时程分析中罕遇地震动的选择

该文以地震动模型化为基础并结合现有各种选波方法,提出了以地震动参数为主的参数化选波方法。参数化选波方法主要是通过限制所选择的地震动的各个参数在一定范围之内,以使得入选的地震记录的反应谱与目标反应谱比较接近。论文最后以典型案例为例,从力和变形、能量的角度对比了双频段选波方法、ASCE-7规范中的选波方法和文中提出的参数化方法。计算结果表明,从力和变形的角度,结构在此三种选波方法选出的地震波作用的计算结果比较接近,但是,从能量角度,当利用文内选波方法选出的地震波作为结构的输入时候所计算的结果要较利用其他两种方法作为结构的输入的计算结果大。

Selection of Rare Ground Motions in Time History Analysis

Based on the ground motion model, and combined with the existing wave selection methods, this paper presents the parameterized method with most ground motion parameters. The method limits the parameters of the selected ground motions to make the mean response spectrum close to the target response spectrum. Based on some typical cases, this method is compared with dual-band selective method and the one in ASCE-7 regulation from the as-pects of strength, deformation and energy. The results show that the result obtained with the ground motion as the input of the structure selected with the presented method is greater than that gained with the other two methods.