다단 정착부를 갖는 프리스트레스 도입방법을 이용한 장지간 가설교량의 시공사례 연구

Generally, present construction techniques for temporary bridges used in Korea involve high construction costs, long-term construction time and complicated construction methods. Thus, in resent bridge design, studies on application of external prestressing method for calculating the effective section have actively been conducted. Prestressing method of steel girders is an appealing technique to increase their load capacity and span length. This method will result in reduction in the overall steel weight of the structure, thus cost saving is apparent. For that reason, our country developed External Prestressingmethod withMultiple Anchorage(EPMA) in construction of long-span temporary bridges. In this study, verifies the EPMAmethod in long-span temporary bridges focused in construction cases, and introduce the efficiency of prestress method and multiple anchorage compare to the general methods.