ward.	+	This article was originally created by ICE based on [https://www.ice.org.uk/news/knowledge/august-2016/engineering-out-bad-vibes 'Engineering out bad vibes']. The original article was written by John Ward and published on 1 Aug 2016.

	--[[User:The_Institution_of_Civil_Engineers\|The Institution of Civil Engineers]]		--[[User:The_Institution_of_Civil_Engineers\|The Institution of Civil Engineers]]

JC5 at 10:47, 5 August 2016

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	Damping and base isolation can also be used to mitigate the effects of seismic events on buildings. [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.15.00032 Kasinos et al] investigate the response of building subsystems subject to seismic vibration events and present a new methodology giving improved predictions for irregular structures.		Damping and base isolation can also be used to mitigate the effects of seismic events on buildings. [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.15.00032 Kasinos et al] investigate the response of building subsystems subject to seismic vibration events and present a new methodology giving improved predictions for irregular structures.
		+
		+	Jonathan Glancy's book [https://www.theguardian.com/books/2008/dec/20/lost-buildings-review Lost building]s talks of the old Baltic Exchange, shaking due to an IRA terrorist bomb outside, which made the traders scared so they had to move to a new building. Fosters Gherkin was build in its place following demolition.

	= Buffeting breeze =		= Buffeting breeze =

212.159.76.197 at 10:37, 5 August 2016

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	Footfall-induced floor vibration is one of the more commonly encountered sources of structural vibration, particularly where modern lightweight floor structures are used. [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.14.00130 Zhang et al] present the result of an extensive experimental study of lightweight floors constructed using metal-web timber joists to improve vibration performance.		Footfall-induced floor vibration is one of the more commonly encountered sources of structural vibration, particularly where modern lightweight floor structures are used. [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.14.00130 Zhang et al] present the result of an extensive experimental study of lightweight floors constructed using metal-web timber joists to improve vibration performance.

−	In the design of stadia and public assembly buildings, engineers need to make a robust assessment of the dynamic performance of the structure under crowd loading. With reference to a series of experimental studies conducted at the University of Bath, UK, [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.15.00033 Browning] challenges the Institution of Structural Engineers' 2008 dynamic design criteria and proposes a new approach to specifying stadium vibration requirements.	+	In the design of stadia and public assembly buildings, engineers need to make a robust assessment of the dynamic performance of the structure under crowd loading. With reference to a series of experimental studies conducted at the University of Bath, UK, [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.15.00033 Browning] challenges the Institution of Structural Engineers' 2008 dynamic design criteria and proposes a new approach to specifying stadium vibration requirements. These YouTube videos show Frankfurt stadium [https://youtube.com/watch?v=ocOGKxy7onU here], and [https://youtube.com/watch?v=OS1JZQ6yg5I here]. Concrete can flex and bend quite a bit before cracking.

−	The design of lightweight pedestrian bridges is also often governed by the performance under crowd loading. [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.15.00013 Brownjohn et al] experimentally investigate the dynamic performance of The Helix bridge in Singapore (pictured top), which unusually also serves as a viewing platform.	+	The design of lightweight pedestrian bridges is also often governed by the performance under crowd loading. [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.15.00013 Brownjohn et al] experimentally investigate the dynamic performance of The Helix bridge in Singapore (pictured top), which unusually also serves as a viewing platform. The [http://news.bbc.co.uk/hi/english/static/in_depth/uk/2000/millennium_bridge/default.stm London Millenium bridge] in aluminium famously vibrated due to resonance wave produced by people walking, it was closed for 2 years from its opening day for [https://en.m.wikipedia.org/wiki/Millennium_Bridge,_London#Resonance repairs].

	= Shaky ground =		= Shaky ground =

Editor at 09:57, 2 August 2016

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−	[[File:Engineering-out-bad-vibes.jpg\|~~800px~~]]	+	[[File:Engineering-out-bad-vibes.jpg\|link=File:Engineering-out-bad-vibes.jpg]]

	= Introduction =		= Introduction =
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	=== Related articles on Designing Buildings Wiki ===		=== Related articles on Designing Buildings Wiki ===

−	* Articles by ICE on Designing Buildings Wiki.	+	* [[User:The_Institution_of_Civil_Engineers\|Articles by ICE on Designing Buildings Wiki]].
	* Concept structural design of buildings.		* Concept structural design of buildings.
	* Elements of structure in buildings.		* Elements of structure in buildings.

Editor: Created page with "800px = Introduction = The design of modern lightweight structures and buildings in busy and congested cities requires careful considerat..."

