The review of the existing facilities inspection guideline reveals that the dam and river facilities are evaluated mainly by visual and safety inspection. For the efficient maintenance it is necessary to inspect the steel member of the dam and river facilities using the performance-based evaluation method throughout quantitative measurement. In this study durability evaluation index of steel member and evaluation method for the facilities is presented.

The correlation between the degradation scores and service life of the coating is derived by tests and inspection for the coated steel member according to each service environment of several facilities. This correlation called to as the deterioration model can be used to determine the performance grade for the durability of coated steel member of facilities under each service environment, for example, atmospheric, fluvial and marine environment.

After the application of the formuar for the reinforcement index to the behavior of the UHPFRC box girders, reinforcement index does not determine the characteristic of behavior of UHPFRC box girder exactly. So the index should consider the dimension precisely and reference value corresponding to the 0.005 strain of the prestressing strands.

To ensure the safety of weathering steel structures, it is important to evaluate the time-dependent corrosion behavior. Thus, progress and effect of corrosion damage on weathering steel members should be evaluated, but predicted corrosion depth do not go far enough until now, which is affected by the corrosion environment. In this study, the corrosion resistant of weathering steel was examined to quantifiably investigate and compare the corrosion depth of carbon and weathering steel.

This study establishes the procedure of design for unit of buckling resistance steel damper including of the geometric size for sim plate.

The reinforcement effect of buckling resistance steel damper on member with two-column and beam is evaluated by investigating the relationship of lateral load and displacement

This experimental study showed that the shear friction strength that the joint regions of hybrid steel-reinforced concrete beam systems was increased by the dowel bars.

This study examined the ductile behavior of hybrid steel-reinforced concrete beam systems under reversed cyclic lateral loads. All specimens showed a high ductile performance with the displacement ductility ratio of more than 4.6, regardless of the details of dowel reinforcement at the joint region of the developed hybrid beam system.

The review of the existing facilities inspection guideline reveals that the water supply steel pipeline is evaluated mainly by visual and safety inspection. For the efficient maintenance it is necessary to inspect the pipeline using the performance-based evaluation method throughout quantitative measurement. In this study durability evaluation index and evaluation method for the steel pipeline is presented.

To ensure the safety of weathering steel structures, it is important to evaluate the time-dependent corrosion behavior. Thus, progress and effect of corrosion damage on weathering steel members should be evaluated, but predicted corrosion depth do not go far enough until now, which is affected by the corrosion environment. In this study, the corrosion resistant of weathering steel was examined to quantifiably investigate and compare the corrosion depth of carbon and weathering steel.

This study establishes the procedure of design for unit of buckling resistance steel damper including of the geometric size for sim plate.

The reinforcement effect of buckling resistance steel damper on member with two-column and beam is evaluated by investigating the relationship of lateral load and displacement.

To properly maintain steel structures, it is important to investigate the corrosivity of structural member. In this study, atmospheric exposure tests were carried out for 1 year using monitoring steel plates (MSP). In addition, atmospheric corrosion environment were also monitored by temperature and humidity sensor, corrosion monitoring (ACM) sensors, etc.

Indices are selected for the evaluation of deterioration of coated steel, and an evaluation method is proposed for each index. The evaluation methods proposed in this study are then applied on the existing inspection data measured on site, and the correlation between the resulting evaluation scores and service life of the coating is derived statistically. This correlation called to as the deterioration model can be used to determine the performance grade for the durability of coated steel.

Development of performance evaluation method per unit facilities for the performance-based management·operation of the port facilities defined in the accounting process guideline for SOC facilities and verification of the practicability of the developed method.

Reinforced concrete hume pipes have been widely used as drain pipes. However, many reinforced concrete hume pipes are exposed to the deteriorated environments such as freezing-thawing damage, chemical attack and chloride ion immersion by using sea sand. The purpose of this study is to improve the durability of reinforced concrete hume pipe by using the polymer cement slurry(PCS)-coated rebar and treating the surface by polymer cement mortar(PCM). From the test results, it is apparent that PCS-coated rebar has a excellent resistance to chloride ion penetration and the PCM has good mechanical properties and durability as a lining material for reinforced concrete hume pipe product.

In order to estimate the influence of chloride de-icing materials which mainly cause the corrosion of steel structures, the salt spray test was conducted and the corrosion level of steel was investigated. The concentration of the chloride de-icing materials and the number of the spray were selected as variables, and the influence of chloride de-icing materials was estimated according to weight reduction of steel specimens.

This paper introduces the recent development of GFRP-steel hybridized rebar and deals with an evaluation of its mechanical performance by authors. The objective of this study is to investigate tensile and bonding performance of the GFRP-steel hybridized rebar. The effect of hybridization on tensile properties was evaluated by comparing the results of tensile test with those of non-hybrid GFRP bars. The surface of the bar was designed and experimentally evaluated to obtain the sufficient bond strength in this study. To ensure the long-term durability of GFRP-steel hybridized rebar to corrosion resistance, the individual and combined effects of environmental conditions are currently under investigation.

This study was conducted for the development of degradation model for the coated steel member in the atmospheric environment. Field inspection data was assessed against the existing evaluation factors which were proposed by the related research process. A correlation between evaluated degradation score and service life of coated steel member was plotted on the graph, and degradation of the coated steel member could be evaluated by quantitative analysis method.

Steel is a common structural material that is used for bridges, buildings, railroad tracks, wind towers, offshore platforms, and many other applications. Steel naturally corrodes in different atmospheric environments, which results in costs for corrosion protection, prevention and maintenance. The corrosion on steel elements is identified by optical examination, which does not provide information on the material characteristics. Studies have shown that Raman spectroscopy can identify the corrosion products of steel and differentiate between iron oxides and hydroxides. The purpose of this experiment is to validate the use of Raman spectroscopy in accurately identifying corrosion material on steel without a protective coating.