Approximate Analysis of Three-Dimensional Tall Building Structures

[摘要] Simplified approximate methods are presented in this thesis for the analysis of three-dimensional tall building structures subjected to lateral loads. The structures considered may consist of parallel uniform high-rise bents such as planar rigid frames, plane shear walls, coupled shear walls and structural cores. The intention is to establish generalized rapid hand methods which are suitable for the structural analysis in the early design stages, and which can be used as overall checking guides for more sophisticated methods such as finite element analysis. Based on the continuum technique, studies are made to investigate the modes of load-deformation behaviour of individual assemblies, and analyses are presented for the interactions between wall-frame assemblies and coupled shear wall structures. Inspections show that these different structural bents can be classified as a general family of cantilevers, and a revised wall-frame method is presented to characterize the mode of lateral load-deformation behaviour of such assemblies. On using the revised wall-frame method and a spring supported rigid beam model, a generalized method is presented for the analysis of complete three-dimensional wall-frame structures subjected to bending and torsion actions. Solutions can be obtained from formulae-based calculations based on several representative structural parameters. An area influence coefficient method is presented for the analysis of three-dimensional tall building structures subjected bending to and torsion. The interaction forces between different assemblies in a structure are assumed to be represented sufficiently accurately by a combination of three load components. Having determined the modes of force-deformation behaviour of individual assemblies, the horizontal compatibility conditions are achieved by means of equating the top deflections, the areas under the deflected diagrams, and the first moments of areas about the base of the deflected diagrams. Used in conjunction with the horizontal force equilibrium conditions, sufficient equations are obtained to solve for the force distributions on the assemblies. The simplicity of the structure of the equations makes it possible to achieve a solution by a hand calculation, using a pocket calculator. A number of numerical examples are carried out using the methods presented. The accuracy and the validity of the methods are assessed by comparing the results with those obtained from a finite element analysis.

[发布机构] University:University of Glasgow

[关键词] Civil engineering