The quality of injection sealer for water leakage maintenance be being managed by KS. However, the test result of response to the substrate movement performance have some errors by an experimenter. Therefore, this revision standard of test method is proposed by that the new tester is manufactured for solving this errors in this study.

we set reference temperatures for the 4 seasons of Korea and measured the humidity difference of underground structures according to the seasonal change by conducting a test with specimens that applied the same waterproofing materials and methods with basement structures. The test results show that the humidity difference of the specimens that applied unwaterproofed method and inside waterproofing method became higher according to the time variation regardless of temperature, while that of the specimens that applied outside waterproofing method was none or not significant.

With the recent increased awareness of underground water as a resource and detection of radioactive material called radon in underground, underground waterproofing system is newly regard as not only ensuring stability and durability of the structure but also preserving underground water, safety of employee working underground structure, protecting of facilities and comfortable use. For these reasons, constructing industry have highly demanded feasible underground waterproofing system that responding long-life and high-performance new material and developing waterproof performance evaluation techniques. Therefore, this study attempts to build environmental responding waterproof system with high adhesive sealant material and setting a manual of field application in waterproofing construction technique.

Recently, the increased maintenance cost of underground structures due to leakage problems. Also, social issues are discussed in the sink hole caused by the loss of groundwater. For this reason, Leak diagnosis, waterproof and repair of underground structure is important today. So, the aim of this study was the necessity for water leak diagnosis and repair of underground structures.

Ground anchor method is one of the most popular reinforcing technology for slope in Korea. For the health monitoring of slope which is reinforced by permanent anchor for a long period, monitoring of the tension force of ground anchor is very important. Optical FBG sensors embedded tendon was developed to measure the strain of 7-wire strand by embedding FBG sensor into the center king cable of 7-wire strand. This FBG sensors embedded tendon has been successfully applied to measure the reinforcing force of ground anchor during four seasons through temperature compensation of the FBG sensors embedded tendon.

For monitoring of the coastal and offshore structures, many techniques can be applied. In this paper, three different applications were introduced including surface wave based nondestructive testing for concrete structures, vision-based dynamic motion measurement for floating structures, and long-term monitoring using dynamic responses and static strain measurement data for fixed offshore jacket structures.

This study aimed to simulate the complex behavior of structures and predict test results. For this, the leading nonlinear model ‘Bouc-wen model’ was used, and rubber bearing and MR-damper were investigated. While seismic load was being applied, complex behavior of continuous structures was simulated. To test simulation performances, in addition, a seismic response test of the model structure was conducted using shaking table. Then, each structure’s displacement data were compared to simulation results. This study found that nonlinear model-based simulation results were mostly matched with test results, and they are applicable to the prediction of test results.

The objectives of this research are to compute performance point using capacity spectrum analysis, and to use structural damage states classification and damage state criteria through interstory drift angle presented in HAZUS. Seismic fragility curve is drawn by seismic fragility parameter and predict damage probability about non seismic reinforced concrete buildings according to building shapes.

Estimation of damage probability of buildings under a future earthquake is an essential issue to reduce the seismic damage. In this study, capacity spectrum method is applied to develop seismic fragility curve of low-rise non seismic reinforced concrete building under peak ground acceleration.

The dynamic loads such as wind and wave loads are consistently applied to the offshore structure. These dynamic loads affect to the safety and the durability of offshore structure. Tuned Liquid Damper (TLD) was applied to control the vibration of an offshore structure due to dynamic loads. The target structure is jacket structure with PC House for 5-MW offshore wind turbine.

Through The Japanese case that they prevent earthquake damage by using seismic design, we design a building that before reform seismic design and conduct a seismic design evaluation. For detail evaluation, we use Nonlinear Static Analysis and find performance point that using by Capacity Spectrum Method of procedure B and Displacement Coefficient Method. We compared performance point of Capacity Spectrum Method of procedure B and target displacement of using Displacement Coefficient Method. Consequently we obtain a result that those are similar. Result of understanding each element performance level that base on performance point, some elements are unsatisfactory. Thus, We have come to conclusion that re-evaluate after reinforce structure.

The ex-vessel steam explosion may occur when, during a severe reactor accident, the molten core pours into the water in the reactor cavity. These dynamic loads on the cavity wall could potentially lead to the significant failure of the cavity wall. But the phenomenon like this steam explosion includes big uncertainty in estimating the impulsive pressure loading of RCB. In this study, risk based integrity assessment method of the NPP structure subjected to steam explosion load was suggested to capture these uncertainties involved during the structural integrity assessment of the Nuclear power plant.

This study attempted to assess performances of adopted MR-damper to control the complex behavior caused by the interaction of independent continuous structures. For this, MR-damper (30kN) was designed and fabricated, and the MR-damper model was investigated using the Nonlinear Bingham Plastic Damper (NBPD). To assess experimental performances, a control test on the model structure was performed while El-centro 150% of seismic load was being applied. Then, MR-damper was placed between two independent structures to have it control independent displacement and complex behavior between the two structures. This study found that MR-damper is effective in controlling complex behavior of structures.

In consideration of the point skyscraper dense regions of the country that landfill or soft ground layer, it can be seen that the disaster prevention measures of high-rise structures due to an earthquake of long-period component is an urgent need. Thus, in this study, through the analysis of seismic waves of long period components generated abroad, and to investigate the characteristics of the earthquake, and analyzed the damage case of high-rise structures associated therewith.

This paper introduce a calculation method for the length of steel and rebar due to load onto the member in large scale structure using precast composite structure system. As result, cost effectiveness of members in large scale structure is procurable by utilizing steel and rebar economically.

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.

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.

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.