We are observing the cracking condition of HPC pavement. We used ultrasonic equipment and 3D GPR equipment to inspect cracks. The depth and the deterioration of cracks were good during observation. We are going to observe the crack with caution.

We know that the failure of high performance concrete pavement occurs in the aspects of its structure, environment, material, and construction. We have been able to identify the reason why no construction should be permitted when average daily temperature is below 4 degree celsius. We must pay careful attention to the curing management and comply with the standards of concrete production and construction.

A fatigue crack occurred in the vicinity of the center-stay area is generated. Therefore, the stress and caused of occurrence of each member are analyzed by measurement. When similar cases occur in the future, they shall be utilized as basic data such as research methods and establishment of mesures for maintenance.

When estimate Short Lenth External Tendon's tension by Vibration Measurement Method, We Consider Tendon's Boundary. This paper is a case about estimation of short lenth tendon's tension by using practical formula estimation and stiff string with clamped-clamped boundary conditions.

Space took place between two superstructures of which two bridges are adjacent each other. The cause of space between superstructures turn out to be due to several reason such as stratum composition by various ground condition, ground stability after completion of structure, ground stress bulb double, etc.

전국적으로 의복을 제외한 섬유제품 제조업체 현황은 2012년 기준으로 7,155개에 이르며, 여기에서 발생되는 폐섬유 발생은 총 69,000톤/年으로 많은 폐기물이 발생하는 것으로 나타났다. 최근 재활용에 대한 인식이 높아지면서 폐섬유의 재활용 비율이 60% 정도로 나타나고 있으나, 생활용 섬유 자재에 경우는 재활용 비율이 극히 미약한 것으로 나타나고 있으며, 공정상에 발생하는 부산물 및 폐기물은 대부분 전량 폐기하거나 소각하는 것으로 조사되었다. 본 기술개발의 배경은 생활용 및 산업용 섬유 자재를 제조하는 공정에서 발생하는 공정 부산물 및 복합 섬유 폐기물을 재활용(Recycle)하는 기술로써, 구체적으로는 그물형태의 폴리에스테르 수세미, 마이크로 패브릭, 복합 스펀지형 수세미 등의 공정에서 발생하는 Loss 및 폐기물을 채취하여 보다 간소한 공정과 저렴한 비용으로 재활용(Recycle)하여 가정용 및 산업용에 다양하게 적용할 수 있는 Wiping 제품을 개발하여 상품화를 전개하는 기술이다. 폐기물 시트의 입자간 결합을 위한 Binding 및 Cross Linking 기술을 적용하여 재활용 와이핑 제품의 내구성 및 용도에 적합한 강도를 유지하기 위한 결속을 하고, 와이핑 용도 및 형태 안정화를 위한 후 가공을 통한 와이핑의 형태 안정화와 완성 폼을 형성하기 위한 Pressing이다. 상기의 기술개발을 통하여 생활용 섬유제품 제조현장에서 발생하는 폐기물을 저감시키고, 이 폐기물을 재활용(Recycle)을 위하여 고효율 및 생산성이 확보된 설비 제작 및 기술개발을 통해 새로운 부가가치 제품개발 및 원가경쟁력을 확보하고자 한다.

Vibration measurement analysis and In-depth inspection were carried out to understand the cause of defects occurred on joint of bridge. A cause of defects, such as metallic sounds, water leak&corrosion and rubber seal rupture turn out to be due to deterioration and vibrating impact by period so that the bridge is in need of repair and effective maintenance.

In general, the lateral resistant of bearing in a straight bridge is designed for lateral load such as wind or seismic forces. In this study, however, it is found that the cause of damage of bearings in a straight bridge adjacent to the curved road is the centrifugal force or the breaking force of the vehicle. Also, it is suggested that the repair method for the damaged bearings.

In general, the lateral resistant of bearing in a straight bridge is designed for lateral load such as wind or seismic forces. In this study, however, it is found that the cause of damage of bearings in a straight bridge adjacent to the curved road is the centrifugal force or the breaking force of the vehicle. Also, it is suggested that the repair method for the damaged bearings.

The objective of this study introduce improperly welded Vertical stiffner. Function of vertical stiffner is prevent buckling of web pannel. If Vertical stiffner have some defect, it Should be reviewed structural perspective. And Avoid immediate repair through structural review.

Nonlinear seismic evaluation of RC building usually needs much time and man power, In this study, several computational modules were applied for evaluation of existing RC buildings. To investigate the effect of applied modules on time, seismic performance evaluation of example building was performed and the man power input was compared with conventional process.

Failures of curved bridge have been occurred due to the negative reactions in construction and in survice and this problem has been issued in our society. In this study, the strengthening method of curved bridge which was occured negative reactions was investigated through the structural stability analysis.

The purpose of this study is to measure the abnormal behavior of the bridge with LRB and to analyze the cause. Based on the result of analysis, the abnormal behavior was mainly due to the absence of pre-set process during replacement and the integrated behavior due to constriction of adjacent RAMP.