basics of earthquake engineering · 2018-01-11 · earthquake engineering dr. s. k. prasad...
TRANSCRIPT
Basics of
Earthquake Engineering
Dr. S. K. Prasad
Professor of Civil Engineering
S. J. College of Engineering, Mysore
Phone : 94496 21994
Global loss due to natural disasters
Loss of life from natural disasters(Source: Herath and Katayama, 1994)
Loss of built environment from natural disasters(Source: Andrew and Robin, 2002)
SlNo
Magnitude Date Place Damage
1 9.5 22/05/1960 Chile 5000 deaths, 20 Lakh homeless
2 9.2 28/03/1964 Alaska 125 deaths, Tsunami
3 9.1 26/12/2004 Indonesia 2.26 Lakh killed, Tsunami
4 9.0 04/11/1952 Russia 0 death, Tsunami
5 9.0 11/03/2011 Japan 15000 deaths, Tsunami
6 8.8 27/02/2010 Chile 500 deaths, Tsunami
7 8.8 31/01/1906 Ecuador 1000 deaths
8 8.6 – 8.9 11/04/2012 Indonesia 0 death
9 8.7 04/02/1965 Alaska 0 death, Tsunami
10 8.6 28/03/2005 Indonesia 1300 deaths
BIGGEST EARTHQUKES RECORDED
5 of the biggest in last 11 years6 of the biggest resulted in TsunamiMore deaths in under prepared countries
Earthquake may be caused by volcanic eruption or by strain building process inside the earth mass.
UNPREDICTABLE
Vibrations of the earth surface caused by waves originating from a source of
disturbance in the earth mass
EARTHQUAKE
Focus and Epicenter of Earthquake
Earthquake Shaking
Earthquakes are UNPREDICTABLE!!!
Typical Seismogram
• Random• Time Dependent• Cyclic
Start of PrimaryWaves
Start of SecondaryWaves
Start of Surface Waves
TraceAmplitude
Strong Motion
Time
SA
Acceleration
• PGA• Predominant Frequency• Duration of Strong Motion
No two earthquake motions are similar
MagnitudeA number – RICHTER Scale M = log 10 A Each increase in M > the energy by 32 times• Strength / Power of earthquake ( Atom bomb – 5.0 )• Measure of strain energy released at hypocenter.• Determined by seismographs• It is independent of place
Moment Magnitude Mw is more popular presently.Mw = μAoD is better to represent bigger earthquakes.
It is based on the seismic moment of the earthquake, which is equal to the rigidity of the Earth multiplied by the size of the area that slipped and average amount of slip on the faultRichter scale suffers from saturation for bigger earthquakes
• Is not Quantitative• Modified Mercalli’s Intensity scale• Measure of damaging effect of earthquake
at a site
Depends on • Local soil conditions • Type of structures• Focal Depth• Knowledge on Earthquake Engg.• Amount of shaking• Frequency Content • Epicentral distance etc.
INTENSITY
How does the amplitude of a magnitude-8 earthquake compare to the amplitude of smaller events?
If we likened earthquakes to hills and mountain peaks, each peak is 10 times the height of the previous one.
Mag. 8 = 10× larger than Mag. 7 = 100× larger than Mag. 6
Mag. 7 = 10× larger than Mag 6Mag. 6
How does the amplitude of a magnitude-8 earthquake compare to the amplitude of a magnitude-6 event?
If we likened earthquakes to hills and mountain peaks...
Fire Crackers of different magnitudes of blasts
I Insignificant Only detected by instruments
II Very LightFelt by sensitive persons, Oscillation of hanging objects
III Light Small vibratory motion
IV ModerateFelt inside building, Noise produced by moving objects
V Slightly Strong Felt by most persons, some panic, minor damages
VI Strong Damage to non seismic resistant structures
VII Very Strong People panic, serious damage to poor construction
VIII Destructive Serious damage to structures in general
IX RuinousSerious damage to well built structures, almost total destruction of non-seismic resistant structures
X Disastrous Only seismic resistant structures remain standing
XIDisastrous in
ExtremeGeneral Panic, almost total destruction, ground cracks & opens
XII Catastrophic Total destruction
Intensity of Earthquake – Modified Mercalli’s Scale
Isoseismal Map of Bhuj (2001)
Intensity of Earthquake – Modified Mercalli’s Scale
Magnitude & Intensity
Richter’s Scale
M M Scale
What are Earthquakes?
