collapse of a confined masonry building due to the soft storey effect
August 2007, Pisco, Peru earthquake, a six-storey confined masonry building remained undamaged
In general, confined masonry buildings performed well in past Peruvian earthquakes (Gallegos, 1994). Poor performance was observed in geographic locations with poor soil conditions.
In the 1970 Chimbote earthquake (magnitude 7.8), extensive damage was recorded when wall-to-floor connection were inadequate (Schultz, 1994). Confined masonry construction was widely used in urban areas located close to the epicenter of the August 2007 Pisco earthquake (magnitude 8.0) (EERI, 2007). In general, confined masonry buildings performed very well in the earthquake. However, confined masonry buildings with irregularities or poor detailing of reinforcement suffered extensive damage.
Guidelines, Codes, and Standards
Click here to see more about Peru codes and standards
- Construction and Maintenance of Masonry Houses
- Chapter 4: Confined Masonry Housing (in Spanish)
- Construction Procedures (in Spanish)
- Peru Code (10MB zipped file)
World Housing Encyclopedia Reports:
Report # 50 : Confined masonry building
Report # 51 : Confined masonry houses
- Development of Confined Masonry Seismic Considerations, Research and Design Codes in Peru, Daniel Quiun, P. Santillan, Paper #2883
From Brzev, Svetlana. Earthquake-Resistant Confined Masonry Construction. 2nd ed. Kanpur: NICEE, 2007. Print.
Schultz, A. E. (1994). Performance of Masonry Structures During Extreme Lateral Loading Events. Masonry in the Americas, ACI Publication SP-l47, American Concrete Institute, Detroit,