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| Total variables recurrence method of concrete creep and program design |
| Received:February 21, 2009 Revised:August 06, 2010 |
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| DOI：10.7511/jslx201102024 |
| KeyWord:concrete creep total variables recurrence recovery impulse program design |
| Author | Institution |
| 傅学怡 |
哈尔滨工业大学 深圳研究生院,深圳 |
| 孙璨 |
哈尔滨工业大学 深圳研究生院,深圳 |
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| Abstract: |
| Under long-term loads, concrete creep deformation was not only connected with current stress, but also depended much on the stress history. Generally, every step of creep calculation methods needs to memorize the whole stress history, causing very poor computing efficiency. Making use of the traits of exponential function, creep increment recurrence that only memorizing current stress could be established. While, for many kinds of non-exponential creep function applied in the design codes, the increment formula was not applicable any more. Based on creep recovery theory and stress impulse function, the total variables recurrence method was presented. Visual Fortran was applied into compiling general analysis program, and the program design flow was shown. By research and application, it was indicated that this method could meet precision requirement by memorizing part of stress history, and improve the calculation efficiency greatly. And the method was fit for different kinds of creep and loading modes. At last, the primary factor values were suggested for different types of creep function. |
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