Abstract This paper provides a design-based framework in collapse assessment of multi-storey steel framed-structures. A simple approach for different column-removal scenarios of the structure is proposed, wherein the three-dimensional effects of the floor system, boundary restraints of the affected substructure and potential vierendeel actions in multi-storey framed-structures are incorporated. The effectiveness of the approach proposed is verified against numerical analyses on a full-scale steel frame with six-storey. Extensive discussions are also made from the comparisons between the results from the simplified approach and numerical simulations with finite element method (FEM). The proposed approach is found to sometimes give conservative evaluations for the column destabilizing-induced collapse of the structure, which ensures sufficient security in the robustness assessment of the structure. For the beam/connection failure-induced collapse, the proposed approach can obtain more reliable assessment conclusions.

中文翻译：

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一种单柱损失的多层钢框架结构倒塌评估的简化方法

摘要 本文为多层钢框架结构的倒塌评估提供了一个基于设计的框架。提出了一种针对结构的不同柱拆除场景的简单方法，其中结合了地板系统的三维效应、受影响子结构的边界约束和多层框架结构中的潜在跨界作用。所提出的方法的有效性通过对六层全尺寸钢框架的数值分析进行验证。通过比较简化方法和有限元方法 (FEM) 数值模拟的结果，也进行了广泛的讨论。发现建议的方法有时对柱不稳定引起的结构倒塌给出保守的评估，这确保了结构稳健性评估的足够安全性。对于梁/连接失效引起的倒塌，所提出的方法可以获得更可靠的评估结论。