| Title |
Estimation Model of Shear Transfer Strength for Uncracked Pull-Off Test Specimens based on Compression Field Theory |
| Authors |
김민중(Kim, Min-Joong) ; 이기열(Lee, Gi-Yeol) |
| DOI |
https://doi.org/10.12652/Ksce.2021.41.2.0101 |
| Keywords |
전단마찰;전단전달;비균열 인장재하시험;압축장 이론 Shear-friction;Shear-transfer;Uncracked pull-off test;Compression field theory |
| Abstract |
Two different types of shear-friction tests were classified by external loadings and referred to as a push-off and a pull-off test. In a pull-off test, a tension force is applied in the transverse direction of the test specimen to produce a shear stress at the shear plane. This paper presents a method to evaluate shear transfer strengths of uncracked pull-off specimens. The method is based on the compression field theory and different constitutive laws are applied in some ways to gain accurate shear strengths considering softening effects of concrete struts based on Modified Compression Field Theory (MCFT) and Softened Truss Model (STM). The validity of the proposed method is examined by applying to some selected test specimens in literatures and results are compared with the predicted values. A general agreement is observed between predicted and measured values at ultimate loading stages in initially uncracked pull-off test specimens. A shear strength evaluation formula considering the effective compressive strength of a concrete strut was proposed, and the applicability of the proposed formula was verified by comparing with the experimental results in the literature. |