scholarly journals Numerical Investigation of Structural Response of Corrugated Blast Wall Depending on Blast Load Pulse Shapes

2017 ◽  
Vol 14 (9) ◽  
pp. 1710-1722 ◽  
Author(s):  
Jung Min Sohn ◽  
Sang Jin Kim
Keyword(s):  
Numerical Investigation ◽  
Structural Response ◽  
Blast Load ◽  
Load Pulse

Experiment and numerical investigation on structural response of a FMRC hexagon enclosed platform in waves

2021 ◽  
Vol 233 ◽  
pp. 108998
Author(s):  
Weiqin Liu ◽  
Xiaoxuan Guo ◽  
Guowei Zhang ◽  
Hao Wu ◽  
Ye Li ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Structural Response

scholarly journals Structural Response and Reliability Analysis of RC Beam Subjected to Explosive Loading

2011 ◽  
Vol 82 ◽  
pp. 434-439 ◽  
Author(s):  
Maurizio Acito ◽  
Flavio Stochino ◽  
Sergio Tattoni
Keyword(s):  
Reinforced Concrete ◽  
Reliability Analysis ◽  
Nonlinear Dynamic Analysis ◽  
Structural Response ◽  
Blast Load ◽  
Rc Beam ◽  
Maximum Displacement ◽  
Sdof System ◽  
Flexural Member ◽  
Random Nature

The random nature of the explosion load, associated with the random nature of material properties, and geometric dimensional characteristics, implies the need to consider them into the reliability analysis in order to have a more correct estimation of the structural behavior. Therefore, when the randomness of these parameters in the analysis is considered, the response of the structure assumes probabilistic nature, and this makes it necessary to look into the reliability measure. This paper presents results from a parametric investigation of the reliability of reinforced concrete (RC) beam subjected to blast load. The probabilistic responses of the maximum displacement for a reinforced concrete flexural member under blast loadings are evaluated by means of nonlinear dynamic analysis with simplified equivalent single-degree-of-freedom (SDOF) system. Results of numerical simulations have shown the response of structures, in terms of maximum displacement in relation also to the blast load and the geometrical and mechanical characteristics of the beams. Monte Carlo simulation of dynamic response of the equivalent SDOF system is performed to estimate the reliability.

scholarly journals Numerical Simulation of Blast Loaded CFRP Retrofitted Steel Plates

2021 ◽  
Vol 347 ◽  
pp. 00038
Author(s):  
Mujtaba M. Shuaib ◽  
Steeve Chung Kim Yuen ◽  
Gerald N. Nurick
Keyword(s):  
Finite Element ◽  
Numerical Study ◽  
Structural Response ◽  
Steel Plates ◽  
Blast Load ◽  
Cylindrical Charge ◽  
Arbitrary Lagrangian Eulerian ◽  
Finite Element Software ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer

This paper reports on the results of a numerical study to simulate the response of carbon fibre reinforced polymer (CFRP) retrofitted steel plates to applied blast loads using finite element software, LS-DYNA. The results of the simulation were validated against plate response and magnitude of deformation obtained from previous experiments. The uniform blast load was generated in the experiment by detonating a cylindrical charge down the end of a square tube. The finite element code LS-DYNA was used to simulate the structural response of the respective blast structures. For the numerical model, the blast load was simulated using the mapping feature available in LS-DYNA for the multi-material arbitrary Lagrangian-Eulerian (MM-ALE) elements which significantly reduced the size of the air domain in the model. The simulations showed a satisfactory correlation with the experiments for the blast results and post-failure deformations that occurred in CFRP retrofitted steel plates.

scholarly journals Transient Response of RC Panel Protected with Slurry Infiltrated Micro Reinforced Concrete Jacket under Blast Loading

2019 ◽  
Vol 8 (2) ◽  
pp. 1196-1210
Keyword(s):  
Reinforced Concrete ◽  
Blast Resistance ◽  
Structural Response ◽  
Time History ◽  
Damage Variable ◽  
Wire Mesh ◽  
Blast Load ◽  
Terrorist Attacks ◽  
Mesh Reinforcement ◽  
Single Side

