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Crack Width Simulation and Nonlinear Finite Element Analysis of Bursting and Spalling Stresses in Precast FRC Tunnel Segments Under TBM Thrust Jack Forces
Tunnel boring machine (TBM) thrust jack force is one of the governing load cases for the design of precast Fiber-Reinforced Concrete (FRC) tunnel...
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Influence of Principal Stress Direction on the Fracture Characteristics of Granite with an Inverted U-Shaped Cavity
The direction of in situ stress is an important factor influencing the fracture characteristics of the surrounding rock of underground tunnels. In...
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Fusion of Conventional and Modern Approaches for Spall Protection of Indian Concrete Structures
Spalling of cover concrete has been identified as a concern for safety and durability of concrete structures. Spalling may occur due to a variety of...
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Comparative Fire Behavior of Reinforced Concrete Beams Made of Different Concrete Strengths
This paper presents the comparative fire performance of reinforced concrete (RC) beams made of concretes with different strengths by undertaking fire...
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Determination of working resistance of support parameter variation of large mining height support: the case of Caojiatan coal mine
Aiming at the problem that it is difficult to determine the reasonable working resistance of support in fully-mechanized top coal caving face with...
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Fracturing process and initiation mechanism of hard rock tunnels with different shapes: particle flow modeling and analytical study
Rock-related disasters such as roof falls, sidewall spalling, and rock bursts are commonly encountered in hard rock tunnels, resulting in frequent...
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Nondestructive Evaluation of Postfire Full-Scale Reinforced Concrete Frames: Field Tests
Fire obviously causes negative effects on reinforced concrete (RC) structures. Assessment of these postfire structures is ultimately important to...
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Formation mechanism of surface defect during high-speed ball-end milling process of hardened die steel Cr12MoV
Cr12MoV die steel is frequently used for cold stam**, cold extrusion, and other cold work applications. However, surface defects such as micro-pits...
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Seismic Assessment of Shotcrete Support in Jointed Rock Tunnels
Shotcrete as a permanent support system is common for many underground openings. However, the performance of the same under seismic loading...
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Performance of Concrete at Elevated Temperatures: A Review
Concrete, comprising cement, coarse aggregate, fine aggregate, water, and admixtures, are extensively used in construction. However, exposure to high...
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Explosive Spalling in R/C Structures Exposed to Fire: Key Aspects in Experimental Testing
Explosive spalling in R/C members exposed to fire consists in the violent expulsion of the hottest layers of concrete, due to the combination of...
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Fire Performance of Ultra-High Performance Concrete
Ultra-High-Performance Concrete (UHPC) is a relatively new form of concrete, with improved compressive and tensile strengths compared to traditional...
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High-Temperature Behaviour of Concrete: A Review
Infrastructure such as residential buildings, industrial structures and nuclear power plants are at risk of fire damage during their service....
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Calibration of Material Parameters for the Chang-Mander Model for Unconfined Concrete
The current basic OpenSees distribution includes several uniaxial models for concrete. Among them, the model proposed by Chang and Mander in 1994...
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Displacement-based seismic performance of RC bridge pier
To correctly manage the road infrastructure before and after an earthquake, it is necessary to estimate and even predict the seismic performance of...
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Zonal disintegration phenomenon based on triaxial dynamic load test of hollow cylindrical sandstone specimens
In the process of deep roadway excavation, the zonal disintegration phenomenon of surrounding rocks has attracted a lot of attention from rock...
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Image-based automatic multiple-damage detection of concrete dams using region-based convolutional neural networks
Detecting damage to concrete dams, such as cracks, spalling, and precipitates, using traditional methods is challenging. In this study, we propose an...
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Study on Impact Resistance of Corroded Concrete Beams
To study the mechanical properties and failure modes of corroded RC beams under impact, this paper verifies the accuracy of finite element model...
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Fire performance of ultra-high performance concrete: effect of fine aggregate size and fibers
This study conducted a thorough investigation on the combined effects of fine aggregate (FA) size, steel fiber, and polypropylene (PP) fiber on the...
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Long-Distance Advanced Pre-grouting Layer Flexible Reinforcement Mechanism and Its Application in Large Mining Height Coal Face
In terms of the technical problems of rib spalling in large mining height coal face, a long-distance advanced pre-grouting layer flexible...
