Jie Liu’s research while affiliated with Panzhihua University and other places

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Publications (4)


Experimental investigation of flood hydrograph induced by landslide dam breach based on transient surface velocity measurement
  • Article

September 2022

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29 Reads

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1 Citation

Arabian Journal of Geosciences

Jie Liu

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Hong Xiao

The large-scale particle image velocimetry (LSPIV) technique was regarded as a novel approach for estimating dam breach discharge in recent years. In order to investigate its advantages and disadvantages in the estimation of the dam breach hydrograph, the landslide dam breach experiments were conducted in a large width flume (4 m wide), and the relationship between the breach discharge and the surface velocity during the dam break process was also discussed. It was found that the LSPIV approach showed improved accuracy over the conventional volume conservation method in the estimation of the dam breach hydrograph, and the LSPIV approach was capable of capturing the prompt response of the hydrograph to the abrupt breach channel enlargement caused by the lateral collapse. To eliminate the error induced by the logarithmic approximation, the discharge obtained by the LSPIV approach at each time step should multiply a uniform factor of 1.08, which was proposed based on the total mass conservation concept. The methodology established in this study can be extended to measure the hydrograph of a prototype-scale dam breach flow, which is important for disaster mitigation but only difficult to measure in the field.


Diagrams of the experimental setups for the dam breach experiments
Time snapshots of the dam breach formation process
Example of surface velocity field in the breach channel using LSPIV
Time history of the water depth in the reservoir and the dam breach hydrograph estimated using the water depth
Time history of the surface velocity at the front dam toe that is estimated using the LSPIV method. The dots were the results by LSPIV, and the solid line was the trend line

+8

Effect of vertical velocity profile approximations on estimates of dam breach discharge using surface velocities
  • Article
  • Full-text available

June 2021

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90 Reads

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3 Citations

Jie Liu

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Hong Xiao

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[...]

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Wei Wang

In order to investigate the relationship between water surface velocity and breach hydrograph, a series of dam breach experiments with a generalised landslide dam were conducted in an open channel of 50 m × 4 m × 2 m. The large‐scale particle image velocimetry (LSPIV) technique was applied to measure the time history of water surface velocity during the dam breach process, and the hydrography was obtained by integrating the surface velocity along the water depth. The influence of different vertical velocity profile approximation and suspended sediment concentration on the peak breach discharge were analysed and discussed. The results showed that the water depth over the breach crest can be described as a function of water surface velocity using . A simple formula based on surface velocity and breach width for the estimation of breach discharge was further proposed and verified.

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Experimental Study of Landslide Surge Wave Overtopping an Earth Dam

September 2020

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22 Reads

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4 Citations

Arabian Journal for Science and Engineering

In this study, the experimental investigation on whether the landslide surge waves can influence the dam failure process caused by flood overtopping was presented. The experiments were conducted in a large width flume with length of 50 m, width of 4 m and height of 2 m. The time between the start of the earth dam break and the surge wave reaching the dam site was set to 80 s. During this period, the water depth of the reservoir constantly decreased. The experimental results showed that the surge wave height decreased while the propagation velocity increased slightly as the surge moved to the dam site. Several surge waves could overtop the dam crest and the shear height of the dam crest caused by each surge wave was a function of the surge wave height, which could be described non-dimensionally by Δz* = 0.946 Hs*2.113. The surge wave influenced the water level falling velocity and breach width expanding speed from the time of the overlay of the breaking dam. The surge wave could lead to a large instantaneous peak discharge that exceeded the dam failure peak discharge of the experiments with no surge wave.


Studies on the RC Beam Strengthened by Using the Exterior-Wrapping U-Shaped Steel Plate and Its Application

April 2019

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722 Reads

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9 Citations

Based on practical frame structures, constructional methods of the reinforced concrete (RC) frame beam strengthened by using an exterior-wrapping U-shaped steel plate are introduced. With reference to the code for design of strengthening concrete structure , the bearing capacity formula of the RC frame beams strengthened by using the exterior-wrapping U-shaped steel plate is briefly derived. After that, the finite element analysis of the frame beam before and after the reinforcement of the engineering example is carried out through ABAQUS software, and the results of the analysis of the bearing capacity are compared with the calculation results of the theoretical formula. At the same time, through comparing and analysing the U-shaped steel plate strengthening method and the “angle steel + batten plate” strengthening method, the result that the RC beam strengthened by using the exterior-wrapping U-shaped steel plate has better mechanical performance is drawn. Finally, the application of the exterior-wrapping U-shaped steel plate strengthening method is rationally suggested.

Citations (2)


... After the formation of a barrier lake, aftershocks, floods induced by intensive rainfall, and surges induced by landslides and debris flows in the reservoir area would further erode landslide dams and accelerate the process of overtopping erosion (Shi et al. 2015a(Shi et al. , 2015bLiu et al. 2021;Peng et al. 2021). Aftershocks could cause cracks and settlement in landslide dams and evolve with overflow scouring. ...

Reference:

A review of the research on the failure potential of landslide dams caused by overtopping and seepage
Experimental Study of Landslide Surge Wave Overtopping an Earth Dam
  • Citing Article
  • September 2020

Arabian Journal for Science and Engineering

... Unlike conventional steel reinforcements, which can be bulky, these thin layers offer the potential to improve structural strength while minimizing changes to the existing design. Over the past few decades, engineers have explored various techniques to meet these challenges, including concrete jacketing, external steel reinforcement, and the use of Fiber-reinforced polymers (FRP) (Raval & Dave, 2013;Yoshitake et al., 2020;Zhou et al., 2019). In recent years, Fiber-reinforced polymers (FRP) have gained attention as a promising alternative to conventional techniques like concrete jacketing and external steel reinforcement. ...

Studies on the RC Beam Strengthened by Using the Exterior-Wrapping U-Shaped Steel Plate and Its Application