Analytical solution of the dynamic response of buried pipelines under blast wave

Abedi, Amir Sajjad; Hataf, Nader; Ghahramani, A.

doi:10.1016/j.ijrmms.2016.07.014

Cited by 50 publications

(13 citation statements)

References 4 publications

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“…e PVC tubes were thin and of low strength and thus had little e ect on the experimental results. e square tubes were simply supported on a bracket [2,[6][7][8]. e contact area between the square tube and the bracket was kept small enough to ensure that this contact area had little in uence on the experimental results.…”

Section: Methodsmentioning

confidence: 99%

“…Kim et al [5] investigated energy absorption capability and bending collapse behaviour of an aluminium (Al)/carbon fiber reinforced plastic (CFRP) short square hollow section (SHS) beam under transverse quasistatic loading. Abedi et al [6] found the pipe displacement and peak particle velocity under a blast wave equivalent dynamic load by establishing a mathematical model. Wu et al [7] conducted experimental and numerical studies on the dynamic response of metal cylindrical shells under the combined effects of fragments and shock waves and obtained three failure modes.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation on the Deformation and Fracture of Steel Square Tubes under Double‐Explosion Loadings

Zhou

et al. 2018

Shock and Vibration

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The experimental investigations on the square tubes with various stand-off distances and wall thickness were helpful to understand the dynamic response of metal shell under single and double explosion. Therefore, the effect of stand-off distance, wall thickness, and amounts of explosion on the deformation and damage of the square tubes and the regular pattern of the fracture development was analyzed by dimensions of local plastic deformation, volume of the depression area, and crack type. The result reveals that the deformation and fracture mode of steel square tubes gradually transform from local deformation to rupture with the decrease of wall thickness and stand-off distance. Besides, the failure degrees of square tubes under a double explosion were relatively higher than those of square tubes under a single explosion. In addition, the experiment indicates that the side corners of the square tube are very vulnerable, and they are damaged easily by the stress concentration and shear effect. The conclusion provides an important scientific basis for the structural design of square-tube structures and calculation of engineering protection.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Deformation and Fracture of Steel Square Tubes under Double‐Explosion Loadings

Zhou

et al. 2018

Shock and Vibration

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“…From an engineering perspective, horizontal excitation is very important, especially for some geotechnical works, such as the dynamic installation of a pipe segment using underground trenchless technology (Figure 1). Many attempts to measure the influence of underground works on existing infrastructure have been made and reported in the course of large infrastructural projects, mainly including tunnelling works [22][23][24]. The impact of dynamic guided jacking is often considered "less important", which is why there is a lack of research on this type of excitation.…”

Section: Introduction: the Importance Of The Analysed Problemmentioning

confidence: 99%

On a Sensor Placement Methodology for Monitoring the Vibrations of Horizontally Excited Ground

Herbut

Rybak

Brząkała

2020

Sensors

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In this paper, the problem of optimal sensor arrangement during vibration monitoring is analysed. The wave propagation caused by horizontal excitation is investigated to predict the areas of the largest ground and structure response. The equations of motion for a transversally isotropic elastic medium with appropriate absorbing boundary conditions are solved using the finite element method (FlexPDE software). The possibility of an amplified soil medium response is examined for points located on the ground surface and at various depths. The results are presented in the form of a dimensionless vibration reduction factor, defined as the ratio of the peak particle velocity observed at the selected depth to the corresponding value observed at the ground surface. Significant amplifications (≈50%) can be observed below the ground surface, especially in the case of a weak layer below a stiff layer. The effect of vibration amplification is most significant near the boundary surface of two layers. For the points located on the ground surface, the greatest peak particle velocities are observed in the direction perpendicular to the load direction. However, the greatest vertical velocity component at the ground surface is observed in front of the applied force.

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“…To date, many experts and scholars have studied the allowable vibration velocity criterion of buried pipelines under the impact of blast waves. The recommended ground peak particle velocity (GPPV) safety criterion ranges from 2.0 cm/s to 15 cm/s with a wide span [25][26][27][28][29]. In actuality, the difference in the responses of different pipes subjected to the same blast wave may be very large due to varying materials and types of pipe.…”

Section: Introductionmentioning

confidence: 99%

“…Examples of representative research on buried pipelines subjected to the impact of blast waves include the following: Dowding's calculation formula, which is derived from a plane wave with constant amplitude, whose calculation result can be used as the upper limit of the response of buried pipelines under far-field plane waves [30]; and the empirical formulas proposed by Esparza et al based on model and field test data, which require applicable site conditions and experimental environments [28]. There are also two typical semi-theoretical, semi-empirical formulas: One by Kouretzis et al, which is based on the harmonic assumption and uses a thin shell cylindrical model [31], and another by Abedi et al, which is based on the law of pressure attenuation of blast waves and uses the beam model on elastic foundation [29]. In these two formulas, the blast wave and pipe were simplified by different types, and therefore, their applications require further investigation and analysis.…”

Section: Introductionmentioning

confidence: 99%

Monitoring the Dynamic Response of a Buried Polyethylene Pipe to a Blast Wave: An Experimental Study

et al. 2019

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Although the use of polyethylene (PE) pipelines has become increasingly widespread in recent years, few studies have addressed their seismic design and ability to withstand blast waves. In order to establish their seismic capacity, the dynamic response of buried pipelines subjected to blast waves must be explored in depth. Here, we studied the dynamic response of PE pipes situated near an explosive source. Time histories of dynamic strains were measured by conventional strain gauges after simple waterproof treatment, and pipe and ground vibration velocity curves were obtained. Based on the experimental data, the attenuation law of the peak strains under the conditions of different charge masses and blast center distances was analyzed, and the spectrum characteristics of strain, velocity of the pipe, and ground velocity were studied. The results revealed that a large hoop strain on the PE pipes was produced due to the local impact near the explosive source. We found that peak hoop strain (PHS) or peak axial strain (PAS) had a power attenuation relationship with the scaled distance, and this relationship could also be derived by dimensional analysis. The average frequency of strains had the same attenuation form as the charge mass, which was between 10 Hz and 50 Hz. Additionally, the vibration of the pipe showed a low frequency. We also determined that the attenuation of the average frequency of pipe and ground vibration velocity was closely related to the charge mass and the scaled distance. Pipe peak vibration velocity (PPVV), ground peak particle velocity (GPPV), and the peak dynamic strain of pipe were highly positively correlated, which verifies the feasibility of using GPPV to characterize pipeline vibration and strain level. Thus, a blasting criterion of 10% minimum request strength (MRS) for PE pipe was proposed, which means that the additional PHS or PAS of the dangerous point must be less than 10% MRS, and we also propose limiting the safety distance–charge mass for blasts near buried PE pipelines by the criterion. Some results in this paper can serve as the basis for future in-depth theoretical research.

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Analytical solution of the dynamic response of buried pipelines under blast wave

Cited by 50 publications

References 4 publications

Experimental Investigation on the Deformation and Fracture of Steel Square Tubes under Double‐Explosion Loadings

Experimental Investigation on the Deformation and Fracture of Steel Square Tubes under Double‐Explosion Loadings

On a Sensor Placement Methodology for Monitoring the Vibrations of Horizontally Excited Ground

Monitoring the Dynamic Response of a Buried Polyethylene Pipe to a Blast Wave: An Experimental Study

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