Fragility curves are the primary way of assessing seismic risk for a building with numerous studies focused on deriving these fragility curves and how to account for the inherent uncertainty in the seismic assessment. This study focuses on a three-story steel moment frame structure and performs a fragility assessment of the building using a new approach called SPO2FRAG (Static Pushover to Fragility) that is based on pushover analysis. This new approach is further compared and contrasted against traditional nonlinear dynamic analysis approaches like Incremental Dynamic Analysis and Multiple Stripe Analysis. The sensitivity of the resulting fragility curves is studied against multiple parameters including uncertainties in ground motion, the type of analysis method used and the choice of curve fitting technique. All these factors influence the fragility curve behavior and this study assesses the impact of changing these parameters.

脆性曲线是评估建筑物地震风险的主要方法，许多研究集中在推导这些脆性曲线以及如何解释地震评估中的固有不确定性。本研究的重点是三层钢框架结构，并使用一种基于 Pushover 分析的称为 SPO2FRAG（Static Pushover to Fragility）的新方法对建筑物进行脆弱性评估。这种新方法与传统的非线性动态分析方法（如增量动态分析和多条带分析）进行了进一步比较和对比。针对多个参数（包括地面运动的不确定性、所使用的分析方法类型和曲线拟合技术的选择）研究了所得脆性曲线的敏感性。