Earthquake resistant building materials - Revision history

Editor at 10:36, 24 March 2021

2021-03-24T10:36:11Z

← Older revision		Revision as of 10:36, 24 March 2021
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	= Introduction =		= Introduction =

−	Seismic events known as earthquakes occur when the earth 'shakes' due to the release of energy below its surface. This energy can be caused by natural events (such as volcanoes or landslides) or occasionally by human activity (such as mine blasts or nuclear experiments) and can cause significant damage to structures in their path.	+	Seismic events known as earthquakes occur when the earth 'shakes' due to the release of energy below its surface. This energy can be caused by natural events (such as volcanoes or landslides) or occasionally by human activity (such as mine blasts or underground nuclear experiments) and can cause significant damage to structures in their path.

	Several building materials have been developed to improve the resilience of structures to earthquakes.		Several building materials have been developed to improve the resilience of structures to earthquakes.

Designing Buildings at 08:35, 24 March 2021

2021-03-24T08:35:38Z

← Older revision		Revision as of 08:35, 24 March 2021
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	= Introduction =		= Introduction =

−	Seismic events known as earthquakes occur when the earth shakes due to the release of energy below its surface. This energy can be caused by natural events (such as volcanoes or landslides) or human activity (such as mine blasts or nuclear experiments) and can cause significant damage to structures ~~that have been constructed within~~ their path.	+	Seismic events known as earthquakes occur when the earth 'shakes' due to the release of energy below its surface. This energy can be caused by natural events (such as volcanoes or landslides) or occasionally by human activity (such as mine blasts or nuclear experiments) and can cause significant damage to structures in their path.

−	Several building materials have been developed to improve the ~~possibility~~ of ~~preservation for~~ structures ~~that may be affected by~~ earthquakes.	+	Several building materials have been developed to improve the resilience of structures to earthquakes.

	= Fibre reinforced paint =		= Fibre reinforced paint =
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	In October 2017, the University of British Columbia introduced a seismic-resistant, fibre-reinforced concrete. Referred to as eco-friendly ductile cementitious composite (EDCC), the material is engineered at the molecular scale to be strong, malleable, and ductile, similar to steel—capable of dramatically enhancing the earthquake resistance of a seismically vulnerable structure when applied as a thin coating on the surfaces.		In October 2017, the University of British Columbia introduced a seismic-resistant, fibre-reinforced concrete. Referred to as eco-friendly ductile cementitious composite (EDCC), the material is engineered at the molecular scale to be strong, malleable, and ductile, similar to steel—capable of dramatically enhancing the earthquake resistance of a seismically vulnerable structure when applied as a thin coating on the surfaces.

−	EDCC combines cement with polymer-based fibres fly ash and other industrial additives, making it highly ~~sustainable~~, according to UBC civil engineering professor Nemy Banthia, who supervised the work.	+	EDCC combines cement with polymer-based fibres, fly ash and other industrial additives, making it highly resilient, according to UBC civil engineering professor Nemy Banthia, who supervised the work.

−	To test its effectiveness, the product was sprayed on walls to a thickness of 10mm, which was deemed sufficient by the research team. The test walls were then subjected to high levels of ~~vibrations~~ (equivalent to the magnitude 9.0–9.1 earthquake that struck Tohoku, Japan in 2011) and other types and intensities of earthquake. After passing all tests, EDCC was given its first real-life application in the seismic retrofit of a Vancouver elementary school.	+	To test its effectiveness, the product was sprayed on walls to a thickness of 10mm, which was deemed sufficient by the research team. The test walls were then subjected to high levels of vibration (equivalent to the magnitude 9.0–9.1 earthquake that struck Tohoku, Japan in 2011) and other types and intensities of earthquake. After passing all tests, EDCC was given its first real-life application in the seismic retrofit of a Vancouver elementary school.

	The research was funded by the UBC-hosted Canada-India Research Centre of Excellence IC-IMPACTS, which promotes research collaboration between Canada and India. IC-IMPACTS has made EDCC available to retrofit a school in Roorkee in Uttarakhand, a highly seismic area in northern India.		The research was funded by the UBC-hosted Canada-India Research Centre of Excellence IC-IMPACTS, which promotes research collaboration between Canada and India. IC-IMPACTS has made EDCC available to retrofit a school in Roorkee in Uttarakhand, a highly seismic area in northern India.

