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http://dx.doi.org/10.4334/JKCI.2015.27.4.399

Shear Strength of Prestressed PC-CIP Composite Beams with Vertical Shear Reinforcement  

Suh, Jung-Il (Dept. of Architecture & Architectural Engineering, Seoul National University)
Park, Hong-Gun (Dept. of Architecture & Architectural Engineering, Seoul National University)
Hong, Geon-Ho (Dept. of Architectural Engineering, Hoseo University)
Kang, Su-Min (Dept. of Architectural Engineering, Chungbuk National University)
Kim, Chul-Goo (Dept. of Architecture & Architectural Engineering, Seoul National University)
Publication Information
Journal of the Korea Concrete Institute / v.27, no.4, 2015 , pp. 399-409 More about this Journal
Abstract
Recently, the use of composite construction method using precast (PC) and cast-in-place (CIP) concrete is increased in modular construction. For PC members, pre-tensioning is used to improve efficiency of the structural performance. However, current design codes do not clearly define shear strength of prestressed PC-CIP composite members. In this study, 22 specimens were tested to evaluate shear strength of prestressed composite members with vertical shear reinforcement. The test variables were the area ratio of high-strength (60 MPa) to low-strength concrete (24 MPa), prestressing force of strands, shear span-to-depth ratio(a/d), and vertical shear reinforcement ratio. The test results showed the prestressing force did not completely restrain diagonal cracking of non-prestressed concrete in the web. Thus, the effect of prestress force was not insignificant in the effect for monolithic beams. The vertical shear strength and horizontal shear strength of the composite beams were compared with the strength predictions of KCI design method.
Keywords
shear strength; prestressed concrete; precast concrete; composite beam; horizontal shear;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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