A study of RC bridge columns under contact explosion

Yuan, Sujing; Hao, Hong; Zong, Zhouhong; Li, Jun

doi:10.1016/j.ijimpeng.2017.07.017

Cited by 78 publications

(23 citation statements)

References 31 publications

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“…Further numerical investigations undertaken to explain this phenomenon attributed this to displacement differentials that were a result of the interaction of the shock wave with the column. The experimental and numerical study undertaken by Yuan et al 13 pertaining to contact explosions has also arrived at similar conclusions. Additionally, it was also observed that while the concrete cover on the proximal face failed primarily due to the compressive stress wave, the damage sustained on the side and distal faces was due to the tensile stress wave 13 .…”

Section: Introductionsupporting

confidence: 55%

“…The experimental and numerical study undertaken by Yuan et al 13 pertaining to contact explosions has also arrived at similar conclusions. Additionally, it was also observed that while the concrete cover on the proximal face failed primarily due to the compressive stress wave, the damage sustained on the side and distal faces was due to the tensile stress wave 13 . The shape of the column was also noted to be another important factor in characterizing the level of sustained damage 13 .…”

Section: Introductionsupporting

confidence: 55%

“…Additionally, it was also observed that while the concrete cover on the proximal face failed primarily due to the compressive stress wave, the damage sustained on the side and distal faces was due to the tensile stress wave 13 . The shape of the column was also noted to be another important factor in characterizing the level of sustained damage 13 . Moreover, numerical investigations have also been conducted by Liu et al 14 to study the effect of explosion height (blast center at the top, bottom and mid height of the pier) for a noncontact type explosion in characterizing the response of the column.…”

Section: Introductionmentioning

confidence: 99%

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Response characterization of highway bridge piers subjected to blast loading

Patel

Goswami

Adhikary

2020

Structural Concrete

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Recent attacks on a number of bridges demonstrate clear evidence of the vulnerability characterizing transportation systems to terrorist attacks. This vulnerability being further enhanced by the fact that the security measures implemented for the highway bridges are often not at par with those in place for the milestone bridges. This has necessitated studies to effectively characterize the response of highway bridge piers subjected to blast loads. The study, presented here, concentrates on investigating the effects of various parameters such as scaled distance, blast type, axial load ratio, and reinforcement detailing in assessing the response of reinforced concrete bridge piers that form the part of a two span highway bridge. The analysis of the bridge was carried out in accordance with IRC 6:2017. It was observed that at lower scaled distances, the burst type and the axial load ratio significantly affect the response of the pier. For a constant ALR value of 0.15, a 91.55% reduction in the peak displacement value was observed on increasing the scaled distance from 0.5 to 1 m/kg1/3. Furthermore, for the conventionally detailed piers, an increase in the ALR value at a scaled distance of 0.5 m/kg1/3 was observed to be characterized by catastrophic failure due to the buckling of the longitudinal rebar on account of crushing of the compression concrete. Seismic detailing was also found to significantly improve the response of the columns, scilicet the use of seismic detailing, was noted to significantly reduce the peak displacement (~ 40%).

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Section: Introductionsupporting

confidence: 55%

Section: Introductionsupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

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Response characterization of highway bridge piers subjected to blast loading

Patel

Goswami

Adhikary

2020

Structural Concrete

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“…Since both MAT_072_RL3 and MAT002 have no built-in failure criteria, we have used an erosion criteria based on maximum principal strain in the model. Based on previously performed studies (Cui et al 2015;Lim et al 2016;Mutalib and Hao 2011;Yuan et al 2017), a value of 0.15 for concrete and 1.1 for FRP was chosen for the model.…”

confidence: 99%

Numerical Simulation of Reinforced Concrete Columns in Mid-Rise Buildings Subjected to Close by Blast Loading

Pathak¹,

Raman²,

Shestakova³

et al. 2020

Structures Congress 2020

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Ground floor reinforced concrete columns are vulnerable to blast loading of close by distance (i.e. less than 3 1/3 m/kg ). In this work, a 25-story commercial building was designed in lowseismic and high-seismic regions respectively to find the typical column dimensions and reinforcements. A finite element model was developed to simulate above mentioned blast loading scenarios and to evaluate effectiveness of FRP retrofit. The model was found to be adequate in capturing the trends of deformation and damages as expected and effectiveness of FRP in providing additional confinement. The qualitative results thus obtained are presented.Structures Congress 2020 Downloaded from ascelibrary.org by 44.224.250.200 on 07/16/20.

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“…Xia et al [15] analysed the ground vibrations of a water tunnel induced by excavation blasting through experiments and numerical methods. Additionally, Hao et al [16][17][18][19] performed numerous numerical studies on the dynamic responses and damage mechanisms of concrete structures under explosions using the arbitrary Lagrangian-Eulerian (ALE) technique in LS-DYNA and compared the results with field experiments to demonstrate the feasibility of the method. Yang et al [20] also utilized LS-DYNA to study the dynamic responses of operating metro tunnels subjected to ground explosions.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Dynamic Responses and Damage of Linings Subjected to Violent Gas Explosions inside Highway Tunnels

Cheng

et al. 2018

Shock and Vibration

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The linings of structures suffer severe damage when subjected to internal explosions, which cause numerous casualties and incalculable economic losses. In this paper, a violent gas explosion that occurred inside a highway tunnel in the city of Chengdu, China, is studied through numerical simulations. The evaluated energy of the gas explosion was equivalent to 2428.9 kg of TNT. A fully coupled numerical model consisting of five parts is established with dimensions consistent with the real prototype dimensions and by considering fluid-structure interaction (FSI) effects. Then, a detailed modelling process is presented and validated through a comparison with empirical formulas. This paper investigates the strength and propagation characteristics of a blast shock wave inside the tunnel, and both the effective stresses and dynamic responses of the lining are analysed under the blast impact loading. The damage mechanism is studied, and the evolution of the lining damage is reproduced, the results of which show good agreement with the actual conditions. Moreover, in terms of the responses and damage of the lining, the fully coupled blast loading model has obvious advantages in comparison with the simplified blast loading model. Furthermore, the damage assessment of the lining conducted using the single degree of freedom (SDOF) method agrees well with the results of the numerical simulation and site investigations. The comprehensive numerical simulation technique used in the present paper and its results could represent valuable references for future research on violent explosions within tunnels or very large underground structures and provide relevant information for the blast-resistant design of such structures.

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A study of RC bridge columns under contact explosion

Cited by 78 publications

References 31 publications

Response characterization of highway bridge piers subjected to blast loading

Response characterization of highway bridge piers subjected to blast loading

Numerical Simulation of Reinforced Concrete Columns in Mid-Rise Buildings Subjected to Close by Blast Loading

Numerical Investigation of the Dynamic Responses and Damage of Linings Subjected to Violent Gas Explosions inside Highway Tunnels

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