| Title |
An Estimation of Roughness Coefficient in a Channel with Roughness Correction Blocks |
| Authors |
최흥식(Choi, Heung Sik) ; 김시훈(Kim, Si Hoon) |
| DOI |
https://doi.org/10.12652/Ksce.2014.34.1.0107 |
| Keywords |
조도계수;체적밀집도;블록Reynolds수;항력계수 Roughness coefficient;Density of volume;Block reynolds number;Drag coefficient |
| Abstract |
This paper is on a practical method for determination of the economical steel ratio in RC flexural members with an equal safety factor. The cost functions of each material and labor are considered to construct the cost function. Then, an equation for determination of the economical flexure steel ratio with the lowest construction cost were proposed. It was found that a relevant steel ratio is recommended to be 0.65~1.0% for designing singly reinforced rectangular beam. |