본 논문에서는 경북 구미시 봉곡천에 최근 건설된 다기능어도를 대상으로 SAP2000으로 구조 해석하기 위한 변수를 R/C Slab, R/C+S/C Slab 및 지하이동통로 규격(가로×세로)을 1m×0.2m, 1m×0.4m, 1m×0.6m와 유속 0.8m/s, 1.2m/s, 1.6m/s으로 구분하여 해석한결과와 봉곡천 설계식을 비교하여 안정성을 검토하였다.봉곡천의 설계식 보다 R/C+S/C Slab 타입이 지하이동통로 출구부는 휨모멘트와 최대응력은 각각 28~54%, 26~50%, 측벽은 24~47%,17~31%, 상부슬래브인 경우도 10~27%, 4~20% 적게 나타났다. 따라서 최대응력과 휨모멘트가 R/C+S/C Slab 타입이 구조 안정성이 확보되는 것으로 나타났기 때문에 지하통로는 휨모멘트와 최대 응력이 27%, 25%, 측벽은 24%, 15% 상부슬래브는 14%, 10%의 보완이 요구되는 것으로 판단된다.이러한 결과는 지하이동통로 규격이 봉곡천 규격과 동일한 1m×0.4m일 때가 1m×0.2m, 1m×0.6m 보다 안정성이 가장 유리한 것으로확인되었다. 또한 해석 및 분석 결과를 근거로 다기능어도 시공 시 기본 자료로 활용이 기대된다.

In this study, the 3D-analysis of multi-functional fishway with underground passage and is carried out by SAP2000 soft ware. In case of width 2m, 1m of vertical cross-section structure, the width 400mm× length 400mm and the width 1,000mm× length 400mm of square type were experimental parameters. The multi-functional fishway with underground passage and sediment block system is propased in Jeju Island.

In this study, the multi-functional fishway with underground passage, sediment block system reflect the fish's ecological characteristics and many kinds of fish up and down easily is proposed. The 3D-analysis of Reinforced Concrete(R/C) Slab and R/C + Steel Concrete(S/C) Slab with rectangular underground passage are carried out by SAP 2000 software program for multi-functional fishway's durability. The Slab analysis results show that the R/C Slab type of the maximum stress is decreased by 33.5 than that of R/C + S/C type(Size:1m x 0.4m, Velocity: 1.6m/sec)and the shortage of shear is 2 than that of R/C + S/C type(Size:1m x 0.4m, Velocity: 1.6m/sec). The stability of R/C + S/C concrete slab with underground passage is more advantageous than that of R/C concrete slab.

In this study, the multi-functional fishway with underground passage, sediment block system reflect the fish's ecological characteristics and many kinds of fish up and down easily is proposed. The 3D-analysis of Reinforced Concrete(R/C) Slab and R/C + Steel Concrete(S/C) Slab with rectangular underground passage are carried out by SAP 2000 software program about multi-functional fishway's durability. The Slab analysis results show that the R/C Slab type of the maximum stress is decreased by 27.8 than that of R/C + S/C type(Size:0.8m x 0.1m, Velocity: 1.6m/sec)and the shortage of shear is 31.9 than that of R/C + S/C type(Size:0.8m x 0.2m, Velocity: 1.6m/sec). The stability of R/C + S/C concrete slab with underground passage is more favorable than that of R/C concrete slab.

Based on the study of chloride migration coefficient and hydration heat evolution, it was found that the use of ternary blended cement was effective to achieve desired service life and minimum crack index. On the other hand, a high level of compressive strength is required for marine concrete mix design.

In this study, the 3D-analysis of multi-functional fishway with square form of underground passage and circle type of underground passage are carried out by SAP2000 soft ware. In case of width 2m, 1m of vertical cross-section structure, the width 300mm× length 300mm and the width 1,000mm× length 400mm of square type were experimental parameters. The structural analysis results show stress of square form passage for water pressure alleviation by % compared to that of a square form passage. The stability of square type of concrete is more beneficial than that of circle type of concrete.

In this study, the world's first multi functional fishway is proposed including underground passway, 3D-analysis of slab that load carrying capacity conditions and pectinate and vertical structure by SAP2000 recognized internationally. The structural analysis results are showed comb from than rectangular form of the maximum stress decreased 35.88%, 32.35% reduction in the moment, shear stress decreased 47.36%. Sidewall structural analysis results are showed comb form than the rectangular form of the maximum stress decreased 22.22, 31.88% reduction in the moment, shear stress decreased 43.48%. When we design to alleviate the water pressure of fishway wall, comb shape is more economical design than perpendicular form.