Response of tall buildings with symmetric setbacks under blast loading
Article
Article Title | Response of tall buildings with symmetric setbacks under blast loading |
---|---|
ERA Journal ID | 201178 |
Article Category | Article |
Authors | Jayatilake, I. N., Dias, W. P. S., Jayasinghe, M. T. R. and Thambiratnam, D. P. |
Journal Title | Journal of the National Science Foundation of Sri Lanka |
Journal Citation | 38 (2), pp. 115-123 |
Number of Pages | 9 |
Year | 2010 |
Publisher | National Science Foundation of Sri Lanka |
Place of Publication | Sri Lanka |
ISSN | 1391-4588 |
Digital Object Identifier (DOI) | https://doi.org/10.4038/jnsfsr.v38i2.2043 |
Web Address (URL) | https://jnsfsl.sljol.info/articles/abstract/10.4038/jnsfsr.v38i2.2043/ |
Abstract | This study explores three-dimensional nonlinear dynamic responses of typical tall buildings with and without setbacks under blast loading. These 20 storey reinforced concrete buildings have been designed for normal (dead, live and wind) loads. The influence of the setbacks on the lateral load response due to blasts in terms of peak deflections, accelerations, inter-storey drift and bending moments at critical locations (including hinge formation) were investigated. Structural response predictions were performed with a commercially available three-dimensional finite element analysis programme using non-linear direct integration time history analyses. Results obtained for buildings with different setbacks were compared and conclusions made. The comparisons revealed that buildings having setbacks that protect the tower part above the setback level from blast loading show considerably better response in terms of peak displacement and inter-storey drift, when compared to buildings without setbacks. Rotational accelerations were found to depend on the periods of the rotational modes. Abrupt changes in moments and shears are experienced near the levels of the setbacks. Typical twenty storey tall buildings with shear walls and frames that are designed for only normal loads perform reasonably well, without catastrophic collapse, when subjected to a blast that is equivalent to 500 kg TNT at a standoff distance of 10 m. |
Keywords | Blast loading; Dynamic analysis; Hinge formation; Setbacks; Tall buildings |
Public Notes | There are no files associated with this item. |
Byline Affiliations | University of Moratuwa, Sri Lanka |
Queensland University of Technology | |
Library Services |
https://research.usq.edu.au/item/wz4q3/response-of-tall-buildings-with-symmetric-setbacks-under-blast-loading
38
total views0
total downloads0
views this month0
downloads this month