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author:

Xia, Zhanghua (Xia, Zhanghua.) [1] (Scholars:夏樟华) | Li, Hui (Li, Hui.) [2] | Xie, Jun (Xie, Jun.) [3] | Zong, Zhouhong (Zong, Zhouhong.) [4] | Zhang, Zhijie (Zhang, Zhijie.) [5]

Indexed by:

EI Scopus SCIE

Abstract:

At present, RC utility tunnels are widely used in urban utility tunnels. As a typical confined space, the complex load effect generated by the internal gas explosion of the gas tank of utility tunnel may lead to local damage or overall destruction of the structure of RC utility tunnel. Therefore, it is an important topic to improve the anti-explosion capability of the utility tunnel and ensure the normal operation of the utility tunnel after gas explosion. UHPC structure is considered to have excellent anti-explosion performance, so a ribbed thin-walled UHPC utility tunnel structure was proposed, which improved the overall stiffness and anti-explosion performance of the UHPC utility tunnel through the ribbed section. In view of the shortcomings of fluid-solid coupling method in gas simulation, Computational Fluid Dynamics (CFD) was used to calculate the overpressure distribution after gas explosion in UHPC utility tunnel. The accuracy of UHPC constitutive model and prestress simulation method was verified by testing results from the gas explosion on unbonded prestressed UHPC slab. The gas explosion damage mechanism of ribbed thin-walled UHPC utility tunnel, UHPC-NC combined utility tunnel and RC utility tunnel were comparatively analyzed. And the pre-fabricated stiffener height, UHPC slab thickness and UHPC strength were investigated on the anti-explosion performance of ribbed thin-walled UHPC utility tunnel against gas explosion. It is found that the UHPC strength needs to be enhanced dramatically to improve the blast resistance. The anti-explosion capability of utility tunnel can be effectively increased by increasing the rib height or increasing the thickness of the UHPC utility tunnel structure, and the damage pattern of the utility tunnel can also be changed from flexureshear failure to bending failure. The results of the study can provide a reference for the damage analysis and anti-explosion design of ribbed thin-walled UHPC utility tunnels.

Keyword:

Ant-explosion Capability Gas Explosion Thin-walled UHPC Utility Tunnel

Community:

  • [ 1 ] [Xia, Zhanghua]Fuzhou Univ, Dept Civil Engn, Fuzhou 350116, Peoples R China
  • [ 2 ] [Li, Hui]Fuzhou Univ, Dept Civil Engn, Fuzhou 350116, Peoples R China
  • [ 3 ] [Xie, Jun]Fuzhou Univ, Dept Civil Engn, Fuzhou 350116, Peoples R China
  • [ 4 ] [Zhang, Zhijie]Fuzhou Univ, Dept Civil Engn, Fuzhou 350116, Peoples R China
  • [ 5 ] [Zong, Zhouhong]Southeast Univ, Dept Civil Engn, Nanjing 210096, Jiangsu, Peoples R China

Reprint 's Address:

  • [Xia, Zhanghua]Fuzhou Univ, Dept Civil Engn, Fuzhou 350116, Peoples R China;;

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Source :

CASE STUDIES IN CONSTRUCTION MATERIALS

ISSN: 2214-5095

Year: 2024

Volume: 21

6 . 5 0 0

JCR@2023

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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