引入结构屈服水平系数，建立了结构的延性需求谱，使地震动的幅值特性和频谱特性可以分开考虑。
By introducing the yielding level factor and constructing the ductility demand spectrum, the characteristic of peak values and frequency contents of ground motions are considered separately.
最后讨论了提高结构屈服后刚度的措施，并通过典型算例说明了在结构系统层次上实现强化型结构的方法。
The methods to increase the post-yielding stiffness and some practical examples are finally presented in this paper.
地震力降低系数对设防烈度地震作用的整体降低实际上决定了结构的屈服水准和对结构延性需求的大小。
Lower coefficient of earthquake seismic intensity of the security role in the decision to lower the overall structure of the yield of standard size and structure of the extensive demand.
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