A5054499923- Concrete Properties and Behavior
- Concrete and Cement Materials Research
- Innovative concrete reinforcement materials
- Fire effects on concrete materials
- Refrigeration and Air Conditioning Technologies
- Structural Behavior of Reinforced Concrete
- Seismic Performance and Analysis
- Vehicle Noise and Vibration Control
- Innovations in Concrete and Construction Materials
- Engineering Applied Research
- Hydraulic and Pneumatic Systems
- Masonry and Concrete Structural Analysis
- Thermography and Photoacoustic Techniques
- High-Velocity Impact and Material Behavior
- Dam Engineering and Safety
- Nuclear materials and radiation effects
- Nuclear Materials and Properties
- Aerodynamics and Fluid Dynamics Research
- Conservation Techniques and Studies
- Material Properties and Failure Mechanisms
Nihon University
2020
Nagoya University
2013-2019
Although many studies have found that drying alters the mechanical properties of concrete, mechanism behind this change remains unclarified. The aim study is to elucidate in concrete after through numerical calculation: a 3D mesoscale rigid-body-spring model (RBSM) with three phases, i.e. mortar, aggregate, and interfacial transition zone while considering changes mortar due drying. Based on RBSM results, it concluded compressive strength heating determined by balance impact drying-induced...
The aim of this study is to experimentally investigate the effect drying on a shear wall, and clarify mechanism changes in structural performance due drying. Two sufficiently hydrated wall specimens are prepared. Then, one loaded without drying, while other tested after sufficient until shrinkage concrete reaches an equi-librium state. results show reduction initial stiffness little change ultimate strength dry specimen, spite increase compressive strength. Reproduction numerical analysis...
To evaluate the radiation-induced degradation of concrete, a rigid-body spring network model is introduced that takes into account three phases in concrete: mortar, aggregate, and interfacial transition zone. The proposed enables evaluation change physical properties concrete affected by aggregate expansion under free restraint condition. Good agreement with previous experimental data found for linear specimen compressive strength, Young’s modulus, splitting tensile strength. Based on...
In nuclear power plants, concretes used for biological shielding walls are exposed to radiation such as neutrons and gamma rays over the long-term operation of plant. Previous studies have reported that neutron irradiation causes aggregate expansion due metamictization quartz feldspar leading reduced density a loss compressive strength Young' s modulus concrete. Therefore, it is crucial understand current state concrete shield (CBS) predict its future soundness. this study, rigid-body spring...
At present, damage due to deterioration of concrete structures is a social problem.In order prevent this problem, an infrared thermography method has been proposed and verified as non-destructive inspection different from conventional methods.Therefore, the thermographic testing considering with environmental condition weather which can happen existing structure were considered in present study.In study, effect moisture content on defect detection was focused.As result, it suggested that...