Numerical study of precast segmental column under blast loads

2017 ◽  
Vol 134 ◽  
pp. 125-137 ◽  
Author(s):  
Jun Li ◽  
Hong Hao ◽  
Chengqing Wu
Keyword(s):  
Numerical Study ◽  
Blast Loads ◽  
Segmental Column

scholarly journals Behaviour and Failure of Steel Columns Subjected to Blast Loads: Numerical Study and Analytical Approach

2018 ◽  
Vol 2018 ◽  
pp. 1-20 ◽  
Author(s):  
Haitham Al-Thairy
Keyword(s):  
Parametric Study ◽  
Analytical Approach ◽  
Numerical Study ◽  
Slenderness Ratio ◽  
Compressive Force ◽  
Design Procedure ◽  
Blast Load ◽  
Blast Loads ◽  
Steel Columns ◽  
Failure Patterns

The main objective of this study is the numerical simulation of the behaviour and failure patterns of steel columns under blast loads using the dynamic finite element package ABAQUS/Explicit. A numerical model is suggested and validated against published experimental tests on full-scale wide-flange steel columns subjected to dynamic blast loads under constant axial compressive force. Afterwards, the validated model is used to investigate the effect of important parameters on the behaviour and failure patterns of steel columns under blast pressure through an extensive parametric study. The parameters include the blast impulse, the blast energy, the blast load, the blast duration, the column boundary condition, the column slenderness ratio, and the blast direction. The conclusions extracted from this parametric study may be used to develop a thorough understanding of the behaviour and failure of steel columns subjected to blast load which, in turn, could lead to a more accurate practical design procedure. The study also presents derivations and validations of a proposed analytical approach to calculate the critical blast impulse at which a steel column losses its global stability. Comparison between the critical impulse-axial force curves obtained from the proposed equation and that extracted from numerical simulations indicates the validity and feasibility of the proposed equation.

Simplified theoretical analysis and numerical study on the dynamic behavior of FCP under blast loads

2020 ◽  
Vol 14 (4) ◽  
pp. 983-997 ◽  
Author(s):  
Chunfeng Zhao ◽  
Xin Ye ◽  
Avinash Gautam ◽  
Xin Lu ◽  
Y. L. Mo
Keyword(s):  
Theoretical Analysis ◽  
Dynamic Behavior ◽  
Numerical Study ◽  
Blast Loads

scholarly journals The response of circular plates to repeated uniform blast loads: An experimental and numerical study

2014 ◽  
Vol 74 ◽  
pp. 36-45 ◽  
Author(s):  
T.F. Henchie ◽  
S. Chung Kim Yuen ◽  
G.N. Nurick ◽  
N. Ranwaha ◽  
V.H. Balden
Keyword(s):  
Numerical Study ◽  
Circular Plates ◽  
Blast Loads

scholarly journals Numerical Study of Damage Modes and Damage Assessment of CFST Columns under Blast Loading

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Junhao Zhang ◽  
Shiyong Jiang ◽  
Bin Chen ◽  
Chunhai Li ◽  
Hao Qin
Keyword(s):  
Numerical Study ◽  
Load Capacity ◽  
Progressive Collapse ◽  
Blast Loading ◽  
Steel Tube ◽  
Critical Parameters ◽  
Blast Loads ◽  
Finite Element Program ◽  
Damage Degree ◽  
Cfst Columns

Columns of frame structures are the key load-bearing components and the exterior columns are susceptible to attack in terrorist blasts. When subjected to blast loads, the columns would suffer a loss of bearing capacity to a certain extent due to the damage imparted, which may induce the collapse of them and even cause the progressive collapse of the whole structure. In this paper, the high-fidelity physics-based finite element program LS-DYNA was utilized to investigate the dynamic behavior and damage characteristics of the widely used concrete-filled steel tube (CFST) columns subjected to blast loads. The established numerical model was calibrated with test data in open literatures. Possible damage modes of CFST columns under blast loading were analyzed, and the damage criterion based on the residual axial load capacity of the columns was adopted to assess the damage degree. A parametric study was conducted to investigate the effects of critical parameters such as blast conditions and column details on the damage degree of CFST columns. Based on the numerical simulation data, an empirical equation was proposed to estimate the variation of columns damage degree with the various parameters.

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