irregular frame structures 不规则框架结构
irregular syntactic structures 不规则句法结构
irregular high-rise structures 不规则高层建筑结构
Buildings can be classified into regular, normal irregular, beyond normal irregular and seriously irregular structures, according to the degree of irregularity.
建筑物按不规则程度可以分为：比较规则的结构、一般不规则结构、特别不规则结构和严重不规则结构。
The theory and method of performance-based seismic design and the problem when it used in irregular structures were discussed in the text.
在阅读大量文献的基础上对结构基于性能的抗震设计在理论和方法以及在不规则结构中存在的问题进行了探讨。
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