2016-08-02T09:56:47Z

Created page with "800px = Introduction = The design of modern lightweight structures and buildings in busy and congested cities requires careful considerat..."

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[[File:Engineering-out-bad-vibes.jpg|800px]]

= Introduction =

The design of modern lightweight structures and buildings in busy and congested cities requires careful consideration of the effects of vibration due to people, traffic and wind.

More than ever before, it is important for civil and structural engineers to manage structural vibration such that occupant comfort, structural durability and performance of specialist equipment can be maintained. Indeed, vibration-related criteria are increasingly found to govern structural design.

In August 2016, the Institution of Civil Engineers (ICE) has therefore published a themed issue ([http://www.icevirtuallibrary.com/toc/jstbu/169/8 169 SB8]) of its Structures and Buildings journal on the latest research and practice related to reducing unwanted structural vibrations.

= Bouncy people =

Footfall-induced floor vibration is one of the more commonly encountered sources of structural vibration, particularly where modern lightweight floor structures are used. [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.14.00130 Zhang et al] present the result of an extensive experimental study of lightweight floors constructed using metal-web timber joists to improve vibration performance.

In the design of stadia and public assembly buildings, engineers need to make a robust assessment of the dynamic performance of the structure under crowd loading. With reference to a series of experimental studies conducted at the University of Bath, UK, [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.15.00033 Browning] challenges the Institution of Structural Engineers' 2008 dynamic design criteria and proposes a new approach to specifying stadium vibration requirements.

The design of lightweight pedestrian bridges is also often governed by the performance under crowd loading. [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.15.00013 Brownjohn et al] experimentally investigate the dynamic performance of The Helix bridge in Singapore (pictured top), which unusually also serves as a viewing platform.

= Shaky ground =

As cities densify and transport networks expand, the problem of rail-induced ground-borne vibration is becoming increasingly significant for new and existing developments. [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.15.00010 Gjelstrup et al]. have developed a novel probabilistic approach to the assessment of structural vibration and structure-borne noise in buildings close to railways.

The provision of base isolation may be used to mitigate the effect of ground-born vibration and re-radiated noise on building occupants. [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.15.00057 Talbot] has undertaken a review of current practice in the design of base isolation and highlights challenges that need to be addressed to move towards a performance-based design approach.

Medical and research facilities containing precision equipment are particularly sensitive to the effects of ground-borne vibration. [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.14.00133 Brownjohn et al] present a case study of the Orion laser facility at the UK Atomic Weapon Establishment, detailing the experimental and numerical studies undertaken to guide its design and to assess performance prior to and during construction.

Damping and base isolation can also be used to mitigate the effects of seismic events on buildings. [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.15.00032 Kasinos et al] investigate the response of building subsystems subject to seismic vibration events and present a new methodology giving improved predictions for irregular structures.

= Buffeting breeze =

In taller buildings, wind-induced lateral vibration frequently governs the serviceability performance of the structure. Criteria used to set lateral acceleration limits are typically based on the concept of avoiding occupant complaint.

However, [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.15.00017 Lamb et al] present new multidisciplinary research that suggests significant vibration serviceability issues can arise at a level of vibration well below that which might give rise to complaint, and indeed at a level that may not even be perceptible to occupants.

Where the level of lateral vibration in a tall building has been identified as excessive, there is often scope for designers to control acceleration levels by introducing additional structural damping.

For many buildings, the use of a tuned liquid column damper is an efficient solution. [http://www.icevirtuallibrary.com/doi/full/10.1680/jstbu.14.00129 Cammelli and Li] present a case study demonstrating the use of experimental and numerical studies to guide design of a large liquid damper in a high-rise structure on the US east coast.

In conclusion, the breadth of papers on the issue shows the level of interest in the dynamic performance of structures and its relevance to civil and structural engineers. As buildings and structures become lighter, urban transport networks expand and brownfield development is pursued, the ability of practising engineers to design out unwanted vibration will become ever more important to satisfy the needs and expectations of society.

-----
This article was originally published by ICE as [https://www.ice.org.uk/news/knowledge/august-2016/engineering-out-bad-vibes 'Engineering out bad vibes'] on 1 Aug 2016. It was written by John Ward.

--[[User:The_Institution_of_Civil_Engineers|The Institution of Civil Engineers]]

= Find out more =

=== Related articles on Designing Buildings Wiki ===

* Articles by ICE on Designing Buildings Wiki.
* Concept structural design of buildings.
* Elements of structure in buildings.
* Structural engineer.
* Structural steelwork.
* Structure definition.
* Structures at the end of their design life.

[[Category:Standards_/_measurements]] [[Category:Construction_techniques]] [[Category:Design]]