Research Article
A Simplified Calculation Method of Length Adjustment of Datum Strand for the Main Cable with Small Sag
Table 1
Comparison of the calculation results of the unstressed length and cable length adjustment.
| | Item | Theory of catenary | Quasi-catenary theory | Perfect solution of parabola theory | Traditional simplified formula | The improved simplified formula I | The improved simplified formula II |
| | Unstressed cable length (m) | 237.56707 | 237.56706 | 237.57255 | 238.12012 | 237.55485 | / | | Cable length error (m) | 0 | −0.00001 | 0.00548 | 0.55305 | −0.01222 | / | | Cable length adjustment (mm) | 33.60 | 35.95 | 34.4279 | 13.21 | 34.4278 | 33.9906 | | Relative error of adjustment | 0% | 7.0% | 2.5% | −60.7% | 2.5% | 1.2% |
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