II、III类不同场地类别对计算结果的影响

Effect to the compute results in different site class of II and III

在工程设计中,经常会碰到同一结构建于不同场地类别时的情况,尤其是分别建于II、III类不同的场地。本文从设计反应谱出发,分析计算了同一结构处于III类和II类场地时计算结果的比值,绘出了该比值曲线图,并结合实际工程对其进行了验证。在工程设计或估算中,可直接根据该曲线图计算得到该比值。

In engineering design, we often face the case which a same structure be constructed in different site class, special in Ⅱ and Ⅲ site. This paper computes the result ratio of Ⅲ site and Ⅱ site of same structure, basis on the design response spectra. And the ratio curve was drawn. At last, some real engineering were computed to validate the conclusion. In engineering design or estimate, we can find the ratio from the curve directly.