Messa in sicurezza di edifici storici - apps.peer.berkeley.eduapps.peer.berkeley.edu/pdf/163110_Central_Italy_Earthquake.pdf · Messa in sicurezza di edifici storici October 31, 2016

POLITECNICO DI TORINO ‐ DISEG G. P. CIMELLARO

Gian Paolo CimellaroAssociate Professor

Politecnico di Torino, Italy

Messa in sicurezza di edifici storici

October 31, 2016


Outline Tectonic summary; Historical seismicity; Seismic sequence; Main event of October 30th, 2016 (Mw 6.5) Conclusion.


Tectonic summary

The Italian territory is located between African and Eurasia plate. The Apennines’ region was generated by the subduction of the Adria micro-plate (part of African plate) beneath Eurasia


Tectonic summary

Individual Seismogenic Source for the Central Apennins’ zone (INGV, 2016).


Historical seismicity

Historical Catalogue of strong earthquake from 1000 to 2016. (INGV, 2016)

Mw Number of earthquakes

6.0-6.9 12

>= 7.0 1


Seismic sequence

Seismic sequence in Central Italy from August 24 to October 30.INGV (2016)


Main event of October 30th, 2016 (Mw 6.5)

• Fault mechanism


Main event of October 30th, 2016 (ML 6.5)

Shakemap in the zone close to the epicenter for the main event of 6.5 ML

(INGV, 2016).



Recording stations

Epicenter:

Lat: 42.7925 N,

Long: 13.0965 E

(City of Norcia)



Station Location Re [km]

NRC Norcia 5.40

ACT Acquasanta Terme 25.90

T1201 Domo 23.30

FOC Colfiorito 27.10

Selected recording stations



0

100

200

300

400

500

ACT FOC T1201 NRC

225

371340

465

408

335

467

328

PGA [cm/s2]

PGA ‐ Horizontal Components

E‐W

N‐S

Horizontal peak ground accelerations



Vertical peak ground accelerations

0

100

200

300

400

ACT FOC T1201 NRC

229 219 228

352

PGA [cm/s2]

PGA ‐ Vertical Component

U‐D



0 50 100 150 200 250 300 350 400

ACT

FOC

T1201

NRC

123.3

164.72

222.62

244.73

INTENSITA' DI ARIAS [CM/S]

N‐S component

Horizontal components of Arias Intensity

0 50 100 150 200 250 300 350 400

ACT

FOC

T1201

NRC

65.87

226.34

90.63

363.55

INTENSITA' DI ARIAS [CM/S]

Ia componenti E‐W



0

250

500

750

1000

1250

1500

1750

2000

0 0.5 1 1.5 2 2.5 3 3.5 4

Sa(T) [m/s2]

Periodo [s]

SLC Acquasanta_EW

SLV Acquasanta_NS

Comparison between horizontal spectra and Design Code spectra (SLV and SLC)




0

250

500

750

1000

1250

1500

1750

2000

0 0.5 1 1.5 2 2.5 3 3.5 4

Sa(T) [m/s2]

Periodo [s]

SLC Foligno_EW

SLV Foligno_NS




0

250

500

750

1000

1250

1500

1750

2000

0 0.5 1 1.5 2 2.5 3 3.5 4

Sa(T) [m/s2]

Periodo [s]

SLC Domo_EW

SLV Domo_NS




0

250

500

750

1000

1250

1500

1750

2000

0 0.5 1 1.5 2 2.5 3 3.5 4

Sa(T) [m/s2]

Periodo [s]

SLC Norcia_EW

SLV Norcia_NS



0

100

200

300

400

500

0 10 20 30 40 50 60 70 80 90 100 110

PGA [cm/s2]

Distanza Epicentrale [Km]

PGA ATTENUATION

Recorded PGA Log. (Recorded PGA)

PGA attenuation



Comparison of the PGA attenuation

0

100

200

300

400

500

0 10 20 30 40 50 60 70 80 90 100 110

PGA [cm/s2]


Comparison of the PGA Attenuation

Regressione Log. Ambraseys 96 (Soft) Log. (Regressione Log.)



PGV attenuation

0

20

40

60

80

100

0 10 20 30 40 50 60 70 80 90 100 110

PGV [cm/s]


PGV Attenuation


CastelluccioTown general view


Castelluccio“soft story behavior”


CastelluccioOpen stirrups


Ancient city walls - Norcia


Incomplete shoring up interventionAncient city walls - Norcia


Monastery of Sant’Antonio -NorciaComplete shoring up intervention


Monastery of Sant’Antonio -NorciaComplete shoring up intervention

Documents

Messa in sicurezza di edifici storici - apps.peer.berkeley.eduapps.peer.berkeley.edu/pdf/163110_Central_Italy_Earthquake.pdf · Messa in sicurezza di edifici storici October 31, 2016