Experimental and Numerical Study of the Performance of Self-Centering Frame Structures Subjected to Debris-Flow Impacts

2021 ◽  
Vol 147 (11) ◽  
pp. 04021168
Author(s):  
Shiran Xu ◽  
Peizhen Li ◽  
Zheng Lu
Keyword(s):  
Debris Flow ◽  
Numerical Study ◽  
Frame Structures

NUMERICAL STUDY OF IMPACT FORCE CHARACTERISTICS OF DEBRIS FLOW

2020 ◽  
Vol 25 (4) ◽  
pp. 34-42
Author(s):  
S.G. Lee ◽  
S. Lee ◽  
J.Y. Lee ◽  
J.A. Um ◽  
W.H. Yi
Keyword(s):  
Debris Flow ◽  
Impact Force ◽  
Numerical Study ◽  
Force Characteristics

scholarly journals Tunneling-Induced Deformation of Bare Frame Structures on Sand: Numerical Study of Building Deformations

2021 ◽  
Vol 147 (11) ◽  
pp. 04021116
Author(s):  
D. Boldini ◽  
N. Losacco ◽  
A. Franza ◽  
M. J. DeJong ◽  
J. Xu ◽  
...  
Keyword(s):  
Numerical Study ◽  
Frame Structures

Numerical study on hydrodynamic load and vibration of pipeline exerted by submarine debris flow

2021 ◽  
Vol 239 ◽  
pp. 109754
Author(s):  
Enjin Zhao ◽  
Youkou Dong ◽  
Yuezhao Tang ◽  
Lan Cui
Keyword(s):  
Debris Flow ◽  
Numerical Study ◽  
Hydrodynamic Load

scholarly journals A Relative Reliability Approach for Direct Displacement-Based Seismic Design of Partially Prestressed Reinforced Concrete Frame Structures

2015 ◽  
Vol 2015 ◽  
pp. 1-10
Author(s):  
Bin Jian ◽  
Chaoyi Lei ◽  
Pingping Liao
Keyword(s):  
Reinforced Concrete ◽  
Numerical Study ◽  
Frame Structures ◽  
Risk Level ◽  
Earthquake Risk ◽  
Base Shear ◽  
Reinforced Concrete Frame ◽  
Relative Reliability ◽  
Concrete Frame ◽  
Displacement Based

A relative reliability approach for Direct Displacement-Based Design (DDBD) is first proposed in this paper, which is based on the average reliability level implicit in current Chinese design codes. By introducing a relative reliability coefficientα, the determination of reliability from DDBD is transformed to the calculation of its ratio to the average reliability of current Chinese codes. This approach not only follows the reliability principle of current Chinese codes, but also avoids the complex calculation of reliability in general. The calculation of reliability at any performance level can be transformed to the nominal reliability of frequent earthquake for the expected earthquake risk level. Meanwhile, based on the assumption of elasticity, it is shown that, under frequent earthquake risk, the calculated base shear derived from DDBD theoretically equals that from force-based design (FBD). Therefore, a revised calculation of section bearing capacity for DDBD, which follows the expression in current Chinese codes, is advised, according to the numerical study of 24 examples of Partially Prestressed Reinforced Concrete (PPRC) frame structures. Finally, this proposed approach is verified to be effective and superior by a comparative analysis of 10 examples of PPRC frames.

Numerical study on debris flow in step-pools channel using smoothed particle hydrodynamics method

2020 ◽  
Author(s):  
Shuai Li ◽  
Xiaoqing Chen ◽  
Chong Peng ◽  
Jiangang Chen
Keyword(s):  
Debris Flow ◽  
Smoothed Particle Hydrodynamics ◽  
Debris Flows ◽  
Impact Force ◽  
Numerical Study ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Smoothed Particle Hydrodynamics Method ◽  
The Impact ◽  
Peak Impact Force

<p>Drainage channel with step-pool systems are widely used to control debris flow. However, the blocking of debris flow often gives rise to local damage at the steps and baffles. Hence, the estimation of impact force of debris flow is crucial for design step-pools channel. This paper presents a numerical study on the impact behavior of debris flows using SPH (Smoothed Particle Hydrodynamics) method. Some important parameters, such as the baffle shape (square, triangle, and trapezoid) and the densities of debris flows are considered to examine their influence on the impact force. The results show that the largest peak impact force is obtained at the second last baffle, rather than the first baffle. Moreover, the square baffle gives rise to the largest impact force whereas the triangle baffle bears the smallest one among the three baffles. Generally, the peak impact force increases with increasing the inflow density. However, a threshold density, beyond which the peak impact force will decrease, is suggested by the simulations. Based on the numerical results, an improved expression to predict the impact force considering the inclined angle of baffle is proposed.</p>

Numerical study of granular debris flow run-up against slit dams by discrete element method

Landslides ◽  
2019 ◽  
Vol 17 (3) ◽  
pp. 585-595 ◽  
Author(s):  
Gordon G. D. Zhou ◽  
Junhan Du ◽  
Dongri Song ◽  
Clarence E. Choi ◽  
H. S. Hu ◽  
...  
Keyword(s):  
Debris Flow ◽  
Discrete Element Method ◽  
Numerical Study ◽  
Discrete Element ◽  
Run Up ◽  
Element Method
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