This paper presents an nonlinear analysis to investigate the high strength concrete through the comparison with the concrete filled steel tubes and concrete filled GFRP. As a result, the high strength concrete has higher strength than the normal strength concrete filled CFGFRP that is widely used for the compressive strut member of the PSC Box Girder bridge. Therefore, it is confirmed that the high strength concrete is appropriate for the compressive struts of the PSC Box Girder Bridge.

The purpose of this paper is to evaluate bond capacity of steel fiber reinforced concrete. Test variables were compressive strength of concrete and steel bar diameter and a total of six specimens in order to examine the discrepancy in bond resistance due to each variable. The specimens were tested by using universal testing machine in displacement control mode. From the test results, it can be seen that the bond strength increased with increasing diameter of steel bar for the same compressive strength of concrete. Also, the higher strength concrete is, the higher bond strength can be found in the test. Significant slip resistance inducing greater bond strength can be observed in the specimens with large diameter steel bar. All the specimens failed in splitting failure after its maximum load and compressive stress of concrete predominated in bond capacity.

Recently corrugated steel member filled with concrete has been applied to various construction structures. In this study, the compressive strength was evaluated based on the number of bolt joints of corrugated steel. And compressive strength was also evaluated according to the shape and spacing of the steel rebar to improve the performance of the corrugated plates.

To obtain design parameter of soil protection structure having anchor type foundation, model test is executed for flexible and rigid structures. Empirical equation for soil impact force with variation of slope angle and spacing is suggested in this study.

Rainfall infiltration affects stability of a slope. Though there are many method to reflect various rainfall conditions into slope stability, they are only focused on constant value of rainfall conditions. The variation of slope stability under various rainfall condition, patterns, is executed in this study. And effective rainfall for rail-transport operation control is also examined for applicability to Korean railway lines.

Improvement of displacement absorbing performance by utilizing the moving clips in order to prevent falling off of the exterior material according to earthquakes and wind, trying to examine the structural performance of the building exterior panel.

In this study, wind fragility for anchor systems installed at sign structures was developed through Monte Carlo simulation method. The fragility is a conditional limit state probability, presented as a function of the 3-second gust wind speed, based on a relation between statistics of wind loads and anchor system resistances. Advertisement sign attached to concrete wall structure was investigated using probabilistic approach with consideration of anchor type, exposure category, and wind directionality. The results showed that the failure due to tension on anchor bolt was dominant and occurred at a very high wind speed. The fragility methodology described in this paper can be used to develop performance-based design guidelines for advertisement structure in high wind regions as well as to provide information on which to base structural safety or expected loss assessments.

It is necessary to develop application design technology and modular of reinforcing bar. After reviewing the rebar drawing of the NPP Stucture and performing the mock-up test, the rebar modularization method in the various area of the NPP Stucture has been established.

The integrated gang form system for outer insulation performs together the construction works of gang form and insulation. Therefore, this study presents the composition type of integrated gang form system and provides the several design cases for field application.

This study presents the comparison of analytical fragility functions obtained from analyses result of spectrum matched to unmatched ground motions expressed in terms of percentage and ratio. Seven random seed earthquake ground motions were matched to United States Nuclear Regulatory Commission (USNRC) specified design response spectrum to carry out time history analyses of a base-isolated nuclear power plant structure. Fragility functions were estimated using the maximum likelihood method from the obtained responses for the selected ground motions. As anticipated the seismic responses obtained using matched time series were higher than unmatched time series which finally led a higher mean. Standard deviation for both cases were compared and for spectrum matched case smaller result were noticed.

Bayesian Approach for efficient collapse response assessment of structure is used in this study. The approach facilitates integration preliminary information of risk assessment with numerical analysis results to get more efficient fragility assessment. We can get the preliminary information from different sources, including professional experience, information on the building design criteria, experimental results and simplified linear dynamic analysis. The combination of prior collapse risk information with nonlinear analysis simulations aims to improve computational and statistical efficiency. In this study, we considered a 62m cantilever and independent intake tower to assess its seismic fragility. The approach provides significant improve the statistical and computational efficiency of seismic fragility as well as precise confidence band of fragility curve compared to alternative method.

This study focus on Perimeter Concrete Wall Dampers (PCWD). PCWD can achieve required large mass ratio without additional mass. This system also can control multimode vibration. Suitable location for the installation of PCWD and their tuning frequencies are selected based on modal parameters of the uncontrolled structure respectively. In addition to the numerical simulation, an eleven story is modeled using SAP2000. The proposed system is greatly reducing seismic response of main structure.

Tuned Mass Damper (TMD) and viscoelastic damper (VED) is a well-known vibration absorbing equipment in the civil engineering realm. Although the dampers are typically used separately, combined use of dampers worth investigation. For that purpose, a numerical model of multi-story building equipped with TMD and VED was developed using finite element software SAP2000. In this study, modal parameter based distribution of hybrid damper system (HDS) using Tuned Mass Damper (TMD) and viscoelastic damper (VED) together has been adopted to reduce the seismic response of the structure.

This study compares the steel column-base plate connections to improve the flexural capacity of small building. In addition, performance level was evaluated by example building. Analysis results, an additional reinforcement is required to the proposed steel column-base plate connection. And then, We should compared the impact of beam-column joints.

In Korea, Small-size buildings are not performed structural calculation. Also it does not assess the safety about lateral loads such like earthquake. In this study, We proposed the steel column bases that can be applied to small buildings. And We analyzed the Steel Column Bases flexural behavior.

In this study aims at exploring the use of steel frame as an innovative method of improving the seismic performance of link beams. Also, the effect of diagonal reinforcement in link beam is evaluated in comparison to conventional reinforcement.

In this study, existing wall-type apartment in 1990s is evaluated by KBC2009. Based on structural calculation, seismic performance evaluation is performed with dynamic nonlinear analysis. After that, this building is extended up to three stories in vertical direction. In this study, the seismic performance evaluation results of wall-type apartment can be used in performance-based design of the vertical extension remodeling.

The development and verification of seismic performance possible role as moment resisting frames connection is needed because rigidly-connected and assembled lightweight steel frame system is not easy to obtain the seismic performance at the same time.

Structural engineers needs know-how about using nonlinear analysis softwares for seismic performance evaluation of existing building. In this study, it’s compared with several softwares, nonlinear analysis are available.

It is necessary to develop application design technology and modular of reinforcing bar. After reviewing the rebar drawing of the NPP Stucture and performing the mock-up test, the rebar modularization method in the various area of the NPP Stucture has been established.