Results 61 to 70 of about 994,024 (202)

Mechanical and Energy Evolution Characteristics of Sandstone under True Triaxial Cyclic Loading

, 2023
To study the mechanical and energy evolution characteristics of sandstone under true triaxial cyclic loading, a sandstone mechanical test with different intermediate principal stress under true triaxial loading was conducted using the rock true triaxial ...
Minjie Qi, Ruipeng Qin, Chaotao Fan, Xiaoyu Lu, Guangming Zhao, Chunliang Dong   +5 more
core   +1 more source

Numerical research on anti‐dislocation measures design of deep‐buried tunnels in an anisotropic rock mass area

Deep Underground Science and Engineering, EarlyView.
This paper conducts a numerical simulation study on the construction of a deep‐buried tunnel in an anisotropic stratum area. A statistical analysis of the effects of two anti‐faulting design measures, namely, a conventional design and an articulated design, is carried out, and the results demonstrate the effectiveness of the anti‐faulting structures ...
Shiqi Liu, Huanling Wang, Yong Zhou, Zhen Wang   +3 more
wiley   +1 more source

Intelligent inversion analysis of dilatancy angle of surrounding rock based on the force of negative Poisson's ratio anchor cable

Deep Underground Science and Engineering, EarlyView.
An intelligent inversion framework estimates the dilatancy angle of the surrounding rock from negative Poisson's ratio (NPR) anchor cable force histories. Numerical tunnel‐excavation simulations generate force data across a controlled dilatancy‐angle range, which are mapped to the target parameter using a sequential convolutional neural network (CNN ...
Li Cui, Zhihao Sun, Lei Wang, Zhenmin Qi, Jianjun Ma, Xiaoming Sun   +5 more
wiley   +1 more source

Three‐dimensional hardening‐softening elastoplastic modeling of nondilatant rock‐like materials with nonorthogonal flow rule

Deep Underground Science and Engineering, EarlyView.
A novel three‐dimensional elastoplastic constitutive model is developed for nondilatant rock‐like materials under true‐triaxial stress conditions. A piecewise yield function captures the evolution of 3D yield surfaces during hardening‐softening processes, while a fractional‐order‐controlled nonorthogonal flow rule enables flexible regulation of ...
Jiacun Liu, Dongping Liu, Cifeng Cheng, Ying Xu, Kaiwen Xia   +4 more
wiley   +1 more source

Influence of stress anisotropy on horizontal well performance predicted via special core analysis under true triaxial conditions

, 1994
In this work, a new true triaxial cell and servo-control system has been developed which is capable of applying independent and unequal radial stresses to the curved surface of a cylindrical core plug.
B.R. Crawford, Crawford, B. R., Smart, B. G D, B.G.D. Smart   +3 more
core   +1 more source

Determining rock elastic parameters using a new true-triaxial-based technique

, 2021
: Rock elastic parameters (e.g., elastic modulus and Poisson’s ratio) are the most critical design features in geotechnical engineering since intact and rock masses generally respond in an elastic fashion up to the yield point when under complex three ...
Mehdi Serati (20058267), Robert Purser (20181087), Zhongwei Chen (309700), Mytaz El-Amin Mohmoud (20181090)   +3 more
core   +1 more source

Failure characteristics and the energy criterion of rock with a through‐going joint under true‐triaxial unloading conditions: Insights from the DEM model

Deep Underground Science and Engineering
Excavation unloading damages rock masses, with preferential failure along geological defects in rock engineering, which may induce catastrophe geological hazards.
Fei Liu, Changhui Liang, Sijia Liu, Yongjun Zhang, Luo Wang   +4 more
doaj   +1 more source

Development and Validation of a Seismic Design Method for Anchored Retaining Walls

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT Retaining walls with multiple anchor levels are widely used as permanent excavation support systems for the construction of linear infrastructures. Yet, their seismic behaviour remains largely unexplored, and current design approaches rely on conventional procedures that do not adequately reflect the actual dynamic response of these systems ...
Luigi Callisto, Chiara Molinaro, Davide Noè Gorini   +2 more
wiley   +1 more source

Determining coal directional mechanical properties using true triaxial testing facility [PDF]

, 2020
Knowledge of coal mechanical properties and strength is critical in modelling and understanding pillar stability, gateroads stability, gas drainage borehole integrity as well as coal responses to hydraulic fracturing stimulation.
Mohmoud, Mutaz El-Amin, Chen, Zhongwei, Serati, Mehdi   +2 more
core   +2 more sources

Next‐Generation Seismic Performance Assessment Through Multi‐Component Ground Motion Compatible Intensifying Artificial Acceleration

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT Despite the crucial need for fully quantitative risk assessment of large‐scale structures, their performance is typically assessed through deterministic or semi‐quantitative approaches. The main preventing factor is the computational burden of probabilistic seismic analyses.
M. Amin Hariri‐Ardebili, Giacomo Sevieri, Carlo Resta, Golsa Mahdavi, Anna De Falco, Siamak Sattar, Sissy Nikolaou   +6 more
wiley   +1 more source