Earthquake Engineering 2012 Lecture 0101 Introduction

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Earthquake Engineering 2012 Lecture 0101 Introduction

  1. 1. EARTHQUAKE QENGINEERING 1.1. Introduction1.1. Definitions1.2. Earthquake Hazards
  2. 2. Earthquake Engineering  1.1.Definitions■ Earthquake Engineering q g g • can be defined as the branch of engineering devoted to mitigating earthquake hazards. In this broad sense, earthquake engineering covers the investigation and solution of the problems created by damaging earthquakes, and consequently the work involved in the practical application of these solutions, i.e. in planning, designing, constructing and managing earthquake-resistant structures and earthquake resistant facilities.■ Scope • Seismicity ,Nature, Measures and Recording of earthquakes. • Planning for Seismic Risk Assessment & Mitigation • Analysis, Design and Construction of Earthquake Resistant Structures • Evaluation of Buildings for Earthquake Resistance • Retrofitting of Earthquake damaged Structures g q g • Earthquake Management and Security Dr.Tharwat Sakr
  3. 3. Earthquake Engineering  1.1.Definitions■ An Earthquake • is the motion or vibration, sometimes violent, of the earth’s surface that follows a release of energy in the earth’s crust. This energy can be generated b a sudden di l d by dd dislocation of segments of the crust, b a i f f h by volcanic eruption, or even by manmade explosions.■ Sources of Ground Movements • Tectonic Earthquakes • Volcanoes • Explosions • Collapse of Mines & Large Reservoirs • Tsunami Dr.Tharwat Sakr
  4. 4. Earthquake Engineering  1.2.Seismic Hazards ■ Failure of Slopes Dr.Tharwat Sakr
  5. 5. Earthquake Engineering  1.2.Seismic Hazards ■ Occurrence of Fire Dr.Tharwat Sakr
  6. 6. Earthquake Engineering  1.2.Seismic Hazards ■ Building Collapse Dr.Tharwat Sakr
  7. 7. Earthquake Engineering  1.2.Seismic Hazards ■ Bridge Collapse Dr.Tharwat Sakr
  8. 8. Earthquake Engineering  1.2.Seismic Hazards ■ Land Slide Dr.Tharwat Sakr
  9. 9. Earthquake Engineering  1.2.Seismic Hazards ■ Disturbance Dr.Tharwat Sakr
  10. 10. Earthquake Engineering  1.2.Seismic Hazards ■ Specific Failures  Collapse of the first storey and damage due to pounding between adjacentCollapse of a high-rise building because of buildings during the Kocaelifailure of the columns at the first storey earthquake, Turkey, August 17, 1999,during the Chi-Chid i th Chi Chi earthquake, T i th k Taiwan, Magnitude 7 4 7.4September 20, 1999, Magnitude 7.6 Dr.Tharwat Sakr
  11. 11. Earthquake Engineering  1.2.Seismic HazardsMay 2008 China Earthquake y q Date : May 12, 2008, 14:28 Magnitude : 8 0 Richter Scale Earthquake 8.0 Location : Sichuan, China Death : 69,016 Missing :18,627 Injured : 373,573 Displaced :15,006,341 :15 006 341 School Destroyed : 6,898 Rescue workers : 130,000 Dr.Tharwat Sakr
  12. 12. Earthquake Engineering  1.2.Seismic Hazards 4.5M homes destroyed Some counties completely wiped off the map More than 11M people Displaced At this moment Dr.Tharwat Sakr
  13. 13. Earthquake Engineering  1.2.Seismic HazardsThousands of tents are needed Food and water are neede Medical M di l supplies are needed li d d Dr.Tharwat Sakr

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