These days structures with ultra high strength concrete and steel are increasing because of the rising demands for high-rise buildings and long span bridges. The techniques of high strength material has been developed rapidly, as they have a lot of benefits such as the reduction of the amount. In this paper, we performed the basic research of practical application examples of the bridge and the structural characteristics of ultra-high-strength concrete and steel strand.

Among the costs composing the life-cycle cost of nuclear containment, the expected loss due to leakage of radioactive material is usually exorbitant, and it takes large amount in the evaluation of life-cycle cost. This study presents a process to determine optimal target reliability for nuclear containments, mainly focuses on its expected loss. It is estimated considering the surrounding environment of nuclear containment. Target reliability of containments having different lifespan can be determined by revising the expected loss estimated from the 20, 40 and 60 years of operation.

Reinforced concrete beams strengthened with mechanically fastened FRP strips and subjected to sustained loads for six months were exposed to outdoor weather and constant high temperatures (40°C). For comparison, the behavior of RC beam with and without sustained loads was evaluated. Results from flexural tests did not show any significant degradation or change of failure mode as a result of sustained load and of environmental effects such as high temperatures and outdoor weather over a period of six months.

Recently, as increasing interests in Korean-style house, the government has promoted the policy that encourage constructing Korea-style house fabricated timber though the improvement of the related law and administration system. Also, the perception for historic preservation has been increased in respond to heightened interest. In this paper, External bond and Near surface mounted was used as the way to reinforce timber structure’s durability. bond strength for specimens with different bond length was investigated.

Throughout this basic study of the design items for standardization in foundation structures are suggested. Reliablity-based methods of desin skills and data analysis are suggested in this paper for standardization. Limit state design method for retaining wall structures are standardized as the National Design Guide.

In light of the maintenance of underground structures, the evaluation scope of precise inspection for safety and diagnosis have been revised. Crack, leakage, deterioration, and drainage system are evaluated with field inspection in maintenance manner. It also proposed that the additional revision of the precise inspection for safety and diagnosis.

In this paper, the maintenance characteristics for the abutment and pier in highway bridges are investigated. The repair and rehabilitation properties are integrated from the Highway Bridge Maintenance System until 2013. Whole numbers of the abutment and the pier in highway bridges are over 37,000. The repair and/or rehabilitation are carried out for the substructure of about 10,240. More than 35 billion won of budget for repair and rehabilitation were used until now. It can be known that during one year about 37,000 won of budget has been used to maintain and preserve each substructure.

A pipe-rack structure exposed to various environmental conditions is one of the critical structures for the safety of a plant industry. Based on a selected, typical pipe-rack structure, this study evaluated the behavior of the pipe-rack structure accounting for the operating condition of the pipe and at the same time the effect of environmental conditions.

This study was conducted to investigate the Structural Health Monitoring(SHM) system built in large-scale structures. Recently large-scale structures such as bridges and high-rise building have installed SHM system and using the SHM system, large-scale structures are monitoring the status of structures. In many practical cases, SHM systems are used sensor, such as strain gauge, inclinometer, accelerometers, seismic, wind anemometer, GPS, to monitor status of structures. This case study foreground potential future research dealing with SHM system using integrated sensor module.

The goal of this study is to investigate an evaluated aerial work flatform for structure maintenance and repair. This study includes technical components and economic aspect. The investigation is extend and helpful to accomplish successful business according to foreign and domestic business.

The most commonly used material of construction structures is steel. In this study, Epoxy-based coating materials and Ceramic-based coating materials durability were investigated. Exposed water immersion, chloride immersion, temperature changes, freezing and thawing for severe environments to simulate and environmental conditions are showed degraded in epoxy-based coating materials.

Even though a falling-off in durability and a decrease of safety was caused by environmental factors, there are various cases that it is difficult for structure to diagnose and review exactly because of their working condition. In this study, we show an example which is an inspection of a small waterway culvert having three boxes. It will be used helpfully to evaluate a like structure.

Cracks in concrete structures should be measured periodically to assess potential problems in durability and serviceability. Conventional crack measurement problems in durability and serviceability. Conventional crack measurement systems depend on visual inspections and manual measurements of the crack features using microscope and crack gage. However, conventional methods take time as well as manpower, and lack quantitative objectivity resulted by inspector. In this study, crack width detection of concrete structures using image processing and present a hardware specification throughout the experiment.

Reinforced concrete structures are deteriorated in a few decades due to various causes, such as carbonation. Therefore it is important to evaluate the accurate carbonation depth in order to secure the durability of the structure. In this paper, carbonation depth by drilling excavation and splitting core sample are compared. Also, the procedure for estimating the appropriate repair zone is proposed, with the result of carbonation depth and steel bar detection.

This paper aims at featuring dynamic characteristic of cable-stayed bridge by means of an artificial filter bank(AFB), for the purpose of effective acquirement of real-time valid dynamic(acceleration) responses. The AFB was embedded into a wireless sensing system. Also, through modal testings performed on a model of cable-stayed bridge, its dynamic characteristics were featured on natural frequency. They were evaluated in comparison to wired measurement responses and FE analysis. Finally, the dynamic wireless measurement system on the basis of AFB were found technologically and economically effective by obtaining valid dynamic(acceleration) responses whose size was compressed over the frequency range of interest.

The Korean electric power industry autonomously developed the Korea Electric Power Industry Code (“KEPIC”) with political support from the government with a view to creating domestic codes and standards for electric power facilities. Since KEPIC was initially issued in November 1995, the Korea Electric Association (“KEA”) has consistently updated it, developing new codes and standards like Structural Maintenance Inspection and so on.

This Paper Checks Requirements of Nondestructive Examination in KEPIC-S(Structure Field in Korea Electric Power Industry Code). And Remind other Requirements differing with KEPIC-MEN That is a Sub-Suction in KEPIC.

In this paper, decentralized data process based system identification(SI) method for building structure is proposed. For verification of the method, an experimental study was performed and the validity of the method was confirmed using unused displacement response in SI.

Large span roof structures require an analysis of their static and dynamic behavior depending on the physical parameters defining the structures. Therefore, it is highly desirable to estimate the parameters from observations of the system. However, the study of the behavior of such structures shows the existence of critical parameters. A small change in such parameters causes a significant change in the motion behavior. In this paper we study the parameter identification problem for shallow sinusoidal arches considering damping effect.

This study, in order to complement instability of analysis result stemming from the choice between reference point and comparison point which is pointed out as the defect of shift-share analysis, conducted shift-share analysis using Gross Regional Domestic Product (GRDP) trend of Geumgang area, Chungcheongnam-do for the period from 2000 to 2011. As a result of the analysis, ➀ industries that had both the positive Regional Share Effect (RSE) and Industrial Mixed Effect (IME) were service industries such as manufacturing industry, electricity gas, transportation industry, art, etc., which are positively influencing the regional industry. ➁ industries that had both the negative RSE and IME were other service industries such as wholesale and retail businesses, lodging industry, food industry, real estate business and leasing service, business service industry, public administration, etc., which provide basic livelihood services for the residents. ➂ industries that had the positive RSE and negative IME were agriculture, forestry and fishery industry, mining industry, construction industry, and educational service industry. ➃ industries that had the negative RSE and positive IME were info-communications industry, financial and insurance businesses, health industry, etc.