|
| Firer beam element model for the collapse simulation of concrete structures under fire |
| Received:March 30, 2007 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20091012 |
| KeyWord:fiber model beam element fire nonlinearity |
| Author | Institution |
| 陈适才 |
清华大学 土木工程系,北京 |
| 陆新征 |
清华大学 土木工程系,北京 |
| 任爱珠 |
清华大学 土木工程系,北京 |
| 江见鲸 |
清华大学 土木工程系,北京 |
|
| Hits: 1407 |
| Download times: 1464 |
| Abstract: |
| In order to analyze and simulate the collapse of reinforced concrete (RC) elements under fire, a novel numerical model based on the fiber beam model is proposed in this paper. By dividing the cross section of RC beam element into many small concrete and steel fibers and assigning different materials to each fiber, this model can consider the non-uniform temperature distribution across the section and simulate the behavior of cracking or crushing for concrete and yielding for steel. The material stress-strain relationship at high temperature of each fiber is based on the model proposed by EuroCode 2. The explicit tangential stiffness matrix is deduced for proposed fiber beam with total Lagrange description, and the incremental equilibrium equations are also established. Finally, the fiber model proposed in this paper is validated by comparing with various experimental results. |
|
|
|