1 / 15

SBST – Core elective: Earthquake Resistant Construction Semester VI

SBST – Core elective: Earthquake Resistant Construction Semester VI. Chandra Bhakuni -0594. During the semester. Introductions Basics of earthquakes History of earthquakes and damaging earthquakes Understanding seismic exposure and loss assessment

Download Presentation

SBST – Core elective: Earthquake Resistant Construction Semester VI

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. SBST – Core elective: Earthquake Resistant ConstructionSemester VI Chandra Bhakuni -0594

  2. During the semester • Introductions • Basics of earthquakes • History of earthquakes and damaging earthquakes • Understanding seismic exposure and loss assessment • Seismic analysis; and design and detailing (RCC and Masonry)

  3. Basics of Earthquakes Movement of Body Earth diameter — 12,742 km

  4. Basics of Earthquakes Plate Tectonics - a theory -

  5. Basics of Earthquakes Plate Tectonics wikipedia

  6. Basics of Earthquakes Plate Tectonics • http://www.abag.ca.gov/bayarea/eqmaps/fixit/ch2/sld003.htm

  7. Basics of Earthquakes Plate Tectonics • http://www.abag.ca.gov/bayarea/eqmaps/fixit/ch2/sld004.htm

  8. Basics of Earthquakes • Release of energy from earth’s crust • Type of Waves • Body Waves (P wave & S wave) • Surface Waves • Rayleigh waves

  9. Basics of Earthquakes Seismic Hazard Global Seismic Hazard Assessment Program (GSHAP) - 1992

  10. Basics of Earthquakes India Seismic Risk Zones Bureau of Indian standards IS 1893 (Part 1) - 2002 http://www.iitk.ac.in/nicee/EQTips/EQTip04.pdf

  11. Basics of Earthquakes • Branch of Structural Dynamics Simplified SDOF ‘equation of motion’ f(t) = ma + kt + cu Or’ f(t) = cu + ků + mϋ F = Shear Force m = Mass k = Stiffness c = damping coefficient a = acceleration T = time period U = displacement

  12. Basics of Earthquakes Single degree of freedom (SDoF) oscillator Natural Frequency, fn, Where,fn = Natural Frequency (Hertz ) or (No. of Cycles/Second)k = Element Stiffness (N/m)m = Element Mass (kg) Radian frequency, ωn = 2π fn

  13. Basics of Earthquakes History of Earthquakes Some Big Reported events in last 10 years 2010 04 13 - Southern Qinghai, China - M 6.9Fatalities 2,968 2010 01 12 - Haiti region - M 7.0Fatalities 222,570 2009 09 30 - Southern Sumatra, Indonesia - M 7.5Fatalities 1,117 2008 05 12 - Eastern Sichuan, China - M 7.9Fatalities 87,587 2005 10 08 - Pakistan - M 7.6Fatalities 86,000 2004 12 26 - Sumatra-Andaman Islands - M 9.1Fatalities 227,898 2003 12 26 - Southeastern Iran - M 6.6Fatalities 31,000 2001 01 26 - Gujarat, India - M 7.6Fatalities 20,023 http://earthquake.usgs.gov/earthquakes/world/historical.php

  14. Next Class • History of earthquakes and recording • Assignment

  15. Assignment Explore one interesting point in the history of earthquakes Find the oldest event One page only Submit next week

More Related