Experimental and numerical investigations on damage assessment of high-density polyethylene pipe subjected to blast loads

Wu, Tingyao; Jiang, Nan; Zhou, Chuanbo; Luo, Xuedong; Li, Haibo; Zhang, Yuqi

doi:10.1016/j.engfailanal.2021.105856

Cited by 30 publications

(8 citation statements)

References 41 publications

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“…To simplify the modeling process, the *MAT_PLASTIC_KINEMATIC material model is used to simulate the equivalent stiffness model of sleepers according to the method of equivalent modulus of reinforced concrete described by (Wang and Gong, 2018;Wu et al, 2022b). Material model parameters for rail, sleeper, and ballast bed (SPH element) as shown in Table 3 The tunnel lining is reinforced concrete material.…”

Section: > > > mentioning

confidence: 99%

“…Although, the shield machine has been widely adopted in the urban subway tunnel excavation, the drilling and blasting method also play a key role in the excavation of hard rock tunnel (Wu et al, 2022a). In the meantime, the blasting vibration caused by this method would induce the failure of the adjacent structures (Anas and Alam, 2022a; Wu et al, 2022b; Zhao et al, 2022; Zhu et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Safety assessment for a ballast railway induced by underground subway tunnel blasting: A case study

Jiang

Zhou

Yao

et al. 2023

International Journal of Protective Structures

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Modern railroad infrastructure is subject to blast vibrations. The dynamic safety of an operating railroad under the influence of tunnel blasting is a primary problem for metro development in urban areas. In this paper, the blasting excavation of Wuhan Metro Line 5 was selected as a case. The ballast rail- sleeper- ballast bed composite structure numerical model was developed and validated in order to evaluate the ballast railway’s safety. The smoothed particle hydrodynamics element was chosen to replicate the ballast bed due to the instability and unpredictability of the ballast bed constructed from crushed stone. Further analysis was conducted on the dynamic response characteristics of the ballast rail-sleeper-ballast bed composite structure. On the basis of the parameter calculation and analysis, a prediction model of the blast vibration velocity of the ballast rail under blasting conditions was developed. Next, the rail was simulated as a semi-infinite Euler beam and placed on the Kelvin foundation to calculate the rail displacement at the train’s limited operation speed. By substituting the maximum rail displacement when the train is running at maximum speed into the rail velocity prediction model, it is possible to determine the maximum blast velocity that the rail can withstand in this instance. In this case, the ballast bed, sleeper, and ballast rail were also deemed safe.

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Section: > > > mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Safety assessment for a ballast railway induced by underground subway tunnel blasting: A case study

Jiang

Zhou

Yao

et al. 2023

International Journal of Protective Structures

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“…In this model, the longitudinal wave velocity of rock mass C = 4200 m/s, the main vibration frequency f = 42 Hz-82 Hz, so the calculated wavelength is equal to 51 m-100 m. The maximum mesh size of the model is 0.16 m, less than 1/10 of the wavelength, which meets the requirements. At the same time, in order to meet the propagation characteristics of vibration waves in semi-infinite space, the upper surface of the numerical model is set as free boundary, and the surrounding and bottom are set as non-reflect boundary (Wu et al, 2022).…”

Section: Numerical Calculation Modelmentioning

confidence: 99%

Dynamic response and safety control of civil air defense tunnel group during the whole process of underpass tunnel blasting excavation

Yang

Jiang

Zhou

et al. 2022

International Journal of Protective Structures

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To ensure the safety and stability of adjacent underground structures is a key problem for the subway tunnel blasting construction. In this paper, there is a tunnel group (Sheshan civil air defense engineering) composed of several tunnel units right above a subway tunnel under blasting construction (Wuhan Metro Line 5). The vibration of the tunnel group induced by two blasting excavations of the subway tunnel was monitored. For further research, an effective 3D numerical model established by LS-DYNA, which was verified by field monitoring data, was used to analyze the dynamic response of the tunnel group in the whole process of the subway tunnel blasting. According to the numerical simulation results, the dynamic response characteristics of each tunnel unit were studied, and the most vulnerable area in each tunnel unit was determined. Then, the functional relationships between the maximum vibration velocities and the maximum tensile stresses of the vulnerable areas were established. Based on the maximum tensile stress criterion, the safety vibration velocity threshold of each vulnerable area was calculated using the relationship models. Furthermore, for convenient field monitoring during the subway construction, the safety vibration threshold at the floor of the tunnel group was also calculated. Lastly, to obtain the maximum charge per delay, five cut blasting with different charges were simulated. The maximum charge of the cut blasting in different stages of the subway tunnel blasting excavation was proposed. The research results of this paper have reference value for the blasting vibration safety control of similar tunnel excavation projects in the future.

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“…Their findings reveal that the implementation of blast-resistant panels significantly mitigates the propagation of acceleration, with the most favorable outcomes achieved through the utilization of thicker panels and lower explosion loads. In a separate study, Wu et al [ 27 ] inspect the vibrational response of subterranean thin-walled structures subjected to surface blast loads by employing numerical simulations. The researchers observe an increase in peak velocity as the proximity to the explosion source decreases, with a predominance of vertical vibrations.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Vibration Characteristics of Thin-Walled Steel Structures under Shock Waves

Wang

et al. 2023

Materials

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Thin-walled steel structures, prized for their lightweight properties, material efficiency, and excellent mechanical characteristics, find wide-ranging applications in ships, aircraft, and vehicles. Given their typical role in various types of equipment, it is crucial to investigate the response of thin-walled structures to shock waves for the design and development of innovative equipment. In this study, a shock tube was employed to generate shock waves, and a rectangular steel plate with dimensions of 2400.0 mm × 1200.0 mm × 4.0 mm (length × width × thickness) was designed for conducting research on transient shock vibration. The steel plate was mounted on an adjustable bracket capable of moving vertically. Accelerometers were installed on the transverse and longitudinal symmetric axes of the steel plate. Transient shock loading was achieved at nine discrete positions on a steel plate by adjusting the horizontal position of the shock tube and the vertical position of the adjustable bracket. For each test, vibration data of eight different test positions were obtained. The wavelet transform (WT) and the improved ensemble empirical mode decomposition (EEMD) methods were introduced to perform a time-frequency analysis on the vibration of the steel plate. The results indicated that the EEMD method effectively alleviated the modal aliasing in the vibration response decomposition of thin-walled structures, as well as the incompletely continuous frequency domain issue in WT. Moreover, the duration of vibration at different frequencies and the variation of amplitude size with time under various shock conditions were determined for thin-walled structures. These findings offer valuable insights for the design and development of vehicles with enhanced resistance to shock wave loading.

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Experimental and numerical investigations on damage assessment of high-density polyethylene pipe subjected to blast loads

Cited by 30 publications

References 41 publications

Safety assessment for a ballast railway induced by underground subway tunnel blasting: A case study

Safety assessment for a ballast railway induced by underground subway tunnel blasting: A case study

Dynamic response and safety control of civil air defense tunnel group during the whole process of underpass tunnel blasting excavation

Investigation on Vibration Characteristics of Thin-Walled Steel Structures under Shock Waves

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