http://www.habitables.co.uk/feature-2/japans-earthquake-buildings-a-history

Sendai Earthquake, March 11, 2011

Japan: Population: 127,350,000 Area: 145,925 sq mi Population density: 873.1/sq mi

The 1891 Nobi Earthquake

The 1923 Kanto Earthquake

Post WW2 Japan, and building regulations

• Development of seismic design codes• Vulnerability assessment of existing construction• Retrofit technology of vulnerable construction

• Evaluation of damage to affected construction,• Repair and strengthening of damaged construction

• Isolation units are the basic elements of base isolation system which are intended to provide the mentioned decoupling effect to a building or non-building structure.

• Isolation components are the connections between isolation units and their parts having no decoupling effect of their own.

upload.wikimedia.org/wikipedia/commons/0/07/Tuned_mass_damper.gif

Taipei 101 Tuned Mass Damper

“ . . . move with the earth, rather than trying to resist it”

Mass dampers – Vibration Control

Base Isolation

Lateral Forces

World's Largest Earthquake Shake Test in Japan

http://www.youtube.com/watch?v=W4nLwwXhEag

http://www.nytimes.com/interactive/2011/03/13/world/asia/satellite-photos-japan-before-and-after-tsunami.html?src=tptw

Fukushima Daiichi Nuclear Plant

North of Sendai

Sendai