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http://dx.doi.org/10.12989/sem.2011.40.1.065

A simple mathematical model for static analysis of tall buildings with two outrigger-belt truss systems  

Rahgozar, Reza (Department of Civil Engineering, Shahid Bahonar University of Kerman)
Ahmadi, Ali Reza (Department of Civil and Mechanical Engineering, International Center for Science and High Technology)
Hosseini, Omid (Department of Civil Engineering, Shahid Bahonar University of Kerman)
Malekinejad, Mohsen (Department of Civil Engineering, Shahid Bahonar University of Kerman)
Publication Information
Structural Engineering and Mechanics / v.40, no.1, 2011 , pp. 65-84 More about this Journal
Abstract
In this paper a simple mathematical model for approximate static analysis of combined system of framed tube, shear core and two outrigger-belt truss structures subjected to lateral loads is presented. In the proposed methodology, framed tube is modeled as a cantilevered beam with a box section and interaction between shear core and outrigger-belt truss system with framed tube is modeled using torsional springs placed at location of outrigger-belt truss; these torsional springs act in a direction opposite to rotation generated by lateral loads. The effect of shear lag on axial deformation in flange is quadratic and in web it is a cubic function of geometry. Here the total energy of the combined system is minimized with respect to lateral deflection and rotation in plane section. Solution of the resulting equilibrium equations yields the unknown coefficients of shear lag along with the stress and displacement distributions. The results of a numerical example, 50 storey building subjected to three different types of lateral loading obtained from SAP2000 are compared to those of the proposed method and the differences are found to be reasonable. The proposed method can be used during the preliminary design stages of a tall building and can provide a better understanding of the effects of various parameters on the overall structural behavior.
Keywords
tall building; framed tube; shear core; outrigger-belt truss; shear lag; static analysis;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
Times Cited By Web Of Science : 2  (Related Records In Web of Science)
Times Cited By SCOPUS : 3
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