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Investigating the seismic behaviour of Split-Level building structures

Khonsari, S. V ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. Publisher: 2010
  3. Abstract:
  4. The history of the building structures damaged during previous earthquakes reveal that one of the causes of these damages was the existence of some sort of irregularity in the structure of these buildings. In this work, the effects of irregularities due to the split in the levels of various parts of some 2D steel structures (Split Level) on their seismic behaviour are studied. The studied frames consist of five-, ten- and fifteen-storey frames, each with 0, 30, 60, 90, 120, and 150 cm split between the storey levels of the two parts (sides) of the building. The modal analysis of these frames showed that a high percentage of their base shear is transferred to the foundation through the upper-level columns and therefore the lower-level columns have little contribution to this process. Moreover, the comparison between the internal forces and the displacements of these frames obtained through the two methods of analysis, viz "modal analysis" and "static analysis" using the proposed method for working out the equivalent static loads, show a fair degree of correlation between their results. Thus, within the context of studied frames, it can be concluded that instead of dynamic (modal) analysis, one can carry out a static analysis using the method of distribution for the equivalent static loads developed and proposed in this paper
  5. Keywords:
  6. Base shear ; Building structure ; Degree of correlations ; Equivalent static loads ; Internal forces ; Methods of analysis ; Seismic behaviour ; Civil engineering ; Modal analysis ; Static analysis ; Tsunamis ; Engineering geology
  7. Source: 9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium, 25 July 2010 through 29 July 2010, Toronto, ON ; Volume 2 , 2010 , Pages 1437-1446 ; 9781617388446 (ISBN)