| Title |
Crack Spacing in RC Tension Members Considering Cover Thickness and Concrete Compressive Strength |
| Authors |
김우(Kim, Woo) ; 이기열(Lee, Ki-Yeol) |
| DOI |
https://doi.org/10.12652/Ksce.2018.38.2.0193 |
| Keywords |
평균균열간격;부착특성;피복두께;최대균열간격;사용한계상태 Average crack spacing;Bond characteristics;Cover thickness;Maximum crack spacing;Serviceability limit states |
| Abstract |
This paper proposed a crack spacing calculation formulation which is an important parameter for calculating the crack width, that is the main factor for verification of serviceability limit states and durability performance evaluation of reinforced concrete members. The basic equation of average crack spacing is derived by considering the bond characteristics which is the governing equation for the analysis of cracking behavior in reinforced concrete members. In order to consider the effect of the cover thickness and concrete compressive strength, the crack spacing measured in 124 direct tensile tests performed by several researchers was analyzed and each coefficient was proposed. And, correlation analysis was performed from 80 specimen data where the maximum and average crack spacing were simultaneously measured, and a correlation coefficient that can easily predict the maximum crack spacing from the average crack spacing was proposed. The results of the proposed average crack spacing equation and maximum crack spacing correlation were compared with those current design code specification. The comparisons of proposed equations and the Korean design codes show that the proposed formulation for the average crack spacing and the maximum crack spacing improves the accuracy and reliability of prediction compared to the corresponding provisions of the Korean Concrete Structural Design Code and Korean Highway Bridge Design Code (Limit States Design). |