Abstract
In order to improve the calculation method of creak width of concrete beams strengthened with CFRP sheet, based on the theory of bond-slippage, the calculation formulas for the crack spacing and width of concrete beam strengthened with CFRP sheet are derived, and theoretical calculation method for the crack width is presented, which is suitable for concrete and prestressed concrete beams strengthened with CFRP sheet. On the other hand, following the traditional idea of crack width of reinforced concrete structures, the influence coefficients considering the CFRP sheet and the bonded prestressing steel are introduced in the calculation formula of the average crack width lm. The influence coefficient δf considering the CFRP sheet and the bonded prestressing steel is introduced in the calculation formula of crack width wm and the calculation formula of coefficient of uneven stress of steel bar ψ, and the corresponding semi-theoretical-semi-empirical formula is given. The calculation results in above two methods are in good agreement with the test results.
| Original language | English |
|---|---|
| Pages (from-to) | 180-185 |
| Number of pages | 6 |
| Journal | Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology |
| Volume | 42 |
| Issue number | 2 |
| State | Published - Feb 2010 |
| Externally published | Yes |
Keywords
- Carbon fiber reinforced polymer
- Concrete beam
- Crack width
- Prestressed concrete beam
- Strengthening
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