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Armenian National Survey for Seismic Protection

Armenian National Survey for Seismic Protection. Earthquake Engineering Center. www.nssp-gov.am e-mail kh.zaven@nssp.gov-am zkhlghatyan@yahoo.com. Tasks of Earthquake Engineering Center.

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Armenian National Survey for Seismic Protection

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  1. Armenian National Survey for Seismic Protection Earthquake Engineering Center www.nssp-gov.ame-mail kh.zaven@nssp.gov-am zkhlghatyan@yahoo.com

  2. Tasks ofEarthquake Engineering Center Realization the Initiative and Strategy of Armenian NSSP in building and structure seismic protection (in the frame of State Complex Programs on Seismic risk reduction in the territory of Armenia and city of Yerevan). Seismic risk evaluation and mapping for towns and settlements in Armenia. Rapid damage estimation of structures and buildings in epicentral zone in case of major earthquake.

  3. Vulnerability assessment for critical facilities (NPP, chemical plants, dams and reservoirs, and lifelines. • Elaboration, testing and implementation of techniques and procedures for reinforcement and retrofitting of existing buildings and structures. • Development of experimental models and research aiming at strengthening of buildings and structures. • Seismic monitoring of buildings and structures through installation and operation strong motion instruments. • Research on ground strong motion. 9. Development and implementation of Early Warning System.

  4. Structure of Earthquake Engineering Center • Building and Structure Seismic Risk Evaluation Division • Critical Facilities Seismic Vulnerability Assessment Division • Experimental Research Division • Seismically Protective Constructive Systems and New Constructive Solution Division 5. Ground Strong Motion and Building Monitoring Division

  5. Tasks of Building and Structure Seismic Risk Evaluation Division • Data base creation for urban planning of towns and settlements using GIS technology • Urban planning detailed mapping • Estimation of facilities’ design seismic resistance • Seismic risk evaluation for towns and settlements • Seismic risk mapping for towns and settlements • Rapid damage estimation for towns and settlements in epicentral zone in case of major earthquake.

  6. Geological map in Armenia

  7. Distribution pattern for the seismic risk in Armenia

  8. Seismic Risk in Yerevan City

  9. Seismic Microzonation Map of Yerevan City 0.32g 0.40g 0.38g

  10. SEISMIC RISK DISTRIBUTION FOR YEREVAN CITY High Moderate Low

  11. high risk (K>1.1) moderate risk (1.05<K<1.1) no risk practically (K<1.06) • Low-rise stone buildings (private) • Mixed stone-complex construction buildings • Large panel buildings • Frame panel buildings • Buildings constructed with story grown-up method • Braced buildings Map of the risk collapse for different construction type buildings in Yerevan city (design types 1,2,…, are indicated in percentage of total number of buildings in each square 1,2,…)

  12. Capital buildings 0.1g Capital buildings 0.2g Private buildings

  13. Tasks of Critical Facilities Seismic Vulnerability Assessment Division • Data base creation for most earthquake vulnerable buildings in towns and settlements • Vulnerability assessment for critical facilities (NPP, chemical plants, dams and reservoirs, and lifelines) • Engineering research in construction aiming at compliance of new methodology and seismic building codes

  14. In situ estimation of expected ground maximum acceleration • In situ estimation of ground and structure prevailing periods • In situ creation of design accelerograms • Definition of technical condition and actual seismic resistance for facilities, development of methods for vulnerability reduction • Rapid damage estimation for towns and settlements in epicentral zone in case of major earthquake • Building and structure behavior study in case of major earthquake • Analysis of earthquake consequences

  15. Borders of adjacent areas to Azat reservoir in case of possible flooding

  16. THE ESTIMATION OF BUILDING ’S VULNERABILITY By the constructive decisions residential buildings in Armenia are divided into six categories 1. stone buildings (less than 5 story ) 2. large-panel buildings (9 story ) 3. frame-panel buildings (9 story ) 4. frame and frame-braced (12-16 story ) 5. constructed by floor-grade method (12-16 story) 6. new structural design (less than 9 story )

  17. STONE BUILDINGS (less than 5 story ) 30% of dwelling fund High vulnerability Strengthening required

  18. Natural vibration of Stone (Mansory) five-storied building Fourier spectra

  19. The prevailing period in the transverse direction of the building is 0.38 sec. Obtained value is 1.36 times more than normative prevailing period. According to the Codes of Armenia such increase of the normative prevailing period corresponds to the third degree of damage, which requires Rehabilitation and reinforcement of the building.

  20. LARGE-PANEL BUILDINGS (9 story) 10% of dwelling fund Low vulnerability

  21. FRAME-PANEL BUILDINGS (9 story) 15% of dwelling fund High vulnerability, 95 from 138 of 9-storey frame panel buildings of 111 series were totally collapsed in Gyumri After Spitak Earthquake buildings will not erected more Strengthening required

  22. FRAME AND FRAME-BRACED (12-16 story) 15% of dwelling fund Not existed in disaster zone Low vulnerability

  23. CONSTRUCTED BY FLOOR-GRADE METHOD (12-16 story) Mostly in Yerevan-city 7% of dwelling fund 2 buildings collapsed in Gyumri After Spitak Earthquake buildings will not erected more.

  24. Tasks of Seismically Protective Constructive Systems and New Constructive Solution Division • Analysis of constructive solutions for existing buildings and development of new conceptual solutions for seismic resistance • Analysis of constructive solutions for retrofitted buildings in disaster zone and development of new solutions

  25. Estimation of seismic loads for buildings and structures using accelerograms of real earthquakes • Development and implementation of new technologies for strengthening of buildings and structures • Development and implementation of damper equipment for building and structure seismic resistance increase • Theoretical and practical research on shim-rubber isolation • Monitoring of buildings using seismic protective systems

  26. Model of 9-story frame building with “upper flexible floor”

  27. General view of a building with “upper flexible floor”

  28. Upper flexible flooron LRB

  29. Using the seismic insulators for the buildings and constructions

  30. Armenian International Airport.Moment of Experiment of Lead Rubber Bearing (Kuala-Lumpur, Robinson Seismic Ltd)

  31. Building before restoration

  32. Constructive solutions

  33. Building after restoration

  34. Tasks of ExperimentalResearch Division • Development and implementation of new building strengthening technologies • Development of experimental models and research aiming at strengthening of buildings and structures • Experimental research on shim-rubber isolation • Experimental selection of appropriate damper equipment for building and structure seismic resistance increase • Testing of building materials and constructions

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