철도교 철근콘크리트 교각 중공단면 적용의 경제성

As the long span and tall pier are applied frequently, an efficient pier section is required to reduce the sectional area and construction cost of a pier. Though a hollow section has the advantage of decreasing quantity, self-weight and hydration heat of a reinforced concrete pier, the absence of seismic details for plastic design obstructs the application of a hollow section especially in railway bridges. However, researches are ongoing to provide seismic details to design standards, so the use of a hollow section will be increased. In this study, construction cost of piers has been calculated to evaluate the benefit of a hollow pier. A solid pier of a high speed railway bridge has been selected and the construction cost of its pier shaft has been compared with the construction cost of a hollow pier which can replace the solid one. The change of material quantity and construction cost of hollow piers also has been investigated as the height and the diameter of piers vary.