Abstract
In order to study the fatigue behavior of steel-concrete composite beams, ANSYS software packet was employed to simulate the behavior of steel-concrete composite beams under fatigue loads in this paper. After the finite element models were built for seven composite beams, which had different reinforcement ratio and concrete compressive strength, the stress amplitude and fatigue life were analyzed, then the relevant S-N curves were obtained, and a comparison was made among the experimental results, finite element analysis and related design codes. The results show that when the cubic strength increases from 36.4 MPa to 41.8 MP, the fatigue life increases 1.48 times. Under the same conditions, the value of the stress amplitude increases 9.9 MPa, and the fatigue lives increase 128 thousand and 240 thousand cycles in terms of experimental results and analytical values respectively. The reinforcement ratio, concrete compressive strength and stress amplitude are the main influencing factors of the fatigue life for composite beams, and the reinforcement ratio has more apparent influence on the fatigue life than concrete compressive strength.
| Original language | English |
|---|---|
| Pages (from-to) | 111-115 |
| Number of pages | 5 |
| Journal | Shenyang Jianzhu Daxue Xuebao (Ziran Kexue Ban)/Journal of Shenyang Jianzhu University (Natural Science) |
| Volume | 25 |
| Issue number | 1 |
| State | Published - Jan 2009 |
| Externally published | Yes |
Keywords
- Fatigue
- Fatigue life
- Fatigue load
- Finite element analysis
- Steel-concrete composite beam