• The shaking or trembling caused by the sudden release of energy
• Usually associated with faulting or breaking of rocks
• Continuing adjustment of position results in aftershocks
What is the Elastic Rebound Theory?
• Explains how energy is stored in rocks
– Rocks bend until the strength of the rock is exceeded
– Rupture occurs and the rocks quickly rebound to an undeformed shape
– Energy is released in waves that radiate outward from the fault
What is the Elastic Rebound Theory?
Focus and Epicenter of an Earthquake
• The point within Earth where faulting begins is the focus, or hypocenter
• The point directly above the focus on the surface is the epicenter
Seismographs record earthquake events
At convergent boundaries, focal depth increases along a dipping seismic zone called a Benioff zone
Where Do Earthquakes Occur and How Often?
~80% of all earthquakes occur in the circum-Pacific belt
– most of these result from convergent margin activity
– ~15% occur in the Mediterranean-Asiatic belt
– remaining 5% occur in the interiors of plates and on spreading ridge centers
– more than 150,000 quakes strong enough to be felt are recorded each year
Plate Tectonic Theory
Plate Tectonics – Epicenters of recentearthquakes of moderate magnitude
8 to 10 cmEvery year
Plate Movements
Faults
• Normal Fault
• Reverse Fault
• Strike Slip Fault
Normal Fault
Reverse Fault
Strike Slip Fault
The Economics and Societal Impacts of EQs
Damage in Oakland, CA, 1989• Building collapse
• Fire
• Tsunami
• Ground failure
What are Seismic Waves?
• Response of material to the arrival of energy fronts released by rupture
• Two types:
– Body waves
• P and S
– Surface waves
• R and L
Primary Wave
Secondary Wave
Body Waves: P and S waves
• Body waves
– P or primary waves
• fastest waves
• travel through solids, liquids, or gases
• compressional wave, material movement is in the same direction as wave movement
– S or secondary waves
• slower than P waves
• travel through solids only
• shear waves - move material perpendicular to wave movement
Surface Waves: R and L waves
• Surface Waves
– Travel just below or along the ground’s surface
– Slower than body waves; rolling and side-to-side movement
– Especially damaging to buildings
How is an Earthquake’s Epicenter Located?
Seismic wave behavior
– P waves arrive first, then S waves, then L and R
– Average speeds for all these waves is known
– After an earthquake, the difference in arrival times at a seismograph station can be used to calculate the distance from the seismograph to the epicenter.
How is an Earthquake’s Epicenter Located?
Time-distance graph
showing the average
travel times for P- and
S-waves. The farther
away a seismograph is
from the focus of an
earthquake, the longer
the interval between
the arrivals of the P-
and S- waves
How is an Earthquake’s Epicenter Located?
• Three seismograph stations are needed to locate the epicenter of an earthquake
• A circle where the radius equals the distance to the epicenter is drawn
• The intersection of the circles locates the epicenter
How are the Size and Strength of an Earthquake Measured?
• Modified Mercalli Intensity Map
– 1994 Northridge, CA earthquake, magnitude 6.7
• Intensity
– subjective measure of the kind of damage done and people’s reactions to it
– isoseismal lines identify areas of equal intensity
How are the Size and Strength of an Earthquake measured?
Magnitude
– Richter scale measures total amount of energy released by an earthquake; independent of intensity
– Amplitude of the largest wave produced by an event is corrected for distance and assigned a value on an open-ended logarithmic scale
What are the Destructive Effects of Earthquakes?
• Ground Shaking
– amplitude, duration, and damage increases in poorly consolidated rocks
Can Earthquakes be Predicted?
