The objective of this paper is to present incremental dynamic analysis (IDA) and seismic performance evaluation results for a two‐story cold‐formed steel (CFS)–framed building. The archetype building was designed to current U.S. standards and then subjected to full‐scale shake table tests under the U.S. National Science Foundation Network for Earthquake Engineering Simulation (NEES) program. Test results showed that the building's stiffness and capacity were considerably higher than expected and the building suffered only nonstructural damage even at excitations in excess of Maximum Considered Earthquake levels for a high seismic zone. For the archetype building, three‐dimensional finite element models at different modeling fidelity levels were created using OpenSees. The models are subjected to IDA using the far‐field ground motion records prescribed in Federal Emergency Management Agency (FEMA) P695. Seismic performance quantification following the FEMA P695 procedure shows that if the modeling fidelity only follows the state‐of‐the‐practice, ie, only includes shear walls, unsafe collapse margin ratios are predicted. State‐of‐the‐art models that account for participation from CFS gravity walls and architectural sheathing have overall performance that are consistent with testing, and IDA results indicate acceptable collapse margin ratios, predicated primarily on large system overstrength. Neglecting the lateral force resistance of the gravity system and nonstructural components, as done in current design, renders a safe design in the studied archetype, but largely divorced from actual system behavior. The modeling protocols established here provide a means to analyze a future suite of CFS‐framed archetype buildings for developing further insight on the seismic response modification coefficients for CFS‐framed buildings.

中文翻译：

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具有重力框架和建筑护套的冷弯型钢框架建筑的增量动力分析和FEMA P695抗震性能评估

本文的目的是介绍两层冷弯型钢（CFS）框架建筑的增量动力分析（IDA）和抗震性能评估结果。该原型建筑的设计符合当前的美国标准，然后在美国国家科学基金会地震工程仿真网络（NEES）计划下进行了全面的振动台测试。测试结果表明，该建筑物的刚度和承载力大大高于预期，即使在高地震区的激发超过最大考虑的地震水平时，该建筑物也仅遭受非结构性破坏。对于原型构建，使用OpenSees创建了不同建模逼真度级别的三维有限元模型。使用联邦紧急事务管理局（FEMA）P695中规定的远场地面运动记录对模型进行IDA评估。按照FEMA P695程序进行的抗震性能量化表明，如果建模保真度仅遵循实践状态，即仅包括剪力墙，则可以预测不安全的塌陷裕度比。反映CFS重力墙和建筑外墙参与的最新模型具有与测试一致的总体性能，IDA结果表明可接受的坍塌裕度比，主要取决于大型系统的超强度。像目前的设计一样，忽略重力系统和非结构性组件的横向力阻力，可以在所研究的原型中提供安全的设计，但与实际的系统行为大相径庭。