| Title |
Study on the Efficiency of Post-Tension Slab Method by Tendon Lay-out |
| Authors |
Kim Kang-Su ; Lee Deuck-Hang ; Kim Sang-Sik ; Kim Chang-Hyuk ; Park Jung-Woo |
| Keywords |
Partial Prestressed ; Post-tension ; Top Anchorage System ; Deflection ; Prestressing Force |
| Abstract |
The post-tension (PT) method is generally regarded as a good alternative to solve out the excessive deflection problem in reinforced concrete (RC) structures. Despite this good advantage, however, the application of PT method has been very limited in domestic market due to the unfavorable circumstances such as cost increase, technical problems, and lack of experiences in domestic construction. For the expansion of application of PT method in domestic market, therefore in this research, the influences of structural members and tendon directions on the effective prestress were analyzed, and the efficiency of deflection control by various tendon layout was evaluated. Also, the best layouts of tendons for a construction project was derived and the economic efficiency of PT method was evaluated considering the cost of marterials and construction. In this study, it is confirmed that PT method is very efficient for reducing both deflection and member size. The results of this study also indicated that the partial PT method with top anchorage can be very useful for deflection control, with reasonably small cost increase, in the part of span where large deflection is anticipated. |