| Civil and Mechanical Engineering |
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| Tensile force correction calculation method for prestressed construction of tension structures |
| Xin ZHUO, Guo-fa ZHANG, Koichiro ISHIKAWA, Dao-an LOU |
| Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China; Department of Architecture and Civil Engineering, Fukui University, Fukui 910-8507, Japan; Zhejiang Zhancheng Construction Group Co., Ltd., Hangzhou 310005, China |
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Abstract Factors such as errors during the fabrication or construction of structural components and errors of calculation assumption or calculation methods, are very likely to cause serious deviation of many strings’ actual prestressing forces from the designed values during tension structure construction or service period, and further to threaten the safety and reliability of the structure. Aiming at relatively large errors of the prestressing force of strings in a tension structure construction or service period, this paper proposes a new finite element method (FEM), the “tensile force correction calculation method”. Based on the measured prestressing forces of the strings, this new method applies the structure from the zero prestressing force status approach to the measured prestressing force status for the first phase, and from the measured prestressing force status approach to the designed prestressing force status for the second phase. The construction tensile force correction value for each string can be obtained by multi-iteration with FEM. Using the results of calculation, the strings’ tensile force correction by group and in batch will be methodic, simple and accurate. This new calculation method can be applied to the prestressed correction construction simulation analysis for tension structures.
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Received: 27 November 2007
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