With increase in terrorist attacks, there are definite priority to protect the important infrastructure facilities against possible terrorist attacks. In order to improve blast resistance capacity of RCC panel, in present study, it was strengthened with Slurry Infiltrated Micro Reinforced Concrete (SIMRC) jacket. . The SIMRC jacket strengthened RC panel was analyzed under blast load scenario using finite element method based application, ABAQUS. The dynamic behavior of concrete and grout of SIMRC was modeled using concrete damaged plasticity model. The structural response of RC panel without any strengthening was compared with SIMRC strengthened RC panel to investigate effectiveness of SIMRC jacketing to resist blast load. Parametric study was carried out considering SIMRC jacket on single side or both side of RC panel, with different ratio of thickness of jacket to thickness of RC panel (t/D) and different percentage of wire mesh reinforcement for jacket. Simulation of various analysis results were presented in form of displacement time history, distribution of tensile/compressive damage variable explaining the pattern of failure in the RC panel, comparison of distribution of tensile damage variable on front and back jacket, compression damage variable of RC panel. It was observed that for panels with strengthening displacement and damaged areas are reduced as compared to conventional RC panel. The increase in thickness ratio (t/D), percentage of wire mesh reinforcement in jacket also contribute to increase blast resistance capacity of SIMRC Jacket. It was also observed that the jacketing on both side of RC panel is more effective in reducing the displacement and the damage is observed to be spread over the support areas. Obtained results through present study demonstrate the effective use of SIMRC jacketing as blast mitigation measure.

Blast Load Inside Enclosure due to Flame Acceleration

2015 ◽  
Author(s):  
Jihui Geng ◽  
J. Kelly Thomas
Keyword(s):  
Structural Response ◽  
Blast Load ◽  
Blast Loads ◽  
Load History ◽  
Blast Pressure ◽  
Pressure History ◽  
Flame Acceleration ◽  
Number Of Factors ◽  
Laboratory Facilities ◽  
Environment Temperature

Enclosed chemical processes, laboratory facilities, boilers and reformer furnaces are typical examples of facilities and equipment where an internal VCE may be postulated to occur. The applied blast load history on the enclosure surfaces is required in order to assess the response of the enclosure to the postulated VCE. The internal blast pressure history and associated applied blast loads depend on a number of factors, such as: (1) the maximum flame speed attained in a flammable cloud, (2) the ratio of the cloud volume to the total enclosure volume, (3) the cloud location within the enclosure, and (4) the environment temperature. The purpose of work described in this paper was to investigate the dependence of internal blast pressure history and applied blast loads on the aforementioned factors. It was found that the applied loads on the enclosure surfaces can be roughly classified into two regimes: quasi-static and dynamic, depending on the combination of these factors. It can be important to identify the appropriate blast loading regime in order to properly analyze the structural response of the enclosure.

Air blast load generation for simulating structural response

2010 ◽  
Vol 10 (5) ◽  
pp. 429-455 ◽  
Author(s):  
Emily L. Guzas ◽  
Christopher J. Earls
Keyword(s):  
Structural Response ◽  
Blast Load ◽  
Air Blast ◽  
Load Generation

A Study on Dynamic Behavior of Offshore Structures Under the Blast Load

2011 ◽  
Author(s):  
Kun-Hee Lee ◽  
Ki Young Yoon
Keyword(s):  
Nonlinear Dynamic ◽  
Oil And Gas ◽  
Nonlinear Dynamic Analysis ◽  
Structural Response ◽  
Offshore Structures ◽  
Blast Load ◽  
Economic Approach ◽  
Offshore Structure ◽  
Oil And Gas Development ◽  
High Possibility

Safety verification against blast load is important in offshore structure for oil and gas development which have the high possibility of explosion accident. The structural response against blast is a nonlinear dynamic phenomenon, it is necessary the nonlinear dynamic analysis for accurate structural behavior. But it requires much more computing resource and manpower than conventional linear analysis. Therefore, simple approaches such as modified code check and Biggs’ simplified SDOF have been widely used for the structural verification. These approaches are very useful in design for simplicity and conservativeness. However, they don’t represent proper dynamic characteristics, thus sometimes they may cause excessively conservative. In this paper, the dynamic characteristic of structures beyond the yield point is studied by using nonlinear dynamic FE analysis and more safe and economic approach is suggested.

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