Shear Capacity of Ultrahigh-Performance Concrete with Monolithic Interface and Wet-Joint Interface
- Authors
- Feng, Zheng; Li, Chuanxi; Pan, Rensheng; Yoo, Doo-Yeol; He, Jun; Ke, Lu
- Issue Date
- Jul-2022
- Publisher
- ASCE-AMER SOC CIVIL ENGINEERS
- Keywords
- Ultrahigh-performance concrete (UHPC); Shear capacity; Steel fiber; Wet joints; Keyed joint; Confining stress
- Citation
- JOURNAL OF MATERIALS IN CIVIL ENGINEERING, v.34, no.7, pp.1 - 17
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS IN CIVIL ENGINEERING
- Volume
- 34
- Number
- 7
- Start Page
- 1
- End Page
- 17
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/170041
- DOI
- 10.1061/(ASCE)MT.1943-5533.0004297
- ISSN
- 0899-1561
- Abstract
- A total of 65 Z-shaped ultrahigh-performance concrete (UHPC) specimens with monolithic interfaces, flat-wet-joint interfaces (roughened with a high-pressure water jet), and keyed-wet-joint interfaces were tested under the classical push-off test setup. The influences of steel fiber properties, keyed-joint shapes, and confining stress on the shear strength of the UHPC specimens are discussed. A high-precision equation for predicting the shear capacity of the UHPC specimens with monolithic interfaces, flat-wet-joint interfaces, and keyed-wet-joint interfaces is proposed and verified by experimental results. The test results indicate that steel fibers had a significantly positive effect on improving the shear strength of the UHPC specimens. For the flat-wet-joint specimens, the shear strength increased approximately linearly as the fiber content increased. Using long and hooked-end fibers improved its shear strength. For the keyed-wet-joint specimens, the shear strength improved almost linearly with confining stress, whereas the keyed-joint shape had little influence. The strength reduction factor (the ratio of the ultimate shear strength of the flat-wet-joint interface to that of the monolithic interface) increased with the fiber volume fraction. A relationship between the strength reduction factor and the fiber characteristic parameter is proposed.
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