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Seismic hazard

Seismic hazard in Huila

Aa, Av, Ae and Ad for its 37 municipalities under the NSR-10.

Photo: Josué Isaí Ramos Figueroa / Unsplash

According to Appendix A-4 of the NSR-10, of the 37 municipalities of Huila, all are in the high seismic hazard zone. The capital, Neiva, has Aa = 0.25 and Av = 0.25, high hazard. Across the department, Aa ranges from 0.25 to 0.30 and Av from 0.15 to 0.25.

Municipalities
37
Capital
Neiva
Aa / Av of the capital
0.25 / 0.25
High hazard
37
Intermediate hazard
0
Low hazard
0

Municipalities of Huila

Values from Appendix A-4 of the NSR-10. Tap a municipality to open its design spectrum.

Source: NSR-10, Title A, Appendix A-4. Zone according to A.2.3.
MunicipalityCodeAaAvZoneAeAd
Neiva410010.250.25High0.200.08
Acevedo410060.300.15High0.170.06
Agrado410130.300.15High0.260.08
Aipe410160.250.25High0.140.05
Algeciras410200.300.20High0.200.08
Altamira410260.300.15High0.200.08
Baraya410780.300.25High0.190.08
Campoalegre411320.300.20High0.200.08
Colombia412060.300.25High0.190.08
Elías412440.300.15High0.200.08
Garzón412980.300.15High0.200.07
Gigante413060.300.15High0.200.08
Guadalupe413190.300.15High0.160.06
Hobo413490.300.20High0.200.08
Iquira413570.250.20High0.160.06
Isnos413590.250.20High0.190.07
La Argentina413780.250.15High0.190.07
La Plata413960.250.15High0.190.07
Nátaga414830.250.20High0.190.07
Oporapa415030.300.15High0.200.08
Paicol415180.250.20High0.200.08
Palermo415240.250.25High0.180.07
Palestina415300.300.20High0.200.08
Pital415480.300.15High0.200.08
Pitalito415510.300.15High0.200.08
Rivera416150.300.20High0.200.08
Saladoblanco416600.250.20High0.200.07
San Agustín416680.250.20High0.190.08
Santa María416760.250.20High0.140.05
Suazá417700.300.15High0.160.06
Tarquí417910.300.15High0.200.08
Tello417990.300.25High0.190.08
Teruel418010.250.20High0.190.07
Tesalia417970.250.20High0.190.07
Timaná418070.300.15High0.200.08
Villavieja418720.250.25High0.190.07
Yaguará418850.250.20High0.190.08

What does it mean for design in Huila?

Municipalities in the high hazard zone. In reinforced concrete, the NSR-10 only accepts systems with special energy dissipation capacity (DES) in the high hazard zone, the most demanding detailing in the code: confinement of columns and joints, and strict drift control.

The municipality's value is only the starting point: the soil profile sets the coefficients Fa and Fv, and the occupancy group sets the importance factor. Work out the full spectrum with the NSR-10 design spectrum, or look up another municipality in the seismic hazard tool.

What the code requires in Neiva, with each city's soil and environment, is on its structural engineering page.

Frequently asked questions

What seismic hazard zone is Neiva in?

In the high seismic hazard zone: Aa = 0.25 and Av = 0.25, according to Appendix A-4 of the NSR-10.

Which municipalities of Huila have the highest seismic hazard?

The department's highest coefficient, 0.30, is found in 21 municipalities, including Acevedo, Agrado, Algeciras, Altamira, Baraya and Campoalegre.

How many municipalities of Huila are in each seismic hazard zone?

Of 37 municipalities, 37 are in the high hazard zone, 0 in the intermediate zone and 0 in the low zone (NSR-10, Appendix A-4).

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