Effect of Permanent Formwork using Ultra-High Performance Concrete on Structural Behaviour of Reinforced Concrete Beam Subjected to Bending as a Function of Reinforcement ParameterSung-Hoon Kang, Sung-Gul Hong and Yang-Hee Kwon*
Department of Architecture and Architectural Engineering, Seoul National University, 1 Gwanak-Ro, Gwanak-Gu, Seoul 08826, Republic of Korea
- *Corresponding Author:
- Yang-Hee Kwon
Department of Architecture and Architectural Engineering
Seoul National University, Gwanak-Ro
Gwanak-Gu, Seoul 08826, Republic of Korea
Tel: +82 2-880-5114
E-mail: [email protected]
Received Date: February 27, 2017 Accepted Date: March 22, 2017 Published Date:March 26, 2017
Citation: Kang S, Hong S, Kwon Y (2017) Effect of Permanent Formwork using Ultra-High Performance Concrete on Structural Behaviour of Reinforced Concrete Beam Subjected to Bending as a Function of Reinforcement Parameter. J Appl Mech Eng 6: 260. doi: 10.4172/2168-9873.10002609
Copyright: ©2017 Kang S, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
In order to use ultra-high performance concrete (UHPC) as a permanent formworks for a reinforced concrete (RC) slab in a construction field, the structural performance of the RC-UHPC composite beams subjected to bending are experimentally investigated. The main parameters are the rebar location and the UHPC thickness. The experimental results show that the crack patterns of the composite specimen is different compared to the reference RC specimen, because of the crack localization phenomenon of UHPC. Within the post peak state of the load-deflection relationship, the composite specimen behaves similar to the RC specimen. However, the reinforcement of deformed bars in the UHPC section shows a synergy effect on structural performance; both load and deformation capacity is significantly increased. Nevertheless, it is required to reinforce the bars in normal concrete section for preventing debonding failure as well as for retaining the load resisting capacity at the post peak state. The best structural performance of the composite specimen is found when the reinforcement ratios are the same in the both normal concrete and UHPC sections. The results of this study help to apply and design the thin UHPC panel as a permanent formwork for retrofitting existing structures.