Editor at 20:17, 23 March 2021

2021-03-23T20:17:32Z

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−	\| [[File:JapanEarthquake.jpg]]	+	\| [[File:JapanEarthquake.jpg\|link=File:JapanEarthquake.jpg]]
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	\| Rescue teams in Natori, Japan search for missing people in the aftermath of the 2011 quake.		\| Rescue teams in Natori, Japan search for missing people in the aftermath of the 2011 quake.
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	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =

−	* Concrete fibre	+	* Concrete fibre.
	* Cool paint.		* Cool paint.
	* Earthquakes and the seismic strengthening of churches.		* Earthquakes and the seismic strengthening of churches.
	* Earthquake Design Practice for Buildings.		* Earthquake Design Practice for Buildings.
	* Fly ash.		* Fly ash.
−	* Glass fibre reinforced concrete	+	* Glass fibre reinforced concrete.
	* Managing and responding to disaster.		* Managing and responding to disaster.
	* Paints and coatings.		* Paints and coatings.

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2021-03-23T20:16:14Z

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{|
| [[File:JapanEarthquake.jpg]]
|-
| Rescue teams in Natori, Japan search for missing people in the aftermath of the 2011 quake.
|}

= Introduction =

Seismic events known as earthquakes occur when the earth shakes due to the release of energy below its surface. This energy can be caused by natural events (such as volcanoes or landslides) or human activity (such as mine blasts or nuclear experiments) and can cause significant damage to structures that have been constructed within their path.

Several building materials have been developed to improve the possibility of preservation for structures that may be affected by earthquakes.

= Fibre reinforced paint =

In 2014, a team of researchers at The University of Tokyo introduced glass-fibre reinforced paint referred to as SG2000. Headed up by Kenjiro Yamamoto, the team began experimenting with techniques that could be used to retrofit masonry structures in areas where earthquakes were likely to occur.

Their research resulted in the development of SG2000 - a coating made from standard acrylic-silicone paint resin and glass fibres. During laboratory tests, the coating, which is simple to apply to existing structures, was able to help keep bricks connected after mortar joints - which had been covered with the coating - were broken (thus reducing the likelihood of injury caused by falling bricks). It also showed that the coating - which did not increase the test building’s stiffness - allowed masonry structures to bend rather than break or collapse.

= Earthquake resistant concrete =

In October 2017, the University of British Columbia introduced a seismic-resistant, fibre-reinforced concrete. Referred to as eco-friendly ductile cementitious composite (EDCC), the material is engineered at the molecular scale to be strong, malleable, and ductile, similar to steel—capable of dramatically enhancing the earthquake resistance of a seismically vulnerable structure when applied as a thin coating on the surfaces.

EDCC combines cement with polymer-based fibres fly ash and other industrial additives, making it highly sustainable, according to UBC civil engineering professor Nemy Banthia, who supervised the work.

To test its effectiveness, the product was sprayed on walls to a thickness of 10mm, which was deemed sufficient by the research team. The test walls were then subjected to high levels of vibrations (equivalent to the magnitude 9.0–9.1 earthquake that struck Tohoku, Japan in 2011) and other types and intensities of earthquake. After passing all tests, EDCC was given its first real-life application in the seismic retrofit of a Vancouver elementary school.

The research was funded by the UBC-hosted Canada-India Research Centre of Excellence IC-IMPACTS, which promotes research collaboration between Canada and India. IC-IMPACTS has made EDCC available to retrofit a school in Roorkee in Uttarakhand, a highly seismic area in northern India.

Other EDCC applications include resilient homes, pipelines, pavements, offshore platforms, blast-resistant structures and industrial floors.

= Related articles on Designing Buildings Wiki =

* Concrete fibre
* Cool paint.
* Earthquakes and the seismic strengthening of churches.
* Earthquake Design Practice for Buildings.
* Fly ash.
* Glass fibre reinforced concrete
* Managing and responding to disaster.
* Paints and coatings.
* Ultra high performance fibre concrete.

= External resources =

* Kenjiro Yamamoto, Muneyoshi Numada and Kimiro Meguro, [http://www.ers.iis.u-tokyo.ac.jp/PDF/ERSNo.50/2017-03-No.50-07.pdf Shake table tests on one-quarter scaled models of masonry houses retrofitted with fiber reinforced paint].
* University of British Columbia, [https://news.ubc.ca/2017/10/10/ubc-researchers-develop-earthquake-resistant-concrete-2/ UBC researchers develop earthquake-resistant concrete].

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