|
Title |
Shear Strength Model for HPFRCC Beams with Main Longitudinal Tensile Reinforcements
|
|
Authors |
이성철(Seong-Cheol Lee) ; 신경준(Kyung-Joon Shin) |
|
DOI |
https://doi.org/10.11112/jksmi.2020.24.2.60 |
|
Keywords |
HPFRCC; 전단; 전단 강도; 주압축대 기울기; 사인장 균열각 HPFRCC; shear; shear strength; compressive strut angle; diagonal crack angle |
|
Abstract |
Recently, many studies have been conducted on the structural behavior of HPFRCC, but most of the studies focused on the flexural behavior while studies on the shear behavior are limited. In this study, a model has been developed to reasonably predict the shear strength of a HPFRCC beam without stirrups. To develop the model, a HPFRCC beam was simply idealized with upper & lower chords resisting bending moment and a web shear element resisting shear forces. Then, taking into the account of the tensile behavior of HPFRCC, the main diagonal compressive strut angle and shear stress of the web shear element were evaluated on shear failure. Then, the shear strength of the HPFRCC beam could be evaluated. For the verification of the proposed model, the predictions by the proposed model were compared with the test results of 48 HPFRCC beams exhibiting shear failure. The results showed that the proposed model reasonably predicted the actual shear strength with an average of 1.045 and CoV of 0.125. This study are expected to be useful for related researches and design of members or structures to which HPFRCC is applied.
|