Finite element analysis of the response of steel frame subjected to high temperature | |
| Author | Thein Nu |
| Call Number | AIT Thesis no.ST-05-02 |
| Subject(s) | Steel--Thermal properties Steel, Structural Finite element method |
| 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 |
| Series Statement | Thesis ; no. ST-05-02 |
| Abstract | This report investigates the behavior of simply supported steel beam supporting the concrete slab and simple frame at high temperatures using the nonlinear finite element program ANSYS. This research provides some detail on a single span two dimensional beam behaviour in relation to temperature dependent material properties. Two dimensional nonlinear transient thermal analysis and structural analysis including both material and geometric nonlinearity were carried out using finite element approach. It includes how the fire resistance mechanism works and how it changes the material properties and influence the behaviour of the conventional floor beams. A 254x146UB 43 steel I beam supporting a concrete slab 120mm thick is exposed to three side heating to simulate the effects of the ISO 834 standard fire from fire tests. In this simulation, thermal bowing and thermal elongation can be seen clearly due to differences between top and bottom flanges temperatures of conventional floor beam. It was also found that when the EC3 Proportional and EC3 Yield Limit stresses were reached in the steel section, displacements at mid span, axial stresses along the section were affected. Sample frame subjected to uniform heating was also included in this nonlinear structural analysis. |
| Year | 2005 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-05-02 |
| 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) | Barry, William J.; |
| Examination Committee(s) | Pichai Nimityongskul;Pennung Warnitchai; |
| Scholarship Donor(s) | Government of Germany (KAAD) / Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2005 |