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结合规范的规定,阐述了扭转周期和平动周期的判别以及当第一、二振型为扭转振型时,结构如何做出相应的调整以满足规范要求。
In combination with the rules of the specification, the discrimination between torsional period and translational period is expounded and how the structure is adjusted to meet the specifications when the first and second modes are torsional modes.