Earthquake Precursors
– changes in elevation or tilting of land surface, fluctuations in groundwater levels, magnetic field, electrical resistance of the ground
– seismic dilatancy model
– seismic gaps
Can Earthquakes be Predicted?
Earthquake Prediction Programs
– include laboratory and field studies of rocks before, during, and after earthquakes
– monitor activity along major faults
– produce risk assessments
Is prediction ofearthquake possible?????
Perhaps each one of you can get noble prize for providing scientific proof of different available methods.
Animals, fishes and birds are considered Better predictors.
Prediction is still an art. Present advances in technology can not predict, control or Stop earthquakes. We can only attempt To control the damaging effects.
January 2001 January 2003
26th January 2001Bhuj Earthquake of 7.2 Mw Killed > 20000 people
Causes for Earthquake
• Tectonic earthquake
• Volcanic earthquake
• Rock fall or collapse of cavity
• Microseism
• Explosion (Controlled blast)
• Reservoir induced earthquake
• Mining induced earthquake
• Cultural Noise (Industry, Traffic etc.)
Dead & Live loads Wind force
Earthquake Force
Lateral & DynamicVertical & Static
EarthquakeFloodHurricane/ Cyclone
Earthquake Force Vs Wind Force
∑FA = 0Statics
Dynamics∑FA - FI = 0
Dynamics is dangerous & action packed. But interesting
FI = m.a
Inertia ???
Building at RestBuilding at Rest Ground Accelerates to LeftGround Accelerates to Left
Ground Accelerates to RightGround Accelerates to Right Ground & Building at RestGround & Building at Rest
Period of Vibration
Failure of Shear wall
Sliding Rocking Bending
Inertia due to earthquake
Reduce Mass
Earthquake effects on Buildings
Direction offorces on Building
Movement of building
U-DE-W
N-S
Earthquake force
Effects of Earthquake
ACCELERATIONACCELERATION
DECELERATIONDECELERATION
Inertia Force F = m a
Levels of acceleration
• 2007 Honda RA107 F1 race car Accelerates from 0 to 160 kmph in 4 s
• Indian cars 0 to 100 kmph in 18 s
• v = u + at• 100 kmph = 27.77 m/s• v = 27.77 m/s, u = 0 and t = 18 s• a = 1.54 m/s2
• During earthquake 20 m/s2 acceleration can happen in 3 different directions
Level of acceleration during earthquake
Wife asked husband to present some thing big for her birthday
Husband : What shall I get you?
Wife : I would like something that accelerates 0 to 100 in 10 seconds
She was expecting something like this
But, husband presented her with something very different
The husband is in a critical and stable condition in ICU
0 to 60 kmph in 1.6 sec Fastest F1 Car
http://www.zeroto60times.com/formula-one-f1-0-60-times/ dt 14/9/2016
The 2015 Infiniti Red Bull RB11 Formula One race car jets 0 to 60 in only 1.7 seconds, and perhaps even more impressive can reach 190 mph in under 10 seconds. Although top fuel dragsters hold the top spot for fastest accelerating race car class, the F1 race car boasts a range of superior performance stats.Formula One F1 0-60 Times - Zero To 60 Timeswww.zeroto60times.com/formula-one-f1-0-60-times/
http://www.zeroto60times.com/formula-one-f1-0-60-times/ dt 14/9/2016
Best racing Car
May accelerate from 0 to 60 kmph in 1.6 sU = 0V = 16.67 m/sT = 1.6 sA = (V – U) / T = 10.4 m/s2
Maximum recorded earthquake motion = 2g = 20 m/s2
That too in three different directions
Newton’s Laws of Motion&
Earthquake Engineering
Effect of InertiaNewton’s First Law of Motion
Every object continues to remain in its initial status unless acted upon by external force.
Lesson: Wear your Seat Belts
Newton’s Second Law of Motion
Everyone unconsciously knows the second law that heavier objects require more force to move the same distance as lighter objects
Lesson: Do not disturb Bad persons
Newton’s Third Law of Motion
For every action there is an equal and opposite reaction
Rockets Action: Push down on ground with powerful engine.Reaction: Ground pushes the rocket upwards with equal force.
