Abstract
Experiment on cave-in bearing capacity of 9 grouted-round-steel tube was carried out. Influence of some factors on cave-in bearing capacity of grouted-round-steel tube was analyzed, such as ratio of branch tube diameter to main tube diameter, characteristic and value of axial force acting on chord. The experiment result shows: The cave-in bearing capacity of grouted-round-steel tube will be strengthened by increasing the ratio of branch tube diameter to main tube diameter or axial pressure acting on the main tube; but axial tension has little effect on the cave-in bearing capacity, and failure of grouted-round-steel tube is ductile, which has great safety margin. In addition to these factors in model experiment, influence of dimension of chord, thickness of chord's wall, strength of hardened cement pastes and strength of chord steel on cave-in bearing capacity were analyzed by finite element numerical simulation analysis. Based on model experiment and simulated experiment, mechanical property of grouted-round-steel tube in cave-in failure mode was analyzed, then, the formula of cave-in ultimate bearing capacity of grouted-round-steel tube was established. It provides basic data for spreading encased steel truss concrete composite beam.
| Original language | English |
|---|---|
| Pages (from-to) | 85-91 |
| Number of pages | 7 |
| Journal | Jianzhu Jiegou Xuebao/Journal of Building Structures |
| Volume | 29 |
| Issue number | 2 |
| State | Published - Apr 2008 |
| Externally published | Yes |
Keywords
- Cave-in ultimate bearing capacity
- Grouted-round-steel tube
- Model test
- Simulated experiment
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