Robustness Assessment of RC Framed Structures against Progressive Collapse

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS

土木建筑工程

Ventura, Antonio^1 ; Chiaia, Bernardino^1 ; De Biagi, Valerio^1

Politecnico di Torino, Diseg, Corso Duca degli Abruzzi, 24, Torino

10129, Italy^1

关键词: Codes of practice;    Framed structure;    Non-linear static analysis;    Progressive collapse;    Reinforced concrete frames;    Robustness assessment;    Structural behaviour;    Structural robustness;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/3/032033/pdf
DOI  :  10.1088/1757-899X/245/3/032033

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The structural behaviour of buildings under overloading or extraordinary events like impacts, explosions or human errors is extensively admitted to be an influential feature of structural design. Structural robustness is a requirement provided by many current design codes. However, the problem is often recognized in a qualitative manner without referring to a specific process for the evaluation or the achievement of the robustness of constructions. In this paper, a novel procedure derived from dynamic and non-linear static analyses is provided for evaluating and comparing the relative robustness of reinforced concrete (RC) frame buildings against progressive collapse. The developed methodology offers a formal way to compute "robustness curves" following the sudden loss of one or more vertical load carrying member/s. This method suggests a strategy for the definition of the robustness indices, which are applied to two RC frame buildings. The first building was designed for gravity load and earthquake resistance in accordance with Eurocode 8 and the second was the same structure, modified according to the tie force (TF) method. The TF method is one of the major design quantitative procedures for enhancing resistance to progressive collapse and it is currently recommended by the codes of practice. In an attempt to demonstrate the suitability of the procedure, the structural robustness and resistance to progressive collapse of the two schemes is compared.