Lesson: If you hit some body, expect the same reaction.
TYPES OF LOADING
CYCLIC OR REPETITIVELOADING
SLOWLOADING
RAPID OR TRANSIENT LOADING
STATIC LOADING
TIME
FO
RC
E
Typical Seismogram
• Random• Time Dependent• Cyclic
Start of PrimaryWaves
Start of SecondaryWaves
Start of Surface Waves
TraceAmplitude
Strong Motion
Time
SA
Acceleration
• PGA• Predominant Frequency• Duration of Strong Motion
No two earthquake motions are similar
Static Vs Dynamic Loading
P
Y
Y(t)
P(t)
Static Loading Dynamic Loading
F = m a
Y(t)
DAMPING AND RESONANCE
Effect of Damping
Effect of Resonance
W
H
H = W * Ah
Pseudo Static or Seismic Coefficient Method
Zone Designation
Zone Factor
Z
Zone II 0.10
Zone III 0.16
Zone IV 0.24
Zone V 0.36
g
S
R
ZIA ah
2
Earthquake Resistant Design Philosophy
Level 1 Design
• Design Basis Earthquake
– Common earthquake which the structure can experience in its life time
– Probability of occurrence in 50 years is more
SYSTEM CAN UNDERGO SOME DISTRESS WITHOUT SERIOUS STRUCTURAL DAMAGE
Level 2 Design
• Maximum Credible Earthquake
– Biggest earthquake that may not be experienced during the life of structure
– Less probability of occurrence in 50 years
SYSTEM SHOULD FAIL, BUT WITH WARNING
Principles of Earthquake Resistant Design
Earthquake Design Philosophy
Roof Displacement
Bas
e S
hea
r
Major
Moderate
Minor
Minor shaking No structural damage
Moderate shaking Repairable structural damage
Major shaking Even irreparable structural damage, but ductile failure !
WTC design was excellent. It experienced DUCTILE failure There was enough warning before collapse (about 40 mnts)
Performance of Building
Disp.
v
Moderate Strength & Stiffness, Ductile
High Strength, High Stiffness, Brittle
Low Strength, Low Stiffness, Brittle
Roof Displacement
Ba
se S
hea
r
Earthquake Resistant Design Philosophy
Structure designed to withstand Inertia at joints
IS13920Ductile Detailing
What is a disaster ?
What is a disaster Management ?It is managing the disaster such that
the loss of life and economic loss are
minimum & common man does not
feel the effect of disaster.
An occurrence inflicting widespread
destruction and distress : calamity,
cataclysm, catastrophe and tragedy.
Disaster may be natural or man made.
Post disasterrecovery
Pre disaster Risk reduction process
Hazard + Risk = Disaster
Disaster Management
Hazard + Risk = Disaster
Risk is ManmadePopulation ExplosionUnscientific constructionIrregular growthIndustrial DevelopmentLack of free space in cityEnvironmental PollutionLack of greeneryWater Pollution etc.
