This study was performed to evaluate the cable tension of cable-stayed bridge by using vibration method and Lift-Off Test. As a result, cable tension by the vibration method and Lift-Off Test is most similar.

In this study, longitudinal strain distribution of rebar in the 1-directional tension test are evaluated with an image processing method (IPM). From these results, it is estimated that the necking region can make the over estimation of elongation of rebar, therefore, the estimation except the necking region can be suggested to evaluate the true elongation of rebar.

본 연구의 목표는 PSC 거더 구조물의 긴장력 변화 조건하에 계측을 통한 잔류 긴장력을 예측하는데 있다. 이를 위해 본 연구에서는 도시형 자기부상열차 직선부 PSC 거더의 긴장력 변화에 따른 처짐, 동적임피던스, 그리고 가속도 계측을 통한 고유진동수를 계측하여 거더의 잔류긴장력 변화에 따른 계측 데이터의 변화를 분석하였다.

A lot of cargo accidents occurred due to insufficient securing in the case of marine transportation. If the residual tension of securing rope can be predicted, it will be very useful in the handling of cargo securing work of operators. It was confirmed in the previous study that the fluctuation tension cf securing rope by oscillation could be predicted. In this paper, in order to the prediction of residual tension of securing rope, the experiments were carried out to measure the residual tension of securing rope under the oscillation and cyclic loadings. The residual tensions of two tests were in good agreement with each other. It can be predicted through the cyclic loading test in the estimated fluctuation tension without oscillation test by ship motion simulator.