An Experimental Study on the Behavior of Shear Keys According to the Curing Time of UHPC

Hee Seok Kim, Won Jong Chin, Jeong Rae Cho, Young Jin Kim, Hyejin Yoon

Structural Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology, Goyang-Si, Republic of Korea.

DOI: 10.4236/eng.2015.74017                

Abstract

Precast segmental construction has been recently developed to reduce the construction cost and shorten the construction term as compared to the cast-in-place method in a will to establish the design and erection system of structures using Ultra High Performance Concrete (UHPC). However, this method requires the presence of segmental joints to transfer the loads between neighboring segments, which stresses the importance of securing structural safety and serviceability. Therefore, need is for research on the behavior of the segmental joint for the structures erected by the precast segmental construction method. To that goal, this paper presents an experimental study on the behavior of shear keys with respect to the curing time of UHPC in the segmental joint. Analysis is done on the load-displacement relation according to the curing time of the shear keys and on the failure modes of the shear keys according to the cracking pattern at failure.

Keywords

Ultra High Performance Concrete, Precast Segmental Joint, Curing Time, Shear Key

Conflicts of Interest

The authors declare no conflicts of interest.

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