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.

In the case of a railway bridge where the ratio of live load to fixed load is relatively large, one of the main factors that dominate the bridge life is the fatigue phenomenon that occurs due to long-term accumulation by live load. Therefore, evaluating and constantly maintaining the fatigue life of cables in cable-supported bridges is an important item in ensuring the safety of bridges over their lifetime.

In the case of a railway bridge where the ratio of live load to fixed load is relatively large, one of the main factors that dominate the bridge life is the fatigue phenomenon that occurs due to long-term accumulation by live load. Therefore, evaluating and constantly maintaining the fatigue life of cables in cable-supported bridges is an important item in ensuring the safety of bridges over their lifetime.

Based on the experiment, characteristic of local stresses and deformation in the anchorhead and wedges with prestressing of PSC slab was investigated in this study. As a result, local stresses exceeded yeild stress in the contacts of anchorhead and wedges and in the lower sides of anchorhead

Autogenous shrinkage isn't currently defined in Korean Highway Bridge Specifications. Accordingly, the structural analysis was carried out to reflect the contents on the autogenous shrinkage of the Eurocode(fib Bulletin 55 : Model code 2010). As a result, we examined the possible initial crack caused by the autogenous shrinkage.

The objective of this study is the compensation countermeasure following settlement of culvert which is installed to the back of abutment as a whole, cause analysis about settlement, considering rational repair reinforcement method, and researching the points to be considered for structure design and construction.