Research Article
An Evaluation Method for Effective Prestress of Simply Supported Prestressed Concrete Beams with Breathing Cracks
Table 4
Error analysis on the results with different strength characteristics (XFEM).
| | Strength characteristics of strands | P (by stress change of rebars in the tension zone, as shown in Figure 10) | P (by concrete strain distribution, as shown in Figure 11) | σp0 | | Ptheory × 104 (N) | PXFEM × 104 (N) | Error (%) | Ptheory × 104 (N) | PXFEM × 104 (N) | Error (%) | σp0XFEM (MPa) | σp0test (MPa) | Error (%) |
| | Np0 | 2.81 | 2.81 | 0 | 2.81 | 2.81 | 0 | 786.16 | 731.01 | −7.0 | | 1.25Np0 | 3.89 | 3.89 | 0 | 3.89 | 3.89 | 0 | 980.67 | 955.94 | −2.5 | | 1.7Np0 | 5.79 | 5.79 | 0 | 5.79 | 5.75 | −0.7 | 1323.79 | 1315.82 | −0.6 |
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Ptheory and Ptest are, respectively, the theoretical and simulated vertical loads at the mid-span of the test beams.
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