As compared to design codes of practice in developed countries, the safety margin of structural members set in the Chinese Building Code for Concrete Structures is rather low.
我国混凝土结构设计规范的安全设置水准与国际通用标准之间存在着相当大的差距。
According to the computed result , the structure of NEEC is safe , but its safety margin is small, so the safety of the product should also be ensured through the design.
计算结果表明，该喷管出口锥与延伸锥结构是安全的，但考虑到材料性能的波动，安全余量较小，应从设计上保证产品的可靠性。
A vibration failure mode of structural system was presented according to engineering design criterion. The safety margin equation of the vibration failure mode was developed.
从工程上常用的振动设计准则出发，定义了振动问题的破坏模式，给出了以结构自振频率和外载频率为基本随机变量的安全边界方程。
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