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Preliminary damage survey Preliminary damage survey after Gorkha Earthquake after Gorkha Earthquake (Nepal 2015) (Nepal 2015) Ph.D. , S.E. Devis Sonda IABSE – WG7 workshop – Geneva 25.09.2015

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Page 1: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake

(Nepal 2015)(Nepal 2015)

Ph.D. , S.E. Devis Sonda

IABSE – WG7 workshop – Geneva 25.09.2015

Page 2: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

The EarthquakeOn April 25 a 7.8 magnitudeearthquake, located 81

May 12

km northwest of Kathmandu

O M 12 dOn May 12, a second 7.3 magnitude earthquake, located northest of Kathmandunorthest of Kathmandu

Powerful aftershocks continued includingcontinued, including 5.6 and 6.3 magnitude.

IABSE – WG7 workshop – Geneva 25.09.2015

Page 3: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

The Earthquake

The number of reported d thdeaths was more than 6 2006.200

IABSE – WG7 workshop – Geneva 25.09.2015

Page 4: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

The Earthquake

Time histories recorded in Kathmandu(April 25)

PGA ≈ 0.17g

IABSE – WG7 workshop – Geneva 25.09.2015

Page 5: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

The Earthquake

Recorded Spectra(A il 25)(April 25)

IABSE – WG7 workshop – Geneva 25.09.2015

Page 6: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

Kathmandu valley

IABSE – WG7 workshop – Geneva 25.09.2015

Page 7: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

High-rise buildings

IABSE – WG7 workshop – Geneva 25.09.2015

Page 8: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

Mid-rise buildings

IABSE – WG7 workshop – Geneva 25.09.2015

Page 9: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

Low-rise buildings

IABSE – WG7 workshop – Geneva 25.09.2015

Page 10: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

Wall fences

IABSE – WG7 workshop – Geneva 25.09.2015

Page 11: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

Monasteries and temples

IABSE – WG7 workshop – Geneva 25.09.2015

Page 12: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

Non-Engineered StructuresNon Engineered Structures

Historic Buildingsgin Kathmandu

IABSE – WG7 workshop – Geneva 25.09.2015

Page 13: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

Durbar Square Kathmandu

IABSE – WG7 workshop – Geneva 25.09.2015

Page 14: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

The Maju Deval Temple

Built in 1690

IABSE – WG7 workshop – Geneva 25.09.2015

Page 15: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

Basantapur TowerBasantapur Tower

IABSE – WG7 workshop – Geneva 25.09.2015

Page 16: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

King Pratap Malla Statue

IABSE – WG7 workshop – Geneva 25.09.2015

Page 17: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

Multiple wythe masonry

IABSE – WG7 workshop – Geneva 25.09.2015

Page 18: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

Non-Engineered StructuresNon Engineered Structures

Unreinforced Masonry Buildingsy gin villages

IABSE – WG7 workshop – Geneva 25.09.2015

Page 19: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

Sunkhun Village

IABSE – WG7 workshop – Geneva 25.09.2015

Page 20: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

Typical building elements

IABSE – WG7 workshop – Geneva 25.09.2015

Page 21: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

Sakwo Village

IABSE – WG7 workshop – Geneva 25.09.2015

Page 22: Preliminary damage surveyPreliminary damage … Earthquake/Devis...Preliminary damage surveyPreliminary damage survey after Gorkha Earthquakeafter Gorkha Earthquake (Nepal 2015)(Nepal

Wall thikness

IABSE – WG7 workshop – Geneva 25.09.2015


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