| Title |
Shear Strength of High-Strength Concrete Shear Walls |
| Authors |
Yun Hyun-Do ; Choi Chang-Sik |
| Keywords |
Shear walls ; High-strength concrete ; Shear strength ; Shear design |
| Abstract |
Provisions for ACI 318-02, NZS 3101, and AIJ guideline pertaining to shear design of shear walls evaluated the applicability of high-strength, more than 41MPa, concrete shear walls subjected to lateral loads. Results of 73 tests of reinforced concrete shear walls were reviewed. Evaluation of test results conducted in Korea, England, America, Japan, and Australia for low-aspect ratio walls indicates that the nominal unit shear strength(ψ=1.0) calculated using the provisions of ACI and NZS does not represent the observed shear strength well. Especially, AIJ guideline is found to overestimate the shear strength of other walls except Japanese tests. Based on the limited database considered in this study, A reasonable lower bound to the shear strength of high-strength concrete shear walls is found to be MPa. Similar to that of normal strength concrete walls, the rate of increase of the measured shear strength with is less that 1.0. Therefore, the rate of increase of shear strength attributable to the web reinforcement in shear walls appears to be overestimated by the modified truss analogy. |