Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Evaluation of Two RC Buildings Retrofit with Steel Bracing
Experimental and analytical studies were conducted to assess the contributions of two retrofit schemes to the performances of two RC buildings during the 1985 Mexico earthquake. The schemes used to strengthen the two buildings were similar in that diagonal steel braces and RC infill walls were used to stiffen and strengthen the existing RC frames. The schemes were different in that one had steel bracing in the interior of the building while the other had steel bracing on the exterior of the building. The evaluations of the retrofit schemes considered a variety of data including: (1) observations on earthquake damage from the 1979 Mexico earthquake, which occurred before the retrofit schemes were implemented; (2) ambient vibration measurements before and after retrofit; (3) observations on earthquake damage from the 1985 Mexico earthquake; (4) forced vibration tests after the 1985 earthquake; and (5) analytical studies using various models of the buildings based upon the building plans and other observations. The results of the studies indicate that the additional stiffness and strength provided by the retrofit elements were essential to the survival of the two buildings during the 1985 earthquake, that the effects of soil-structure interaction must be considered when designing retrofit systems for soft soil sites, and that connections play an important role in determining the effectiveness of the retrofit elements.
Evaluation of Two RC Buildings Retrofit with Steel Bracing
Experimental and analytical studies were conducted to assess the contributions of two retrofit schemes to the performances of two RC buildings during the 1985 Mexico earthquake. The schemes used to strengthen the two buildings were similar in that diagonal steel braces and RC infill walls were used to stiffen and strengthen the existing RC frames. The schemes were different in that one had steel bracing in the interior of the building while the other had steel bracing on the exterior of the building. The evaluations of the retrofit schemes considered a variety of data including: (1) observations on earthquake damage from the 1979 Mexico earthquake, which occurred before the retrofit schemes were implemented; (2) ambient vibration measurements before and after retrofit; (3) observations on earthquake damage from the 1985 Mexico earthquake; (4) forced vibration tests after the 1985 earthquake; and (5) analytical studies using various models of the buildings based upon the building plans and other observations. The results of the studies indicate that the additional stiffness and strength provided by the retrofit elements were essential to the survival of the two buildings during the 1985 earthquake, that the effects of soil-structure interaction must be considered when designing retrofit systems for soft soil sites, and that connections play an important role in determining the effectiveness of the retrofit elements.
Evaluation of Two RC Buildings Retrofit with Steel Bracing
R. E. Downs (Autor:in) / K. D. Hjelmstad (Autor:in) / D. A. Foutch (Autor:in)
1991
355 pages
Report
Keine Angabe
Englisch
Construction Materials, Components, & Equipment , Structural Analyses , Reinforcement(Structures) , Reinforced concrete , Earthquake damage , Buildings , Reinforcing materials , Earthquake engineering , Structural vibration , Soil-structure interactions , Mexico , Retrofitting , Reinforcing steels , Earthquake resistant structures , Structural analysis , Finite element method , Computer programs , Concrete structures , Dynamic response
Wind bracing in steel buildings
Engineering Index Backfile | 1940
Wind bracing in steel buildings
Engineering Index Backfile | 1933
Wind-bracing in steel buildings
Engineering Index Backfile | 1933
Wind-bracing in steel buildings
Engineering Index Backfile | 1936