| 摘要 |
<p>There is provided a composite girder having a box-shaped steel member filled with concrete, including: an outer steel member having a blocked-out empty space in a lower portion of the composite girder by forming a hollow penetrating portion penetrating in a transverse direction between both ends; and inner-side concrete filling an inner space of the outer steel member excluding the hollow penetrating portion without using reinforcing rods. Accordingly, it is possible to effectively resist tensile stress in a DD of the girder and to efficiently cope with vibration and drooping. Since a space occupied by objects such as facility pipes disposed under the girder can be removed, an inter-floor height of a building can be optimally used, and thus, usability can be improved. In addition, the composite girder can be used as a bridge girder capable of optimizing the bridge height.</p> |
