Open Access
Damage propagation in reinforced concrete frames under external blast loading
Reads0
Chats0
TLDR
In this article, a two-dimensional reinforced concrete (RC) frame was modeled with reinforcement details and appropriate materials to simulate strain rate effects and reported the influence of blast propagation as displacements and material yielding of the structural elements in the RC frame.Abstract:
Iconic and significant buildings are the common target of bombings by terrorists causing large numbers of casualties and extensive property damage. Recent incidents were external bomb attacks on multi-storey buildings with reinforced concrete frames. Under a blast load circumstance, crucial damage initiates at low level storeys in a building and may then lead to a progressive collapse of whole or part of the structure. It is therefore important to identify the critical initial influence regions along the height, width and depth of the building exposed to blast effects and the structure response in order to assess the vulnerability of the structure to disproportionate and progressive collapse.
This paper discusses the blast response and the propagation of its effects on a two dimensional reinforced concrete (RC) frame, designed to withstand normal gravity loads. The explicit finite element code, LS DYNA is used for the analysis. A complete RC portal frame seven storeys by six bays is modelled with reinforcement details and appropriate materials to simulate strain rate effects. Explosion loads derived from standard manuals are applied as idealized triangular pressures on the column faces of the numerical models.
The analysis reports the influence of blast propagation as displacements and material yielding of the structural elements in the RC frame. The effected regions are identified and classified according to the load cases. This information can be used to determine the vulnerability of multi-storey RC buildings to various external explosion scenarios and designing buildings to resist blast loads.read more
Citations
More filters
Journal ArticleDOI
Blast response and safety evaluation of a composite column for use as key element in structural systems
TL;DR: In this article, the authors presented the blast response, damage mechanism and evaluation of residual load capacity of a concrete-steel composite (CSC) column using dynamic computer simulation techniques.
Journal Article
Quality of computerized blast load simulation for non-linear dynamic response analysis of framed structures
TL;DR: In this paper, a numerical study has been conducted to determine the quality of blast load simulation for nonlinear dynamic response analysis of framed structures subjected to such loads at various stand-off distances with due consideration to the provisions and requirements of Unified Facility Criteria UFC 2005.
Journal Article
Analysis of Blast Loading Effect on High Rise Buildings
A. V. Kulkarni,Sambireddy G +1 more
TL;DR: In this article, the authors presented the dynamic response of a high rise Structure subjected to blast load using a nonlinear modal analysis and used it to evaluate the behavior of the building from a global perspective.
References
More filters
Blast Loading and Blast Effects on Structures - An Overview
TL;DR: In this article, a comprehensive overview of the effects of explosion on structures is presented, and different methods to estimate blast loads and structural response are introduced, and an explanation of the nature of explosions and the mechanism of blast waves in free air is given.
Journal ArticleDOI
Numerical derivation of pressure-impulse diagrams for prediction of RC column damage to blast loads
TL;DR: In this article, a new damage criterion for RC column is defined based on the residual axial load-carrying capacity, and a numerical method to generate pressure-impulse diagrams for RC columns is proposed.
Journal ArticleDOI
Analysis of building collapse under blast loads
TL;DR: The analysis of the structural failure of a reinforced concrete building caused by a blast load is presented in this paper, where all the process from the detonation of the explosive charge to the complete demolition, including the propagation of the blast wave and its interaction with the structure is reproduced.
Journal Article
A review of methods for predicting bomb blast effects on buildings
TL;DR: In recent years, explosive devices have become the weapon of choice for the majority of terrorist attacks as discussed by the authors, such as the accessibility of information on the construction of bomb devices, rela...
Journal ArticleDOI
Murrah Building Bombing Revisited: A Qualitative Assessment of Blast Damage and Collapse Patterns
TL;DR: The authors of as discussed by the authors suggest that only one column was destroyed by direct structural blast effects, while the other three buckled due to loss of lateral support provided by beams and floor diaphragms that were destroyed by the blast.