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Structural engineering in Yopal

Structural design, review and technical supervision in a high seismic hazard zone.

Photo: Josué Isaí Ramos Figueroa / Unsplash

DDES provides structural design, independent design review, technical supervision and construction oversight (interventoría) for projects in Yopal, Casanare, under the NSR-10 (Colombia's seismic-resistant building code) and Law 1796 of 2016. Yopal is in the high seismic hazard zone, with Aa = 0.30 and Av = 0.20. Casanare is one of the departments where DDES has worked.

Seismic hazard
High
Aa / Av
0.30 / 0.20
Ae / Ad
0.15 / 0.06
Department
Casanare

What does the NSR-10 require to build in Yopal?

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.

If the geotechnical study gives a type D profile, the Yopal design spectrum for a residential or office building (occupancy group I) has a plateau of Sa = 0.90 g up to TC = 0.53 s, and TL = 4.80 s. With another soil or another use the values change: work them out with the design spectrum.

What does the high hazard zone require in Yopal?

Yopal has Aa = 0.30 and Av = 0.20: high seismic hazard, with an acceleration coefficient three times that of Barranquilla. In reinforced concrete, the NSR-10 only accepts systems with special energy dissipation capacity (DES) there, with the most demanding detailing in the code: confinement of columns, joints and walls.

What does it mean for the project?

More confinement steel and sections that control the drifts, which may not exceed 1 % of the story height in concrete and steel structures (A.6.4.1). Technical supervision is mandatory for occupancy groups III and IV whatever the area (A.1.3.9.1), and for the rest when the lot allows more than 2,000 m² (Law 1796).

When does Law 1796 require review and technical supervision in Yopal?

The rule is the same throughout the country: when the lot allows more than 2,000 m² to be built, whatever the use, Law 1796 of 2016 requires an independent review of the structural designs before the permit and independent technical supervision during construction. Buildings in occupancy groups III and IV, such as schools and hospitals, require technical supervision whatever the area (A.1.3.9.1). Check your case with the Law 1796 assistant.

Frequently asked questions

What seismic hazard zone is Yopal in?

In the high seismic hazard zone, with Aa = 0.30 and Av = 0.20 according to Appendix A-4 of the NSR-10.

Does DDES work in Yopal?

Yes. DDES works from its office in Barranquilla across Colombia and has done projects in Casanare. For a proposal, send the architectural drawings and the location of the lot through the contact form or on WhatsApp.

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Photo: Julia Taubitz / Unsplash