| Title |
Evaluation of P-M Interaction Curve for Circular Concrete-Filled Tube (CFT) Column |
| Authors |
문지호(Moon, Jiho) ; 박금성(Park, Keum-Sung) ; 이학은(Lee, Hak-Eun) |
| DOI |
https://doi.org/10.12652/Ksce.2014.34.2.0355 |
| Keywords |
콘크리트 충전강관;합성구조;P-M 상관곡선 Concrete-filled tube (CFT);Composite structure;P-M interaction curve |
| Abstract |
This study introduces a resource recycling system in urban apartment complex using four different technologies. The four technologies, called 4G, include a production technology for reclaimed water (Green water), a biogas production technology from organic waste (Green biogas), a reuse technology of rainwater (Green rainwater), and urban agropark (Green pyramid). Green water is the technology for producing the reclaimed water from wastewater, rainwater and underground water, and the average concentrations of BOD, SS, T-N and coliform of reclaimed water were 7.8mg/L, ND (not detected), 4.9mg/L and ND, respectively. Green biogas is the technology for producing biogas and effluent after treating organic wastes (e.g. food waste and night soil) discharged from households, and the average production rates of hydrogen and methane were $0.33m^3/m^3/d$ and $0.24m^3/m^3/d$, respectively. Green pyramid, agricultural farm operated by biogas and reclaimed water, provides a healthy and recreational space for residents, and plant growth rates using treated water and reclaimed water showed height of 1.32cm and weight of 112.8g. Therefore, 4G technologies can improve the recycling rate and treatment efficiencies of waste and wastewater in an apartment complex. |