场地类别模糊划分和地震动反应谱参数的计算及其应用

Calculation and application of fuzzy classification of site type and response spectrum parameters of ground vibration

采用了模糊分类的方法来进行场地类别划分,使用隶属度函数和其它不同的插值方法计算了一个工程实例的场地反应谱特征周期和地震加速度调整系数,分析了各种插值方法的优缺点。针对石家庄地区剪切波速处于Ⅱ类、Ⅲ类界限附近的情况,分析了错划场地类别对超限/非超限乙、丙类抗震建筑物的结构设计的影响。建议划分场地类别除了要考虑剪切波速数值和覆盖层厚度以外,尚需综合考虑地质年代等因素的影响。

The site category is classified by fuzzy classification method using membership function and other methods to calculate the ground response spectrum characteristics of the cycle.The advantages and disadvantages of various interpolation methods are discussed.The influence of incorrect site classification on the earthquake-resistant design of building structure of category B&C with the shear wave velocity just near boundaries of site type II and III in Shijiazhuang area is analyzed.It is suggested that besides the shear wave velocity and overburden thickness,the influence of geologic age should be taken into account in the site classification.