Results 61 to 70 of about 34,422 (242)

Finite Element Modelling of Rocking and Hybrid Precast Walls under Seismic Loading

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT In recent years, self‐centring systems have received considerable research interest in the seismic design of precast concrete structures for their ability to limit damage and satisfy resilience requirements. Rocking and hybrid structural walls, characterised by the formation of a single gap at the wall–foundation interface, mitigate damage by ...
Andrea Belleri, Michele E. Bressanelli, Simone Labò, Jose I. Restrepo   +3 more
wiley   +1 more source

A Theoretical Model with the Effect of Cracks in the Local Spalling of Full Ceramic Ball Bearings

Applied Sciences, 2019
For full ceramic ball bearings, cracks occur frequently in the spalling on the rings, which leads to impacts on the bearing dynamic characteristics. In this paper, the spalling is set on the outer ring, and the dynamic model considering the effect of ...
Huaitao Shi, Zimeng Liu, Xiaotian Bai, Yupeng Li, Yuhou Wu   +4 more
doaj   +1 more source

Temporal characterization of rock dynamic destruction [PDF]

, 2019
Dynamic strength tests published in literature have been analysed by structuraltemporal damage criteria. Parameter τ - incubation time - describing material stability behaviour under high-rate influences have been estimated for Kimachi sandstone, Inada ...
Martemyanov, A. N., Petrov, Yu V.
core  

Characteristics of Deformation and Damage of Multi‐Thin Composite Oil Shale Top Plate Under the Influence of Different Factors

Energy Science &Engineering, EarlyView.
In this study, the key control mechanism of surrounding rock stability is revealed by theoretical analysis and UDEC‐Trigon numerical simulation method, aiming at the problem that oil shale roof is prone to separation and slip deformation under complex stress.
Jiang Xiao, Yujiang Liu, Yihui Wang, Boyuan Zhang, Yulin Wang, Tongxiaoyu Wang   +5 more
wiley   +1 more source

Research on Control of Rib Spalling Disaster in the Three-Soft Coal Seam

Shock and Vibration, 2021
Rib spalling disaster at the coal mining faces severely restricted the safe and efficient output of coal resources. In order to solve this problem, based on the analysis of the current status of rib spalling in the three-soft coal seam 1508 Working Face ...
Feng Cui, Tinghui Zhang, Xiaoqiang Cheng
doaj   +1 more source

3D-Mesomechanical analysis of cracking and spalling of concrete subject to high temperatures [PDF]

, 2013
In this paper, an existing meso-structural model for concrete which had been applied to the study of the mechanical effects of high temperatures in 2D, is extended to 3D, and to more complex coupled thermo-mechanical analysis.
Carol, Ignacio, López Garello, Carlos María, Pérez Carreras, Adrià, Rodríguez, Mariana   +3 more
core  

Study on the Energy Evolution and Stability of Roadway Surrounding Rock Under the “Simultaneous Mining–Driving” Condition

Energy Science &Engineering, EarlyView.
Based on theoretical analysis, the energy‐evolution behavior of the surrounding rock at various depths on the solid‐coal side of the 221303 material roadway during the “advancing‐toward‐mining” process was first clarified. Numerical simulations were then performed to validate and elaborate on the theoretical results.
Wei Zhang, Peilin Gong, Kang Yi, Guang Wen, Libin Bai, Lizhu Liu, Chen Gong, Peng Li   +7 more
wiley   +1 more source

Analysis of the Behavior of Mass Concrete with the Addition of Carbon Nanofibers (CNFs) When Exposed to Fire

Applied Sciences, 2019
Due to the importance of concrete as a structural material and the pathologies that can be achieved by reinforced concrete structures when they are subjected to the action of fire both at the level of resistance and deformation, in this research we study
Rubén Serrano Somolinos, María Isabel Prieto Barrio, María de las Nieves González García, Kenzo Jorge Hosokawa Menéndez   +3 more
doaj   +1 more source

Stress Redistribution Mechanisms and Subsidence Control of Fluidized Gangue Backfilling in Underground Coal Mining: Integrated Experimental and Numerical Investigation

Energy Science &Engineering, EarlyView.
Fluidized gangue backfilling controls mining subsidence through stress redistribution in composite backfill‐pillar systems, reducing surface settlement and stress concentrations. Multi‐scale experimental and numerical analysis provides quantitative design parameters for optimizing ground control in sustainable underground coal mining operations ...
Weilong Zhang, Jie Zhang, Yuanzhen Zhang, Wenjing Liu, Liang Li, Deyi Nan, Guannan Zhao, Chen Yang, Haiqing Bian, Hua Shao, Xiao Zuo, Changtai Zhou   +11 more
wiley   +1 more source

Analysis of the spalling process of rock mass around a deep underground ramp based on numerical modeling and in-situ observation

Geomatics, Natural Hazards & Risk, 2020
A comprehensive analysis method based on numerical simulation, displacement monitoring and digital borehole photography was proposed and employed to analyze the spalling characteristics and damage range. A continuous–discontinuous numerical model was set
Xingdong Zhao, Huaibin Li, Shujing Zhang
doaj   +1 more source