Browse > Article
http://dx.doi.org/10.14190/JRCR.2020.8.2.175

An Evaluation of Lap Splice Length of Epoxy Coated Reinforcements Using Beam-End Test  

Kim, Jee-Sang (Department of Civil Engineering, Seokyeong University)
Kang, Won Hyeak (Railway Engineering Department, Seohyun Engineering)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.8, no.2, 2020 , pp. 175-182 More about this Journal
Abstract
The application of epoxy coated reinforcements is increased as a means to prevent a corrosion of reinforcements embedded in reinforced concrete structures, However, epoxy coating may reduce the bond capacity between concrete and reinforcement, which results a longer development length and lap splice length. This paper aims to the possibility of modification in lap splice length from reduction of basic development length which was confirmed using a direct pull out test. Total 36 beam specimens were tested to compare the lap splice properties of normal and epoxy coated reinforcements with beam-end test for various lap lengths and diameters of reinforcements. According to the results on failure modes, deformations, and crack widths of this experiments, the modification factor of 1.2 should be used, though the direct bond capacity is assured through direct pull out test.
Keywords
Epoxy coated bar; Bond-slip behaviour; Bond stress; Lap splice; Beam-end test;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
1 ACI Committee 318 (2014). Building Code Requirements for Structural Concrete (ACI318-14).
2 ACI Committee 408 (2003). Bond and Development of Straight Reinforcing Bars in Tension(408R-03), 31-32.
3 CEN(2004). EuroCode 2, Design of Concrete Structures-General Rules and Rules for Buildings, 131-151.
4 Choi, O.C. (1990). Bond of epoxy-coated reinforcing bars, Journal of the Architectural Institute of Korea, 10(2), 539-542. [In Korean]
5 Choi, O.C., Kim, C.H., Shin, Y.S., Hong, G.S. (1994). Performance test of epoxy coated reinforcing bars: mechanical properties, Journal of the Korea Concrete Institute, 6(3), 173-179 [in Korean].
6 EIG(2011). http://www.epoxyinterestgroup.org/resourcessearch
7 fib (2010) fib Model Code for Concrete Structures, fib, Switzerland.
8 Jung, K.O. (2003). Study on The Calculation of Lap Splices Length in High-Strength Concrete Flexural Members, Master's Thesis, Chonnam National University [In Korean].
9 Kim J.S., Choi, D.H. (2018). A stress transfer length of pre-tensioned members using ultra high performance concrete, Journal of the Korean Recycled Construction Resources Institute, 6(4), 336-341 [In Korean].   DOI
10 Kim J.S., Lee, S.H. (2017). Bond behaviors of epoxy coated reinforcements using direct pull-out test, Journal of the Korean Recycled Construction Resources Institute, 5(3), 298-304 [In Korean].   DOI
11 Korean Concrete Institute (2017). Design Code for Concrete Structures, KCI [in Korean].
12 Lee, K.Y., Kim, W., Lee, H.M. (2009). Tension lap splice length in high-strength concrete flexural members, Journal of the Korea Concrete Institute, 21(6), 753-761 [In Korean].   DOI
13 Lee, S.H. (2018), Quality Assessment and Bond Characteristics of Epoxy Coated Reinforcements, Master's Thesis, Seokyeong University [In Korean].
14 Treece, R.A., Jirsa, J.O. (1989). Bond strength of epoxy-coated reinforcing bars, ACI Materials Journal, 86(2), 167-174.
15 Ministry of Land, Infrastructure and Transport (MOLIT) (2016). Korean Highway Bridge Design Code(Limit State Design), MOLIT [In Korean].
16 Shin, Y.S., Choi, O.C. (1997). Bond properties of epoxy coated bars in high strength concrete, Journal of the Architectural Institute of Korea, 13(6), 209-213 [In Korean].