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Computers and Concrete
  Volume 25, Number 5, May 2020 , pages 461-470

Numerical analysis of RC hammer head pier cap beams extended and reinforced with CFRP plates
Cheng Tan, Jia Xu and Riyad S. Aboutaha

    This paper presents a numerical study on structural behavior of hammer head pier cap beams, extended on verges and reinforced with carbon fiber reinforced polymer (CFRP) plates. A 3-D finite element (FE) model along with a simplified analytical model are presented. Concrete damage plasticity (CDP) was adapted in the FE model and an analytical approach predicting the CFRP anchor strength was adapted in both FE and analytical model. Total five quarter-scaled pier cap beams with various CFRP reinforcing schemes were experimentally tested and analyzed with numerical approaches. Comparison between experimental results, FE results, analytical results and current ACI guideline predictions was presented. The FE results showed good agreement with experimental results in terms of failure mode, ultimate capacity, load-displacement response and strain distribution. In addition, the proposed strut-and-tie based analytical model provides the most accurate prediction of ultimate strength of extended cap beams among the three numerical approaches.
Key Words
    pier cap beam; extensions; finite element method; CFRP; strut-and-tie model
Cheng Tan, Jia Xu and Riyad S. Aboutaha: Department of Civil and Environmental Engineering, Syracuse University, 151 Link Hall, Syracuse, NY 13244, USA

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