| Author | Han, Peng Siew |
| Call Number | AIT Thesis no. ST-80-08 |
| Subject(s) | Structural frames--Mathematical models
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of master of engineering, school of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | A three dimensional analysis of framed tube structures using the finite strip formulation is attempted here. The method involves transforming the discrete structure into an elastically equivalent orthotropic tube. Standard finite element procedures have been employed to evaluate the stiffness matrix
and the load vector. Uncoupling of the different harmonics in the stiffness matrix is achieved by choosing an appropriate displacement function and by
invoking the assumptions of negligible out-of-plane deformations, rigid in plane floor slabs and uniform framed panel properties along the height of
the building. To assess the accuracy of the proposed formulation, two un perforated tubes were solved. The results were found to be in good agreement with finite element solutions with the exception of the shear stresses in the web. As an application of the proposed method, a 30-story framed
tube under torsional loading was analyzed. Solutions from a standard three dimensional frame computer program were used as the basis of comparison.
The maximum error in the angle of twist prediction was 2.2% at the top story. The overall stiffness and the axial forces in the corner columns were predicted with good accuracy. For the lower and upper stories, the agreement was poorer. This is due mainly to two reasons, namely, the use of a finite number of harmonics in the analysis and the assumption that the points of contra flexure occur at the mid-span of the columns. Nevertheless the proposed formulation is cheap, easy to be implemented on a small or even a minicomputer and should be very valuable in the preliminary design. |
| Year | 1980 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Worsak Kanok-Nukulchai ;Panitan Lukkunaprasit |
| Examination Committee(s) | Karasudhi, Pisidhi
|
| Scholarship Donor(s) | The United States Government |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1980 |