传统增量动力分析(IDA)方法没有考虑结构的随机性,该文将基于Nataf变换的点估计法与单地震动记录增量动力分析相结合,提出了考虑结构随机性的IDA方法。将该方法应用于钢筋混凝土框架结构,分析得到随机IDA曲线。结果表明:该方法可有效地考虑结构随机性对IDA分析结果的影响。
The conventional Incremental Dynamic Analysis (IDA) method doesn't take into account the inherent randomness in structures.In this paper,a new IDA method considering structural random properties is put forward,which combines a new point estimate method based on Nataf transformation with the single-record IDA method.The new approach is applied to a R.C.frame structure,for which the random IDA curves are obtained.It is demonstrated through a numerical example that the new IDA method can be efficiently used to investigate the effect of structural random properties on IDA results.