In this study, experimental research was carried out to evaluate the structural performance of the reinforced concrete beam retrofitted by strengthening methods(embedded CFRP rod of hexagon, CFRP Sheet) in existing reinforced concrete buildings. Test results showed that the maximum load carrying capacity of retrofitted specimens(NER2, NER2-C) were increased by 1.46 ~ 1.67 times respectively in comparison with the standard specimen(NBS).

In recent, high performance concrete structures can be developed using Ultra-High Performance Concrete (UHPC) which has mainly high compressive and tensile strength. Therefore, in reinforced concrete (RC) structures, it is possible to reduce structural elements and the cost of construction by reducing the amount of concrete and steel bars. This study compared and evaluated bending performances of RC and UHPC beams respectively and examined the design suitability of UHPC flexural members.

The purpose of this paper is to establish specifications, to provide design database for the construction of the sea pools(30m x60m x 1.2m). When water overflows by high waves, 3D-analysis by SAP2000 software is required for designing of sea pools in order to settle the problems that the degradation of the concrete durability. This result of analysis show that the strngth of concrete over 60MPa and the distance of 4m plie is more advantageous, then that of 2m.

As the weight is increased by the quantity and size of the members in large scale structures, precast column-beam joints should be designed in consideration of the assembly process. This paper was presented a way to reflect the construction difficulty such as interference of rebar at the end of beam when you design rebar joints and calculation of the length of the embedded steel.

This study conducted the minimum weight optimum design using the differential evolution and genetic algorithm of simple structure. And then, the optimization program was verified with the numerical analysis examples of fixed beams. As a result, the graphs of these two optimization programs increased similarly.

In this study, analyzed of the correlation UPVand the compressive strength of structural timber. As a result, increased of UPV in accordance with the compressive strength increases. Though more experiments, judgment to be possible to estimate the compressive strength of the structural timber with UPV

Using the Irregular Waves based on Spectrum, the structural analysis of the hybrid substructure for offshore wind turbines is carried out through ANSY ASAS in time domain. The comparison of numerical results between P-M spectrum and JONSWAP spectrum is made to investigate the ultimate structural safety. It is found that the suggested hybrid substructure can be an effective substructure for offshore wind turbines.

Using the wave forces obtained from ANSYS AQWA, the structural analysis of the gravity substructure for 5MW offshore wind turbines is carried out through ANSY Mechanical. Moreover, the comparison of natural frequency between the wind turbine and the gravity substructure is made to investigate the resonance. It is found that the suggested gravity substructure can be an effective substructure for 5MW offshore wind turbines.

In this paper, ultrasonic velocity(UV) test through OPC and Slag concrete is conducted considering porosity under compressive and tensile loading conditions. The test results show that up to 50% of compressive loading condition, UV a little increases and remarkably drops at peak load, however it fluctuates under the tensile loading condition because of the number of increase micro cracks in concrete specimens.

This study investigates the geodesic dome based on an icosahedron and development of joint modules that make up a dome structure in order to model the modular dome using the wood-plastic composite member with 70% of wooden fiber contests. The purpose of this work is used as a basis for verification of structural performance of WPC in the real structures.

Recently, research have been rapidly increased for performance of offshore wind turbine. In this study, static structural analysis was carried out for a structural performance of hybrid concrete sub-structure of offshore wind turbine under environmental loads.

The goal of this study is to investigate structural behaviors of steel diagrid depending on geometric parameters such as size, thickness, steel type, and location of components. Numerical applications verify structural behaviors of steel diagrid is very sensitive in terms of the geometric parameters and then diagrid is an appropriately governing system for free-formed structures.

In this study, subject to the new shape vibration damping system that can be reused, it performed response analysis. It have developed the analysis model which can be effectively reflect the structural properties of the damping system is verified through the analysis and experimental results of existing. And it analyzed the response characteristics of the developed damping system through the analysis result.

Recording technology, as an alternative technique of reality that can be expected at the same time ensuring the organisms inhabiting space in the existing city was overcrowded, mitigation of heat island phenomenon of the city, saving heating and cooling energy of a building, the Amenity improvement and urban storm water runoff reduction has been noted. In this study, it has been enforced for the purpose to evaluate the performance of the developed product out roofing hybrid recording system made of metal. Experiments for performance evaluation and structure analysis through the computerized analysis has been carried out.

This study investigated the effect of cement type and ground granulated blast furnace slag (GGBS) on the mechanical properties and workability of grout for offshore PSC structures. As the replacement ratio of GGBS increased, the flowability of the grout increased and both intial and final setting times of grout was delayed regardless of cement type. However, the effects of GGBS on the bleeding of grout were different according to the type of cement: as the ratio of GGBS increased, less bleeding was observed for the grout with typeⅠ cement whereas higher bleeding was generated for the grout with type Ⅲ cement. However, there was no significant difference in their compressive strength at 28 day according the different replacement ratio of GGBS from 0 to 40%.

In this study, a new foundation in a spiral type was developed for the solar electric power system. Based on the structural analysis considering the existing design code, the superiority of the new foundation system was verified via a finite element analysis on the structural stability and safety.

In this study, Criteria for common duct reviewed through comparing of other design standards and criteria specifications whether it is for duplication or contradiction. As a result, It was performed to analysis either to move other codes or to be applied as common duct code according to the classified code system.

In this paper, the improvement methods of working platforms arrangement for NPP(Nuclear Power Plant) construction has been reviewed to enhance the construction accessibility. The working platforms will be enlarged and added because of accessibility of the hi-capacity crane for installation of the SC module and the combined module. The vertical elevator and the working tower have been also proposed to increase construction accessibility. It is concluded that the improvement of constructability is possible based on the consultation of construction company.

Recently, a safety of the building has been issued. In this study, a statistical analysis of the licensing status of the building construction has been performed to check the trend of building construction. Finally, results of the statistical analysis would be helpful to improve of the building safety.

For the corner joint strengthening of the underground box structures, the strengthening method using pressure members was developed. By the applied pressure on the reinforcing members and the increase of nominal strength due to reinforcing member, the size of the reinforcing members are reduced and the performance of corner joint strengthening is improved.