Shear lag behaviour and dynamic characteristic of a tube-in-tube building

Pao Yue-kong Library Electronic Theses Database

Shear lag behaviour and dynamic characteristic of a tube-in-tube building


Author: Ng, Shui-ting Tony
Title: Shear lag behaviour and dynamic characteristic of a tube-in-tube building
Degree: M.Sc.
Year: 1994
Subject: Tall buildings -- Aerodynamics
Shear (Mechanics)
Hong Kong Polytechnic -- Dissertations
Department: Multi-disciplinary Studies
Pages: iii, 76 leaves : ill. ; 30 cm
Language: English
InnoPac Record:
Abstract: Tube-in-tube system is one of the most common structural system for high-rise buildings. The stiffness of an exterior hollow tube is very much improved by amalgamating the exterior core which responds as a unit to take lateral forces. However, there are not many references which discuss the shear lag behaviour of a tube-in-tube structure. One of the references is by F.R. Khan [4] who had carried out a simplified analytical method in studying the shear lag effect of a frame tube structure. This dissertation aims at analyzing the shear lag behaviour of a tube-in-tube structure on different structural configurations, spandrel beam sizes, and inner core sizes by using a more precise 3-dimensional finite element package. The results show that shear lag effect will be minimized with (i) aspect ratio equals to one; (ii) high stiffness spandrel beams and floor beams and (iii) enlargement of corner columns sizes. Further, the present study generates the design charts for the estimation of structural members sizes in the preliminary design stage. In addition to the above, the dynamic characteristic of the building is also studied. The first 6 modes of the tube-in-tube structure are computed and its vibration shapes are also depicted in Appendix A. Suggestions in improving the structure against vibration are also given.

Files in this item

Files Size Format
b11830256.pdf 2.878Mb PDF
Copyright Undertaking
As a bona fide Library user, I declare that:
  1. I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
  2. I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
  3. I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.


Quick Search


More Information