Numerical study on dynamic response of a novel ribbed thin-walled UHPC box-type utility tunnel under gas explosion
Source abstract
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 flexure-shear 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.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Structural Response to Dynamic Loads · Combustion and Detonation Processes · Geophysical Methods and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (44)
Show source-provided references
1. Ignition behavior and the onset of quasi-detonation in methane-oxygen using different end wall reflectors10.1016/j.ast.2021.106873 ↗
2. Suppression effect of porous media on natural gas explosion in utility tunnels10.1016/j.firesaf.2021.103522 ↗
3. Numerical simulation of overpressure loads generated by gas explosions in utility tunnels10.1016/j.psep.2022.03.014 ↗
4. Effect of fiber content on mechanical performance and cracking characteristics of ultra-high-performance seawater sea-sand concrete (UHP-SSC)10.1177/1369433220972452 ↗
5. Research progress on impact resistance of ultra-high performance concrete
6. Behavior of portable fiber reinforced concrete vehicle barriers subject to blasts from contact charges10.1016/j.ijimpeng.2009.11.004 ↗
7. Blast resistance characteristics of concrete with different types of fibre reinforcement10.1002/suco.201400080 ↗
8. Experimental and numerical analyses of long carbon fiber reinforced concrete panels exposed to blast loading10.1016/j.ijimpeng.2013.01.006 ↗
9. Response of normal-strength and ultra-high-performance fiber-reinforced concrete columns to idealized blast loads10.1016/j.engstruct.2014.01.015 ↗
10. Behavior of ultra-high performance fiber reinforced concrete columns under blast loading10.1016/j.ijimpeng.2015.02.006 ↗
11. An experimental and numerical study of reinforced ultra-high performance concrete slabs under blast loads10.1016/j.matdes.2015.05.045 ↗
12. Mechanical and structural behaviors of ultra-high-performance fiber-reinforced concrete subjected to impact and blast10.1016/j.conbuildmat.2017.05.136 ↗
13. Response of small scale ultra high performance fibre reinforced concrete slabs to blast loading10.1016/j.conbuildmat.2015.05.085 ↗
14. Experimental and numerical studies on dynamic behavior of reinforced UHPC panel under medium-range explosions10.1016/j.ijimpeng.2020.103761 ↗
15. A study of pressure characteristics of methane explosion in a 20 m buried tunnel and influence on structural behaviour of concrete elements10.1016/j.engfailanal.2021.105273 ↗
16. Steel/basalt rebar reinforced Ultra-High Performance Concrete components against methane-air explosion loads10.1016/j.compositesb.2020.108215 ↗
17. Dynamic response and performance of submarine tunnel subjected to surface explosions10.1016/j.marstruc.2021.103091 ↗
18. Turbulent burning velocities: a general correlation in terms of straining rates
19. Contribution of direct numerical simulation to understanding and modelling turbulent transport
20. Large eddy simulation with modeled wall-stress: recent progress and future directions10.1299/mer.15-00418 ↗
21. Application of the energy-dissipation model of turbulence to the calculation of flow near a spinning disc10.1016/0094-4548(74)90150-7 ↗
22. Reassessment of the scale-determining equation for advanced turbulence models10.2514/3.10041 ↗
23. Comparison of k-ε models in gaseous release and dispersion simulations using the CFD code FLACS10.1016/j.psep.2019.08.016 ↗
24. Computer modelling of gas explosion propagation in offshore modules10.1016/0950-4230(92)80020-9 ↗
25. Recent application of Computational Fluid Dynamics (CFD) in process safety and loss prevention: a review10.1016/j.jlp.2020.104252 ↗
26. Gas explosions of methane-air mixtures in a large-scale tube10.1016/j.fuel.2020.119239 ↗
27. Gexcon A.S.. FLACS v10.6 User`s Manual[M]. Norway: Gexon, 2017.
28. Modelling of vented gas explosions in the CFD tool FLACS
29. Protective effect of unbonded prestressed ultra-high performance reinforced concrete slab against gas explosion in buried utility tunnel10.1016/j.psep.2020.11.002 ↗
30. Measurement of basic physical parameters of steel concrete interface
31. Bond-slip in reinforced concrete elements10.1061/(ASCE)0733-9445(2005)131:11(1690) ↗
32. C.E.B. CEB-FIP model code 1990[S]. Lausanne: Bulletin Information, 1993.
33. Prediction of blast response of RC columns considering dynamic bond-slip between reinforcement and concrete10.1016/j.engstruct.2023.115921 ↗
34. Projectile impact resistance of fibre-reinforced geopolymer-based ultra-high performance concrete (G-UHPC)10.1016/j.conbuildmat.2021.123189 ↗
35. Calibration of KCC model for UHPC under impact and blast loadings10.1016/j.cemconcomp.2021.104401 ↗
36. Review of static and dynamic properties of steel reinforcing bars
37. Mesoscale study of steel fibre-reinforced ultra-high performance concrete under static and dynamic loads10.1016/j.matdes.2016.12.027 ↗
38. The influence of steel fibres on compressive and tensile strength of ultra-high performance concrete: A review10.1016/j.conbuildmat.2020.119459 ↗
39. Flexural behaviour and cost effectiveness of layered UHPC-NC composite beams10.1016/j.engstruct.2022.115060 ↗
40. Full-scale experimental verification of UHPC-RC composite slab culvert with a clear span of 8 m10.1061/(ASCE)BE.1943-5592.0001640 ↗
41. Experimental study on flexural performance of RC beams reinforced by prestressed UHPC
42. Design and behavior of super-long span cable-stayed bridge with CFRP cables and UHPC members10.1016/j.compositesb.2018.11.060 ↗
43. Numerical simulation of overpressure loads generated by gas explosions in utility tunnels10.1016/j.psep.2022.03.014 ↗
44. Departments of the Army the Navy, and the Air Force. UFC 3-340-02, Structures to Resist The Effects of Accidental Explosions[S]. Washington: U.S. Department of Defense, 2008.