Risk Index = Exposure X Vulnerability
Exposure• Population exposed to natural disaster
such as earthquake, flood, cyclone and drought
Vulnerability• Susceptibility• System Capacity• Individual Capacity
Susceptibility• Public infrastructure : Population without access to sanitation, and
clean water, population in slum• Nutrition: Population under below par nutrition• Poverty• Population below poverty line• GDP
System Capacity• Good governance / corruption• No. of physicians / hospital beds• Insurance coverage• Water resource• Agricultural management
Individual Capacity• Literacy rate• Gender parity• % female representatives in parliament• Life expectancy
Rank Country 2016[2] 2013[3] 2012[4] 2011[5]
1 Qatar 0.08% 0.11% 0.10% 0.02%
2 Malta 0.60% 0.61% 0.61% 0.72%
3 Saudi Arabia 1.14% 1.32% 1.31% 1.26%
4 Barbados 1.32% 1.16% 1.15% 2.44%
5 Grenada 1.42% 1.44% 1.46% 2.29%
6 Iceland 1.52% 1.55% 1.53% 1.56%
7 Bahrain 1.69% 1.81% 1.81% 1.66%
8 Kiribati 1.78% 1.78% 1.78% 1.88%
9 United Arab Emirates 1.97% 2.10% 2.07% 4.09%
10 Sweden 2.12% 2.26% 2.15% 2.00%
11 Norway 2.19% 2.35% 2.31% 2.28%
12 Finland 2.21% 2.28% 2.24% 2.06%
13 Singapore 2.27% 2.49% 2.54% 2.85%
14 Egy pt 2.29% 2.34% 2.33% 2.38%
15 Israel 2.30% 2.49% 2.43% 2.60%
16 Estonia 2.36% 2.52% 2.50% 2.25%
17 Switzerland 2.37% 2.61% 2.59% 2.55%
18 Luxembourg 2.43% 2.68% 2.65% 2.70%
19 Sey chelles 2.55% 2.58% 2.60% 2.68%
20 France 2.62% 2.79% 2.78% 2.76%
21 Oman 2.64% 2.74% 2.72% 2.80%
22 Cy prus 2.68% 2.77% 2.81% 3.46%
23 Denmark 2.89% 3.10% 3.09% 2.86%
24 Lithuania 2.92% 3.18% 3.23% 2.89%
25 Germany 2.95% 3.24% 3.27% 2.96%
26 Ukraine 2.97% 3.14% 3.19% 3.02%
27 Canada 3.01% 3.18% 3.18% 2.57%
28 Spain 3.05% 3.38% 3.40% 3.29%
29 Belgium 3.07% 3.42% 3.48% 3.51%
30 Mongolia 3.08% 3.10% 3.24% 3.43%
31 Belarus 3.11% 3.31% 3.32% 2.98%
32 Poland 3.20% 3.46% 3.53% 3.42%
33 Kuwait 3.28% 3.70% 3.71% 3.71%
34 Latv ia 3.31% 3.48% 3.51% 3.09%
35 Czech Republic 3.37% 3.61% 3.67% 4.15%
36 Slov akia 3.39% 3.63% 3.69% 3.38%
37 Austria 3.39% 3.80% 3.75% 3.41%
38 Slov enia 3.41% 3.69% 3.81% 3.72%
39 Portugal 3.45% 3.80% 3.82% 3.62%
40 Paraguay 3.48% 3.85% 3.84% 4.12%
41 United Kingdom 3.54% 3.71% 3.65% 3.61%
42 Kazakhstan 3.56% 3.84% 3.87% 4.04%
43 Argentina 3.56% 3.76% 3.80% 3.77%
44 Russia 3.58% 3.78% 3.83% 3.56%
45 United States 3.76% 3.99% 3.99% 3.72%
46 Liby a 3.79% 3.93% 3.80% 3.67%
47 Croatia 3.97% 4.24% 4.35% 3.71%
48 Uruguay 4.03% 4.09% 4.12% 3.94%
49 Brazil 4.09% 4.26% 4.30% 4.26%
50 Bahamas 4.14% 3.99% 4.17% 4.52%
51 Australia 4.22% 4.51% 4.57% 4.28%
52 Bulgaria 4.22% 4.43% 4.56% 4.08%
53 Italy 4.42% 4.88% 4.82% 4.74%
54 Equatorial Guinea 4.46% 4.49% 4.47% 6.72%
55 Iraq 4.49% 4.83% 4.95% 5.77%
