Abstract
Progressive collapse of building structures is generally triggered by a local failure due to accidental actions, followed by subsequent chain effect of the structures which may result in wide range failure or even collapse of the entire buildings. Since the “911” event, progressive collapse of building structures has been widely concerned by engineers and researchers. This paper assesses the current researches on this issue from experimental study, numerical simulation and theoretical analysis. Given the limitation of costs and difficulties of experimental tests, the experimental studies investigate the collapse mechanism, such as development of stress/strain and damage/failure of materials, mainly via the scaled down specimens of structural components and substructures. On the other hand, the collapse behavior of entire building structures is analyzed via the numerical methods, such as the finite element method and the discrete element method. Further, the collapse resistance demand and the robustness assessment for building structures are theoretically studied in depth in which the simplified theoretical models of the collapse-resisting demand and the collapse risk assessment are proposed respectively. At last, the design method to prevent progressive collapse for building structures is also discussed.
Highlights
A progressive collapse of a building is initiated by an unexpected event that causes local damage and subsequently propagates throughout the structural system, leading to a final damage state in large-scale or entire collapse of the building [1]
In China, the provisions related to progressive collapse are presented in Code for Concrete Structure Design (GB50010-2010) [6] and Technical Specification for Concrete Structure of Tall Building (JGJ3-2010) [7]
This paper summarizes the existing researches on the progressive collapse of building structures and especially focuses on its development in experimental study, numerical simulation and theoretical analysis, as shown in Fig. (5)
Summary
A progressive collapse of a building is initiated by an unexpected event that causes local damage and subsequently propagates throughout the structural system, leading to a final damage state in large-scale or entire collapse of the building [1]. In China, the provisions related to progressive collapse are presented in Code for Concrete Structure Design (GB50010-2010) [6] and Technical Specification for Concrete Structure of Tall Building (JGJ3-2010) [7]. Both of them only provide basic rules for the principles and requirements for progressive collapse design, while specific specification for buildings is still on the consultation stage. This paper summarizes the existing researches on the progressive collapse of building structures and especially focuses on its development in experimental study, numerical simulation and theoretical analysis, as shown in Fig. The design method for building structures to prevent progressive collapse is discussed
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