| Title |
Experimental Study on Minimum Shear Reinforcement of Shear Walls Using 500MPa Steel Re-bars |
| Authors |
Seo, Min-Seok ; Choi, Kyoung-Kyu ; Park, Hong-Gun |
| DOI |
http://dx.doi.org/10.5659/JAIK_SC.2016.32.8.3 |
| Keywords |
RC Shear walls ; High strength steel reinforcement ; Minimum Shear Reinforcement Ratio ; Shear Strength |
| Abstract |
In the present study, experimental investigations were performed on nine reinforced concrete walls with a shear span to wall height ratio of 2.5 and rectangular cross sections under cyclic lateral loading. The major test parameters were the grade of shear re-bar (400MPa and 500MPa), concrete compressive strength (24MPa and 35MPa), axial load ratio (0% and 20%), failure mode (shear failure before or after flexural yielding), and horizontal shear reinforcement details (double layer and single layer). Based on the test results, the structural performances and characteristics of test specimens were investigated in terms of load-carrying capacity (shear or flexural strength), hysteretic behavior, strain distribution, lateral displacement component, and energy dissipation capacity. The test results of specimens designed to be failed in shear before flexural yielding showed that seismic performances of the walls with 500MPa re-bars (20% reduction in shear reinforcement) were almost identical to that of the walls with 400MPa re-bars. For specimens designed to be failed after flexural yielding, the specimen with single layered shear reinforcement showed almost identical strength and greater drift capacity compared to those of the specimen with double layered shear reinforcement. |