56 New Zealand 4.55% 4.69% 4.44% 4.28%
57 Jordan 4.58% 4.88% 4.90% 5.13%
58 Boliv ia 4.58% 5.08% 5.13% 5.16%
59 South Korea 4.59% 4.94% 4.89% 4.14%
60 Ireland 4.60% 4.69% 4.50% 4.15%
61 Iran 4.73% 4.92% 4.98% 5.11%
62 Moldov a 4.79% 5.05% 5.23% 4.78%
63 Lebanon 5.01% 5.05% 5.10% 5.01%
64 Nepal 5.12% 5.53% 5.69% 6.15%
65 Botswana 5.14% 5.37% 5.21% 5.56%
66 Turkey 5.20% 5.52% 5.68% 5.38%
67 Hungary 5.32% 5.69% 5.87% 5.49%
68 Namibia 5.37% 5.68% 5.72% 6.63%
69 Tunisia 5.40% 5.90% 5.90% 5.72%
70 Azerbaijan 5.54% 6.19% 6.25% 5.86%
71 South Africa 5.58% 5.80% 5.90% 5.71%
72 Laos 5.59% 5.71% 5.73% 5.80%
73 Sy ria 5.69% 5.67% 5.68% 6.19%
74 Macedonia 5.87% 6.28% 6.10% 6.80%
75 Romania 5.92% 6.61% 6.78% 6.43%
76 Venezuela 5.93% 6.16% 6.13% 6.11%
77 Mexico 5.97% 6.39% 6.39% 6.53%
78 Yemen 5.97% 6.03% 5.98% 6.83%
79 Gabon 6.04% 5.93% 6.20% 6.30%
80 Armenia 6.07% 6.91% 7.05% 6.36%
81 Bosnia and Herzegovina 6.10% 6.42% 6.63% 6.25%
82 Cuba 6.13% 6.51% 6.55% 5.99%
83 Thailand 6.19% 6.34% 6.44% 6.86%
84 Georgia 6.27% 6.83% 6.75% 6.97%
85 Eritrea 6.35% 6.35% 6.44% 7.22%
86 Malay sia 6.39% 6.45% 6.53% 6.69%
87 China 6.39% 6.97% 7.04% 6.90%
88 Turkmenistan 6.44% 6.57% 6.64% 7.18%
89 Colombia 6.45% 6.90% 6.89% 6.86%
90 Morocco 6.45% 7.13% 7.21% 7.17%
91 Angola 6.52% 6.45% 6.56% 8.02%
92 Uganda 6.52% 6.69% 6.75% 7.57%
93 Belize 6.55% 6.62% 6.63% 5.93%
94 Peru 6.59% 7.02% 6.96% 7.82%
95 India 6.64% 7.17% 7.28% 7.68%
96 Greece 6.70% 7.38% 7.81% 8.27%
97 Tajikistan 6.72% 7.35% 7.40% 7.47%
98 Keny a 6.77% 7.08% 7.18% 7.24%
99 Lesotho 6.84% 7.09% 7.22% 7.86%
100 Pakis tan 6.96% 7.21% 7.25% 7.84%
101 Central Af rican Republic 7.03% 6.57% 6.55% 6.95%
102 Ethiopia 7.04% 7.36% 7.35% 7.09%
103 Rwanda 7.09% 7.43% 7.60% 8.68%
104 Serbia 7.12% 7.53% 7.67% 5.44%
105 Congo 7.19% 7.57% 7.38% 7.71%
106 Zambia 7.25% 7.46% 7.44% 8.41%
107 Panama 7.26% 7.49% 7.69% 7.70%
108 Comoros 7.29% 7.52% 7.45% 6.93%
109 Sri Lanka 7.32% 7.67% 7.79% 7.84%
110 Algeria 7.36% 8.13% 8.15% 8.06%
111 Trinidad and Tobago 7.50% 7.65% 7.68% 6.70%
112 Bhutan 7.51% 7.98% 8.17% 13.65%
113 Swaziland 7.52% 7.65% 7.84% 7.37%
114 Ecuador 7.53% 7.77% 7.94% 8.69%
115 Tanzania 7.65% 7.99% 8.11% 8.64%
116 Liberia 7.84% 7.71% 7.86% 9.20%
117 Ky rgy zstan 7.86% 8.43% 8.50% 8.48%
118 Mauritania 7.95% 8.26% 8.43% 9.70%
119 Malawi 7.98% 8.02% 8.18% 8.99%
120 Nigeria 7.98% 8.32% 8.28% 9.03%
121 Sudan 7.99% 7.87% 7.88% 9.25%
122 Guinea 8.20% 8.32% 8.55% 9.49%
123 Netherlands 8.24% 8.76% 8.49% 7.71%
124 Mali 8.39% 8.65% 8.76% 11.51%
125 Ghana 8.39% 8.81% 8.85% 9.35%
126 Suriname 8.44% 8.55% 8.62% 9.25%
127 Uzbekis tan 8.59% 8.66% 8.71% 9.37%
128 Mozambique 8.69% 8.89% 9.09% 9.98%
