Infrastructure：Bridge and Structure

Research Interests

We conduct research on performance improvement of infrastructures and rationalization of design/fabrication/construction/maintenance, focusing mainly on bridge structures. In order to achieve structural safety, serviceability, durability and cost performance of infrastructures, our goal is to aim for construction of high-performance infrastructures, establishment of rational maintenance/management system of existing structures and promotion of urban renovation. The recent research topics are as follows.

Structural design method of steel structures
Rationalization of steel/composite/hybrid bridges
Evaluation method of durability and remaining strength of existing bridges
Bridge maintenance system
Bridges and structures using fiber reinforced plastics (FRP)
Repair and strengthening methods of existing steel structures
Evaluation and maintenance of historic bridges

Titles of master theses and doctoral dissertations

2018	1.Aging characteristics and durability evaluation for adhesively bonded joints of orthotropic steel deck with SFRC overlay* 2.Study on generation mechanism of low-frequency noise in steel plate girder bridge and countermeasure focused on second vertical vibration mode 3.Study on repair and strengthening of steel girder end with section loss using CFRP members bonded by VaRTM technique 4.Study on joint method and shear strength in trussed girder inspection path using GFRP pultruded profiles
2017	1.Analytical study on remaining ultimate strength of compressive box-section members with sectional loss 2.Load carrying capacity evaluation for corroded girder end in a riveted railroad bridge 3.Enhancement of fatigue durability in out-of-plane welded joints by externally bonded carbon fiber sheets by VaRTM technique 4.Study on generation mechanism of low-frequency noise in steel plate girder bridge induced by traffic vibration
2016	1.Corrosion condition and remaining load carrying capacity for girder end in a riveted railroad bridge used for about 90 years 2.Ultimate strength of super long multi-span suspension bridges with various number of spans and sag ratios 3.Study on repair and strengthening of steel girder end with section loss using CFRP members 4.Evaluation of fatigue durability of adhesively bonded joints and repair effect of fatigue cracks using pre-tensioned CFRP strips

*: Doctoral dissertation

Titles of bachelor theses

2018	1.Fatigue crack initiation-propagation behaviors and strength of welded joints between vertical stiffeners and deck plate of orthotropic steel deck 2.Shear fatigue strengths for adhesively bonded joints of orthotropic steel deck with SFRC overlay 3.Development of repair method for floating production equipment by externally bonded CFRP using VaRTM technique 4.Development of GFRP inspection path with integrated molding sandwich panel slab
2017	1.Fatigue evaluation of existing steel girder bridges designed based on the past bridge design codes 2.Compressive load carrying capacity for girder end with severe local corrosion in an old riveted highway bridge 3.Study on Current status of historical steel bridges and historical and cultural values of steel bridges constructed after World War II 4.Evaluation method of defect in bonded joints using phased array ultrasonic testting system
2016	1.Tensile strengths for adhesively bonded joints of orthotropic steel deck with SFRC overlay exposed in outdoor environment 2.Analytical study on elasto-plastic behavior of an existing steel truss bridge focusing on the gusset plate connections 3.Study on joint method between hybrid composite members and steel members 4.Current status of maintenance of road bridges by questionnaire survey and inspection data