Building survey in Gandhinagar & Ahmedabad city (developing vulnerability hazard map)Guided by :

Dr. V.M. Patel(Principal, S.V.B.I.T.)

Ms. Vidhi Patel (Asst. Professor, S.V.B.I.T.)Presented by :

Abhi GandhiAkash Solanki Russi Modi Sagar Patel Shalin Shah Yash MehtaPratik PatelAjay PatelKaushik NadodaParas Bhavsar

Department of Civil EngineeringShankarsinh Vaghela Bapu Institute of TechnologyVasan Gandhinagar382650

(110750106029)(110750106061)(110750106055)(120753106009)(110750106023)(110750106027)(110750106012)(110750106021)(120753106010)(120753106007)

ContentAbstractIntroductionResearch problemObjectiveMethodologySurvey sheetRemaining WorkReferences*

AbstractThe Gujarat region is one of the most seismic prone intra-continental regions of the world. All the four seismic zones V, IV, III and II defined in seismic zoning map of India falls in the Gujarat state and adjoining region (IS 1893:2002). This region has witnessed many destructive earthquakes in the past and in recent times. Gandhinagar & Ahmedabad cities lie in zone 3 as represented on the Seismic Zoning Map of India (IS 1893:2002). In 2001 Bhuj Earthquake, a lot of damage occurred in nearby areas of Gandhinagar zone. The enhanced seismicity in the region warrants assessment of seismic hazard to aid engineers in urban development. Due to expansion and increase in the number of multi-storey buildings & important engineering structures, population is increasing day by day in the proposed cities of Gujarat state. A major earthquake close to any such major cities can actually cause not only a large number of causalities but also an economic collapse. Our results will be validated with the help of available bore-hole, geological and civil engineering data. So by developing seismic hazard vulnerability map of Gandhinagar & Ahmedabad we can help minimize damage in structures of this area.*

GUJARAT has experienced great earthquakes in the past, the last being on 26th January 2001 that had its epicenter in Bhuj region. The Bhuj earthquake (Mw 7.7) was one of the most destructive earthquakes of India, killing about 20,000 people and injuring many more.[1]The earthquake caused severe damage not only in the epicentral region, but spread over 350 km, including major cities like Ahmedabad, Bhuj, Rajkot, Anjar, Gandhidham, Morbi and Surendranagar. Many multistorey buildings collapsed in Ahmedabad city, which is located at a distance of 225 km from the location of the epicentral region, during the 2001 Bhuj earthquake.The whole of Gujarat region is prone to earthquake hazard of different levels from moderate to high, assigned as zones IIV in the seismic zoning map of India (IS 1893:2002). Gandhinagar area lies in zone III where an earthquake of magnitude 6 can be expected, which can damage single or multistorey buildings. Medium to high seismic risk exist in Gandhinagar area from the local and regional strong earthquakes.Thus, there is a need for site characterization and seismic vulnerability hazard mapping of the area.Introduction*

Current seismic zoning map of GujaratSource : http://isr.gujarat.gov.in/seismic_zoning_gujarat.php*

The Rapid Visual Screening method is designed to be implemented without performing any structural calculations. The procedure utilizes a damageability grading system that requires the evaluator to identify the primary structural load-resisting system of the structure, and identify building attributes that modify the seismic performance expected for this load-resisting system along with non-structural components. The inspection, data collection and decision-making process typically occurs at the building site, and is expected to take couple of hours for a building, depending on its size. Rapid Visual Survey*

Gandhinagar & Ahmedabad cities lies in zone 3 as represented on the Seismic Zoning Map of India (IS 1893:2002). In 2001 Bhuj Earthquake, a lot of damage occurred in and surrounding areas of Ahmedabad due to lack of knowledge of soil strata and soil behavior during Earthquake. A lot of lives were lost during that earthquake. Even after such a devastation in these areas, construction practices & inspection are still lacking proper attention. If some preventive steps are not taken immediately, an earthquake in the near future will bring with it destruction similar to that of 2001.Research Problem*

To develop vulnerability hazard map of selected areas of Ahmedabad and Gandhinagar Cities using RVS.

Objective*

Methodology*

Research papers considered while selecting Rapid Visual Survey Sheet for Indian ConditionRapid Visual Screening of Buildings for Potential Seismic Hazards A Handbook, FEMA 154Rapid Visual Screening of RCC & Masonry Buildings, Dr. Anand S. Arya A National Policy for Seismic Vulnerability Assessment of Buildings and Procedure for Rapid Visual Screening of Buildings for Potential Seismic Vulnerability, Prof. Ravi Sinha and Prof. Alok GoyalA Proposed Rapid Visual Screening Procedure for Seismic Evaluation of RC-Frame Buildings in India, Sudhir K. Jain, Keya Mitra, Manish Kumar and Mehul ShahdEarthquake Vulnerability Assessment of Existing Buildings in Gandhidham and Adipur Cities Kachchh, Gujarat (India), Terala Srikanth, Ramancharla Pradeep Kumar, Ajay Pratap Singh, Bal Krishna Rastogi, Santosh Kumar*

*Survey Sheet

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Satellite view of the Study Area in Gandhinagar as on 5-6-2002Source :Google Earth*

Satellite view of the Study Area in Gandhinagar as on 1-3-2015Source :Google Earth*

Adarshnagar Society, Sector 24Satellite view of the Study Area in Gandhinagar as on 3-7-2014Source :Google Earth*

*Satellite view of the Study Area in Ahmedabad as on 27-1-2001Source :Google Earth

*Satellite view of the Study Area in Ahmedabad as on 1-3-2015Source :Google Earth

Detailed Survey of proposed Areas of the defined CitiesData AnalysisDevelop Vulnerability Map

Remaining Work*

References[1]B. Sairam, B. K. Rastogi, Sandeep Aggarwal, Mukesh Chauhan and Uday Bhonde, Seismic site characterization using Vs30 and site amplification in Gandhinagar region, Gujarat, India, CURRENT SCIENCE, VOL. 100, NO. 5, 10 MARCH 2011Rapid Visual Screening of Buildings for Potential Seismic Hazards A Handbook, FEMA 154IS 1893 : 2002 A National Policy for Seismic Vulnerability Assessment of Buildings and Procedure for Rapid Visual Screening of Buildings for Potential Seismic Vulnerability, Prof. Ravi Sinha and Prof. Alok Goyal, Department of Civil Engineering, IIT Bombayhttp://isr.gujarat.gov.in/seismic_zoning_gujarat.phpGoogle Earth

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*Thank You

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