129 Cote d'Iv oire 8.88% 8.86% 9.00% 9.03%
130 Myanmar 8.90% 9.10% 9.15% 8.54%
131 Af ghanistan 9.50% 9.93% 9.79% 14.06%
132 Albania 9.50% 10.01% 9.96% 9.98%
133 Burkina Faso 9.54% 9.72% 9.74% 11.58%
134 Zimbabwe 10.06% 9.96% 9.87% 9.63%
135 Sierra Leone 10.21% 10.37% 10.58% 11.25%
136 Indonesia 10.24% 10.54% 10.74% 11.69%
137 Burundi 10.28% 10.46% 10.49% 11.56%
138 Djibouti 10.30% 9.84% 9.96% 7.05%
139 Togo 10.36% 10.34% 10.64% 10.40%
140 Senegal 10.38% 10.99% 11.08% 11.76%
141 Cape Verde 10.39% 10.80% 10.88% 9.47%
142 Honduras 10.68% 10.91% 11.02% 12.10%
143 Chad 10.85% 11.06% 11.13% 12.25%
144 Cameroon 10.91% 11.09% 10.96% 14.46%
145 Dominican Republic 10.96% 11.28% 11.63% 12.00%
146 Madagascar 11.15% 11.23% 11.50% 10.27%
147 Niger 11.24% 11.62% 11.93% 14.03%
148 Guy ana 11.39% 11.65% 11.77% 9.02%
149 Benin 11.39% 11.32% 11.42% 10.90%
150 Chile 11.65% 12.28% 12.26% 11.97%
151 Haiti 11.68% 11.88% 11.96% 11.45%
152 Jamaica 11.83% 12.15% 12.15% 12.89%
153 Gambia 12.07% 11.71% 11.84% 13.90%
154 Vietnam 12.53% 12.81% 12.88% 11.21%
155 Japan 12.99% 13.56% 13.69% 13.57%
156 Fiji 13.15% 14.10% 13.53% 11.13%
157 Guinea-Bissau 13.56% 13.09% 13.34% 13.12%
158 Nicaragua 14.62% 15.18% 15.39% 11.91%
159 Mauritius 15.53% 14.89% 15.36% 15.74%
160 Timor-Leste 15.69% 16.37% 17.13% 17.45%
161 El Salv ador 16.05% 16.85% 16.89% 16.49%
162 Papua New Guinea 16.43% 15.90% 15.81% 15.45%
163 Cambodia 16.58% 16.90% 17.17% 16.58%
164 Costa Rica 17.00% 16.94% 17.38% 16.74%
165 Brunei 17.00% 15.58% 15.92% 14.08%
166 Solomon Is lands 19.14% 18.11% 18.15% 23.51%
167 Bangladesh 19.17% 19.81% 20.22% 17.45%
168 Guatemala 19.88% 20.88% 20.75% 20.88%
169 Philippines 26.70% 27.52% 27.98% 24.32%
170 Tonga 29.33% 28.23% 28.62% 29.08%
171 Vanuatu 36.28% 36.43% 36.31% 32.00%
Ranking Country
1 Qatar
3 Saudi Arabia
13 Singapore
20 France
45 USA
87 China
95 India
100 Pakistan
169 Philippines
World Risk Ranking to Natural Disasters
Objectives of Earthquake Disaster Management
1. Saving Life
2. Restricting the amount of damage
3. Organizing efficient & effective rescue measure
4. Providing relief, rehabilitation & reconstruction
5. Forecasting warning
6. Education and Training
7. Earmarking necessary funds
8. Stockpiling of supply
Preparedness - Creation of AwarenessTraining on self help during crisisEducation at schoolsMonitoring SystemWarning MechanismLearning from past disastersMock Drill
Response - Rehabilitation CenterFood, Shelter, Medicine etc.Trained Relief workersLifelines to be re-establishedBringing back normalcyRepair, if need be
Disaster Management
Recovery - Rehabilitation & Reconstruction Building newEnsuring safety against new eventLearning from past disasters
