A hypothesis sandwich analytical theory is used, and the formulas for calculation of the creepcollapse critical time is given in this paper.
运用假想夹层分析理论，导出了一个较为简便的不锈钢包壳在通常工作环境下蠕变坍塌临界时间的计算公式。
2
Supported by the national physical science major fund project (project number: 50238040), the paper researched the creepcollapse effect of the concrete structure systematically.
The mechanical model of collapse medium is investigated theoretically which revealed that the mechanical model of collapse medium is accord to non-linear nature of rock creep Kelvin model.