研究还发现，存在一个最大的隔震结构周期使高宽比限值等于零或隔震层位移超过容许值。
It is also found that there exists a maximum isolated structure period at which the height width ratio is zero or the displacement of the rubber bearing exceeds the allowable value.
以钢结构设计原理中的极限状态设计法或容许应力法为基础，阐述了预应力加固钢结构的分阶段加固设计计算原理和方法。
Based on limit-state design method in steel structure design principle, the principle and method of phased strengthening design of steel structures strengthened by prestressing is represented here.
讨论了墩木搁置基础、墩木最大容许承压面积及船体首、尾结构强弱对优化结果的影响。
The effect of the foundation on which blocks stand, maximum allowable stressed area of a wooden block, and the condition of fore and stern hull structures on optimum results are discussed.
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