Improvement of stiffnnear the inner flank by concrete filling in steel box girder bridge

摘要

In the case of a conventional cross-section, the maximum moment and the absolute maximum moment are greatly different from each other, so that it is designed to correspond to a large moment. Therefore, when the cross section is designed through the extension of the bridge, Or if it is designed as a modified cross-section, it is difficult to design and construct and the cross-section becomes higher.;In this method, to improve this disadvantage, the reinforced concrete material is injected into the lower part of the inside of the section to increase the stiffness, because the absolute maximum moment is much larger than the maximum moment. Therefore, the cross section can be made equal to the minimum cross section designed to correspond to the existing maximum moment. As a result, the height can be reduced by about 20% from the height of the existing step-like isosceles trapezoid.