Seismic Damage of R/C Frame Structures in Ms8.0 Wenchuan Earthquake

Abstract eng:
All materials of this paper derive from the author’s 80 days field investigation of the Great Ms8.0 Wenchuan Earthquake. R/C frame building structures have been suffered different kinds and different levels damage in different affected areas of Ms8.0 Wenchuan Earthquake. R/C frame structure is one of the major types of building structure in Sichuan area. All existing R/C frame structures are constructed in 3 stages: before 1990, during 1990 and 2001, and after 2001. These buildings shows different damage patterns in earthquake such as masonry infill wall damage only, beam-end with infill wall damage, column-end with infill wall damage, bottom story damage, mid-story damage even total collapse. It discloses almost all drawbacks of the structural design, construction and management. This paper summarizes 5 kinds of damage patterns together with the damage cause analyses of R/C frame structures. Results shows that infill wall contributes much to the seismic capacity of the R/C buildings, the pattern of column-end with infill wall damage usually caused by wrong design concept, the pattern of mid-story damage mostly are caused by the story stiffness change in corresponding story, and so on. The author hopes that this paper can provide some useful information for both of design and construction of future R/C frame buildings during reconstruction of Ms8.0 Wenchuan earthquake.

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