Mitigation - Methods to control damageImprovementAuditing for seismic safety
Disaster Management
1. Prevention is better than cure.
2. Technical awareness among engineers.
3. Improving codal provisions and design aid.
4. Microzonation of the region.
5. Certification from authorized engineers for license.
6. Disaster Insurance.
Disaster Management
Relief efforts are hampered when
1. Disaster occurs at night
2. Electricity fails
3. The visibility is poor
4. There is fall of debris on roads
5. Bridges & harbor facilities suffer damage
6. Climatic conditions are severe
7. Fire breaks
8. There is loss of communication
Local bodies comprise of
1. District Magistrate
2. Police & Civil Defense
3. Public Works
4. Public health & Medical Works
5. Fire Service
6. Utilities (Lifelines) such as gas, electricity, water & sewer mains, transport
7. National Red Cross
8. Personnel from Radio, TV, Telephone, Mobile & Internet services, P&T
+ You, Me & every one
Lifelines• Lifelines are most important systems (basic needs)
for habitation.
• Without lifelines life becomes hampered.
• One of the objectives of disaster management is to stop damage to lifeline or restore it at the earliest.
• Lifelines may be different for different regions depending on lifestyle and availability of resources.
• Drinking water, Electricity, Communication, telephone, road network etc. are lifelines
Potable WaterSewage disposal
ElectricityTelephoneMobile Communication
Roads & Railways
Train service stopped after the earthquake (Unusual in Japan)LIFE LINE will be STOPPED & brought to NORMALCY quickly
• Mock Drill• Awareness Camps• Training in schools• Display Boards
Disaster Preparedness
• Disaster Kits Containing
– Food & Water for Three Days
– First Aid Kit
– Rescue & Repair Tools, Rope
– Flashlights, Battery-Operated Radio, Spare Batteries
• Individuals
– Walking Shoes
– Individual Prescription Medications
(Enough for Three Days)
LESSONS OF DISASTER SAFETY
Requirements of Disaster ManagementSeismograms & Strong Motion Accelerographs
Requirements of Disaster ManagementHeights of Tsunami waves at different locations
Iso-seismal MapA good warning & awareness system
Typical NHK warning in Japan
Isoseismal map of GujaratAfter Bhuj Earthquake 2001
Iso-seismal MapA good warning & awareness system
Disaster Management – Policy makers should take action
Disaster Management – Role of leaders
Disaster Management – Role of leaders
During disaster people will be shocked, in grief, sensitive and needing help & advice
Neither the policy makers nor the general public should PANIC!!!
Rescue work in progress
Disaster Management – Provide food, shelter, medicine, clothings etc.
Disaster Management – Rehabilitation Center
Taking shelter below sturdy tables Awareness & Disaster Management
Taking shelter below sturdy tables Awareness among children & Disaster Management
Protection next to column or strong wall
Protection next to column
Earthquake Resistant ConstructionStrong Column Weak Beam Concept
Disaster Management – search for Rehabilitation Center
Earthquake Resistant
Construction
Earthquake Resistant Construction - Bunga
Why Elevator survived, when rest collapsed ?(in Ahmedabad during the Bhuj earthquake of Jan 2001)
For you to Conclude1. Is the knowledge of Earthquake
engineering important?
2. Is Karnataka prone to earthquakes?Should all buildings in Karnataka bedesigned to resist earthquake and sameforce at all places?
3. Do earthquakes kill people or is it theengineers who kill people?
4. Is it important to strengthen EarthquakeDisaster Management?
It is impossible to stop or predict earthquake. As engineers, let us all unite and move forward & work for reducing calamities due to natural
and man made hazards