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作者:

Zhou, Longyun (Zhou, Longyun.) | Li, Xiaojun (Li, Xiaojun.) (学者:李小军) | Yan, Qiushi (Yan, Qiushi.)

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EI Scopus SCIE

摘要:

Marine reinforced concrete constructions (suspended tunnels, undersea pipelines, and cross-sea bridges) are inherently at risk from underwater explosions due to the rising incidence of worldwide terrorism. Sea-crossing bridges are as an important land-sea connection channel, whose anti-explosion performance cannot be ignored. In this paper, the dynamic response and damage mechanism of piers of sea-crossing bridge under underwater explosion loads are studied by the arbitrary Lagrangian-Eulerian (ALE) method. Firstly, the correctness of the explosive load and reinforced concrete material models is verified by the Zamyshlyaev formula and underwater explosion test, respectively. Secondly, the finite element (FE) model of a pier under an underwater explosion load is established. Taking the residual vertical bearing capacity of the pier as the performance index, the damage evaluation method and four damage levels of the pier under explosion load are put forward. The study of different parameters such as explosive weight, explosion location, explosion height, and explosion distance shows that the damage to the pier is the most serious when the detonation point is directly below the projection of the pier cap. The residual bearing capacity of the pier falls exponentially as explosive weight increases. Different detonation heights have significant effects on the damage to the pier. Additionally, it is found using the explosion vulnerability analysis approach that the pier is very susceptible to collapse when the explosive weight is 350 kg.

关键词:

Underwater explosion Anti-explosion performance Explosive vulnerability Bridge pier Damage assessment

作者机构:

  • [ 1 ] [Zhou, Longyun]Beijing Univ Technol, Beijing 100124, Peoples R China
  • [ 2 ] [Li, Xiaojun]Beijing Univ Technol, Beijing 100124, Peoples R China
  • [ 3 ] [Yan, Qiushi]Beijing Univ Technol, Beijing 100124, Peoples R China
  • [ 4 ] [Zhou, Longyun]Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China
  • [ 5 ] [Yan, Qiushi]Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China
  • [ 6 ] [Li, Xiaojun]Inst Disaster Prevent, Sanhe Hebei 065201, Peoples R China

通讯作者信息:

  • [Li, Xiaojun]Beijing Univ Technol, Beijing 100124, Peoples R China;;[Yan, Qiushi]Beijing Univ Technol, Beijing 100124, Peoples R China;;

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来源 :

ENGINEERING FAILURE ANALYSIS

ISSN: 1350-6307

年份: 2023

卷: 155

4 . 0 0 0

JCR@2022

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