Results 131 to 140 of about 8,071 (302)

In‐situ asphaltene capture with iron oxide nanoparticles in steam‐assisted gravity drainage (SAGD) for improved recovery and partial upgrading of bitumen

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Key improvements obtained by incorporating nanoparticles into a lab‐scale SAGD process configuration. The bar plots show enhanced oil recovery, reduced viscosity, and increased asphaltene adsorption in nanoparticle‐assisted scenarios compared with conventional SAGD.
Luis Prada   +6 more
wiley   +1 more source

Post-tensioned Jointed Structures to Resist Lateral Loads: A Review

open access: yesInternational Journal of Concrete Structures and Materials
This paper presents a comprehensive review of post-tensioned (PT) precast jointed systems as a resilient structural solution for resisting lateral loads.
Dina M. Ors
doaj   +1 more source

Biaxial behaviour of thin concrete walls with rocking base connections [PDF]

open access: yes, 2007
Link to publisher's homepage at http://www.myiem.org.my/Monolithic fixed-based wall panel experienced moderate/severe damage during ground motion. Thus, an alternative wall such as rocking wall system will provide safer structures with minimal damage ...
Nor Hayati, Abdul Hamid, Dr.   +1 more
core  

Review and prospects of shear test of bolted rock joints

open access: yesDeep Underground Science and Engineering, EarlyView.
The laboratory shear test equipment, test method, and numerical simulation of bolted rock joints were summarized. The shortcomings and limitations of the current research were analyzed, and the research prospects were proposed. Abstract Rock bolting is a critical approach in geotechnical engineering for supporting weak rocks.
Shulin Ren   +4 more
wiley   +1 more source

Experimental study on burning rate and flame geometry in construction tunnel fires under high geothermal conditions

open access: yesDeep Underground Science and Engineering, EarlyView.
Abstract As tunnel construction advances in lengths and depths, the construction of tunnels in high geothermal environments has become increasingly common, raising significant fire risks. In this study, a 1:20 scale model tunnel test platform was constructed to investigate the effects of a high geothermal environment on fire behavior in tunnels during ...
Xiaoxian Fei   +6 more
wiley   +1 more source

Permeability of granite from a shallow buried mountain pipe gallery tunnel under unloading confining pressure

open access: yesDeep Underground Science and Engineering, EarlyView.
Triaxial compression tests under unloading confining pressure conditions were conducted to systematically analyze the permeability behavior of granite retrieved from the different classification surrounding rocks. Abstract The rock mass within mountain tunnels undergoes complex changes in permeability, strength, and deformation during tunneling ...
Xiaoyan Zhang   +4 more
wiley   +1 more source

Failure characteristics analysis of the inclined interlayer during water‐soluble cavity construction of underground salt caverns for large‐scale energy storage

open access: yesDeep Underground Science and Engineering, EarlyView.
In the process of water‐soluble cavern construction of salt cavern energy storage, since the interlayer does not dissolve in water easily, sudden collapse will cause engineering accidents such as bending and damage of the inner tube of the cavern.
Zenghui Zhao   +5 more
wiley   +1 more source

Evaluation of Seismic Damage to Non-structural Components in an Isolated Building During the 2022 Luding Earthquake

open access: yes工程科学与技术
On September 5, 2022, a seismic event with a magnitude of 6.8 occurred in Luding, Sichuan, resulting in varying degrees of damage to non-structural components inside a seismic isolation-designed building located near the epicenter fault.
Weiwei CHEN   +4 more
doaj  

Seismic performance of rocking wall-floor plank connection in precast load-bearing structures subjected to lateral cyclic load / Mohd Asha’ari Masrom [PDF]

open access: yes
The severe damage of the precast concrete wall structures recorded in past earthquakes has led to the innovation of the rocking wall concept, which can demonstrate free or minimum damage aftershock of an earthquake.
Masrom, Mohd Asha’ari
core  

Real‐time lithology identification while drilling based on drill cuttings image analysis with ensemble learning

open access: yesDeep Underground Science and Engineering, EarlyView.
A lithology identification while drilling method was developed, integrating an automated cuttings sampling system, a smart drilling rig, and an ensemble learning model. Underground trials achieved 97.42% accuracy in real‐time identification of cuttings lithology and composition, enhancing hazard management and supporting unmanned drilling technology in
Kun Li   +7 more
wiley   +1 more source

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