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| Analysis on calculating methods of shrinkage and creep effects of concrete widening bridge |
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| DOI：10.7511/jslx20086167 |
| KeyWord:bridge widening,shrinkage,creep,energy principle,displacement method |
| YE Jian-shu WEN Qing-jie |
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| Abstract: |
| For analysis of shrinkage and creep effects in old widening bridge,considering creep effect of stress aroused by concrete shrinkage and change of Yong's modulus at each time step,basic formula of shrinkage and creep was derived by displacement method,based on energy principle.Recursion formula of strain was developed by incremental method in condition of variable stress and constant stress in each time step separately,and calculating program was compiled,which is in agreement with test results.Compared with calculating results in condition of constant stress,time step on condition of variable stress can be enlarged to reduce calculating frequency and increase calculating speed of program. |
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