Dynamic behaviour of unstiffened stainless steel profiled barrier blast walls

Hedayati, Mohammad H.; Sriramula, Srinivas; Neilson, Richard David

doi:10.1080/17445302.2017.1400422

Cited by 2 publications

(3 citation statements)

References 14 publications

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“…A nonlinear predictive model with three parameters R 0 , R s (explosion related), and T in (14) which are blast wall related can be suggested as in the following form:…”

Section: Model With Three Parametersmentioning

confidence: 99%

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A Predictive Model for Damage Assessment and Deformation in Blast Walls Resulted by Hydrocarbon Explosions

Aleyaasin

2019

Advances in Civil Engineering

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In this paper, a new method is developed to find the ductility ratio in blast walls, resulted by hydrocarbon explosions. In this method, only the explosion energy and distance from the centre of explosion are required to find the damage by using simple predictive models in terms of empirical-type formulas. The explosion model herein is a TNO multiphysic method. This provides the maximum overpressure and pulse duration in terms of the explosion length and distance from explosion centre. Thereafter, the obtained results are combined with the SDOF model of the blast wall to determine the ductility ratio and the damage. By using advanced optimisation techniques, two types of predictive models are found. In the first model, the formula is found in terms of 2 parameters of explosion length and distance from explosion centre. However, the 2nd model has 3 parameters of explosion length, distance, and also the natural period of the blast wall. These predictive models are then used to find explosion damages and ductility ratio. The results are compared with FEM analysis and pressure-impulse (P-I) method. It is shown that both types of models fit well with the outputs of the simulation. Moreover, results of both models are close to FEM analysis. The comparison tables provided in this paper show that, in the asymptotic region of P-I diagrams, results are not accurate. Therefore, this new method is superior to classical pressure-impulse (P-I) diagrams in the literature. Advantage of the new method is the easy damage assessment by using simple empirical-type formulas. Therefore, the researchers can use the method in this paper, for damage assessment in other types of blast resistive structures.

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“…A nonlinear predictive model with three parameters R 0 , R s (explosion related), and T in (14) which are blast wall related can be suggested as in the following form:…”

Section: Model With Three Parametersmentioning

confidence: 99%

“…Both SDOF-type model [12] and continuous beam model [13] are used for developing P-I diagrams. Recently, it is shown that batch finite element simulations [14] cannot lead to P-I diagram unless preliminary information regarding SDOF parameters is available.…”

Section: Introductionmentioning

confidence: 99%

A Predictive Model for Damage Assessment and Deformation in Blast Walls Resulted by Hydrocarbon Explosions

Aleyaasin

2019

Advances in Civil Engineering

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“…Hence further linear dynamic analysis were conducted without any non-linearity effects (Hedayati, M. H. et al 2014), which confirmed that the maximum response is not sensitive to load duration and that the response of the structure is less dynamic. The influence of dynamic effects on the response of these structures was studied in Hedayati et al (2018), where it was observed that the structural response for a wide range of profiled blast walls was mainly quasi-static or static, as opposed to dynamic. The present paper utilises this understanding to develop a novel performance-based design approach and associated framework using probabilistic reliability results based on enhanced automated FEA models.…”

Section: Introductionmentioning

confidence: 99%

Performance-based design of stainless steel profiled barrier blast walls

Hedayati

Sriramula

Neilson

2020

Ships and Offshore Structures

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Structural collapse and failures in recent events have uncovered the problem of current design procedures and confirmed the need for new methods and approaches for performance evaluation and design. The main issue is the appropriate consideration and treatment of the various uncertainties in the explosion loadings and the complex blast wall behaviour, considering dynamic and nonlinearity effects in the evaluation and assessment process. To capture these uncertainties or associated effects in the design of profiled barrier blast walls, a new methodology needs to be introduced and developed to perform probabilistic reliability assessment. However, to consider the reliability approach in the design of blast walls appropriately, a performance-based assessment method is required. Therefore, this study presents a framework for performance-based assessment of stainless steel profiled barrier blast walls. Initially, by using the enhanced APDL finite element modelling programming package, a blast wall with consideration of upper and lower connections is developed.Various uncertainties in explosion loadings, material and section properties are considered in the probabilistic assessments. For the performance-based design, performance levels of the blast wall structures are studied at serviceability, damage control and collapse prevention levels. The design criteria and the maximum allowable response values are initially specified to be investigated and discussed and in later stages optimal response target values are proposed for performance-based assessment under various probabilistic explosion loadings (i.e. hazards).

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Dynamic behaviour of unstiffened stainless steel profiled barrier blast walls

Cited by 2 publications

References 14 publications

A Predictive Model for Damage Assessment and Deformation in Blast Walls Resulted by Hydrocarbon Explosions

A Predictive Model for Damage Assessment and Deformation in Blast Walls Resulted by Hydrocarbon Explosions

Performance-based design of stainless steel profiled barrier blast walls

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