A5090176087- Concrete Corrosion and Durability
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Structural Behavior of Reinforced Concrete
- Infrastructure Maintenance and Monitoring
- SAS software applications and methods
- Seismic Performance and Analysis
- Structural Health Monitoring Techniques
- Structural Response to Dynamic Loads
- Structural Load-Bearing Analysis
- Corrosion Behavior and Inhibition
- Infrastructure Resilience and Vulnerability Analysis
- Earthquake and Tsunami Effects
- Structural Engineering and Vibration Analysis
- Innovative concrete reinforcement materials
- Probabilistic and Robust Engineering Design
- Geotechnical Engineering and Underground Structures
- Concrete and Cement Materials Research
- earthquake and tectonic studies
- Earthquake and Disaster Impact Studies
- Non-Destructive Testing Techniques
- Nuclear Materials and Properties
- Smart Materials for Construction
- Astronomy and Astrophysical Research
- Nuclear reactor physics and engineering
Waseda University
2016-2025
Oklahoma State University
2019
Politecnico di Milano
2019
Lehigh University
2019
Shenzhen University
2016
University of Miyazaki
2012
Tohoku University
2003-2011
Marymount University
2011
The University of Tokyo
1985-2008
Tokyo Institute of Technology
2000-2008
After recent large earthquakes, field investigations confirmed that several bridges were severely damaged and collapsed not only due to the earthquake, as an independent hazard, but also subsequent tsunami, landslide or fault displacement. In addition, long-term material deterioration might have important impact on seismic damage bridges. Therefore, it is study both interacting hazards their effects reliability risk of bridge networks. Although earthquake still a dominant hazard in many...
We present a thermal lattice Bhatnager-Gross-Krook (BGK) model in D-dimensional space for the numerical simulation of fluid dynamics. This uses higher-order velocity expansion Maxwellian-type equilibrium distribution. In meantime, symmetry has been upgraded to ensure isotropy six-order velocity-moment tensor. These manipulations lead macroscopic equations without nonlinear deviations, from which conventional or nonthermal BGK models suffered. demonstrate improvements by conducting classical...
Abstract Over the last two decades, probabilistic assessment of reinforced concrete (RC) structures under seismic hazard has been developed rapidly. However, little attention devoted to reliability corroded structures. For life‐cycle RC in a marine environment and earthquake‐prone regions, effect corrosion due airborne chlorides on capacity needs be taken into consideration. Also, type corrosive quantified. In this paper, evaluation displacement ductility based buckling model longitudinal...
Establishing consistent criteria for assessing the performance of structural systems and infrastructure networks is a critical component communities' efforts to optimize investment decisions upkeep renewal built environment. Although member-level reliability assessment procedures are currently well-established, it widely recognized that member-oriented approach does not necessarily lead an efficient utilization limited resources when making related management existing deteriorating...
Corrosion-induced crack width can provide effective information on the deterioration level of in situ corroded reinforced concrete (RC) structures. However, uncertainty associated with relationship between corrosion-induced and steel corrosion RC structures is quite large. In this study, a probabilistic framework for estimating structural capacity using observational distribution machine learning proposed. Based experimental results beams, random field theory, finite element (FE) analysis,...
In this paper, the hazard curve associated with airborne chlorides in a marine environment and computational procedure to obtain probability of occurrence corrosion cracking reinforced concrete (RC) structures are presented. A method for integration effects chloride into reliability-based durability design RC is proposed. By using method, it possible determine due chlorides, regardless region, distance from coastline, properties controlled by water cement ratio.
The probabilistic estimation of tsunami impact on bridges and the evaluation potential risk are important topics, but they still in very early stages development. First, this paper presents damage during great Tohoku-oki earthquake giant 11 March 2011 based field investigation. conditions possible failure mechanisms due to particularly discussed. Second, fragility curves presented. Empirical utilization data associated with past disasters have been developed. In paper, established...
The material properties of concrete structures and their structural dimensions are known to be random due the spatial variability associated with workmanship various other factors. This randomness produces spatially variable corrosion damages, such as steel weight loss cracks. capacity reinforced (RC) members strongly depends on local conditions reinforcements. Modelling is important, but in RC can only observed after severely damaging members. To understand growth process change time,...
To develop disaster mitigation measures in coastal regions affected by earthquakes, it is important to consider the effects of both seismic and tsunami hazards on road structures assess social impacts associated with economic loss reduction network functionality. In this paper, a risk- resilience-based assessment framework established for networks under hazards. proposed methodology, risk resilience are quantified postdisaster functionality networks, respectively. Uncertainties estimations...
This article presents a novel system reliability-based framework for multi-objective optimisation of preventive maintenance (PM) management in-service asphalt pavement. To accurately predict the international roughness index (IRI) sequence pavement sections, long short-term memory (LSTM) neural network that considers spatiotemporal correlations between IRI sequences is trained with data retrieved from long-term performance (LTPP) program. Based on time-dependent limit-state functions (LSFs)...
AbstractEven though accurate structural models have been developed for the performance of corroded structures subjected to monotonic flexure and/or shear, studies on seismic that include corrosion damage are scarce. For lifetime assessment in aggressive environments and earthquake-prone regions, effects need be taken into consideration. Whereas demand depends results hazard assessment, deterioration capacity environmental assessment. The analysis life-cycle reliability reinforced concrete...
Although several models are available for evaluating the structural performance of corroded reinforced concrete (RC) structures, seismic reliability assessments considering effect steel corrosion currently scarce. Determining how long existing RC structures in an aggressive environment will be able to have a safety level greater than threshold remains difficult. Life-cycle these under hazards and associated with airborne chloride discussed this paper. When predicting observational data from...
The deterioration of reinforced concrete (RC) structures due to chloride-induced corrosion is not spatially uniform because the spatial variability related material properties and environmental stressors. This variation has a substantial effect on reliability RC structures. However, few experimental studies have focused interaction pits among tensile rebars Therefore, in this paper, an procedure that incorporates X-ray digital image processing techniques was conducted slab specimens...