QUT ePrints

Response of tall buildings with symmetric setbacks under blast loading

Jayatilake, I.N. , Dias, W.P.S. , Jayasinghe, M.T.R., & Thambiratnam, D.P. (2010) Response of tall buildings with symmetric setbacks under blast loading. Journal of the National Science Foundation of Sri Lanka, 38(2), pp. 115-123.

[img] pending for publisher permission (PDF 865kB)
Published Version.
Administrators only | Request a copy from author

    View at publisher

    Abstract

    This study explores three-dimensional nonlineardynamic 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 have setbacks that protect the tower part above the setback level from blast loading show considerably better response in terms of peak displacement and interstorey 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 normaln 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.

    Impact and interest:

    0 citations in Scopus
    Search Google Scholar™
    0 citations in Web of Science®

    Citation countsare sourced monthly from Scopus and Web of Science® citation databases.

    These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

    Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

    ID Code: 39111
    Item Type: Journal Article
    Keywords: Blast Loading, Dynamic Analysis, Hinge Formation, Setbacks, Tall Buildings
    DOI: 10.4038/jnsfsr.v38i2.2043
    ISSN: 1391-4588
    Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
    Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
    Past > Schools > School of Urban Development
    Copyright Owner: Copyright 2010 Journal of National Science Foundation of Sri Lanka
    Deposited On: 10 Dec 2010 08:39
    Last Modified: 11 Aug 2011 00:56

    Export: EndNote | Dublin Core | BibTeX

    Repository Staff Only: item control page