基础隔震结构的能力谱分析方法

Capacity-diagram method of base-isolated structures

能力谱法是一种简单而有效的对结构性能进行评估的静力弹塑性方法。本文将该方法引入到基础隔震结构性能评估中，并充分考虑了基础隔震结构的特点，对应用中的力学模型、横向水平力分布形式、需求谱建立及评估指标等问题进行了分析。最后给出了一个实际算例，并用时程分析法进行检验，证明该方法有一定的可靠性。

Capacity-diagram method is a simple and effective nonlinear static method that can evalu- ate performance of structures. This paper applies the method to evaluate the base-isolated struc- tures' performance, fully considers base-isolated structures' characteristic, and analyzes the ques- tions of mechanical model, the distributions of the lateral forces, the establishment of de- mand-diagram and evaluated indexes. At last this paper presents a factual example, and uses dynam- ic analysis method to test it and proves that it is credible.