1.Japan Building Disaster Prevention Association, Seismic retrofitting design guidelines of the existing reinforced concrete buildings, Tokyo, 2001.

2.Fujii, T., Sadasue, K., Yokoyama, T., Ishimura, M., and Minami, K., “Experimental Study on application of Hybrid Seismic Strengthening Method for Existing RC Structure with Low-Strength Concrete : (Part 1) Test Plan of Indirect Connection Element”, Summaries of technical papers of Annual Meeting Architectural Institute of Japan, 2009, pp. 145-146.

3.Ishimura, M., Sadasue, K., Yokoyama, T., Fujii, T., and Minami, K., “Experimental Study on application of Hybrid Seismic Strengthening Method for Existing RC Structure with Low-Strength Concrete : Part 2 Indirect Connection Element Test”, Summaries of technical papers of Annual Meeting Architectural Institute of Japan, 2009, pp.147-148.

4.Jung, J. S., and Lee, K. S., “A proposal of RCSF External Connection Method for strengthening of existing Medium- and Low-rise R/C Buildings”, AIK Autumn Annual Conference, Vol.34, No.2, pp.503-504.

5.Korea Concrete Institute, Concrete Design Code and Commentary, Kimoondang Publishing Company, Seoul, 2012, p.599.

6.ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary”, ACI, Farmington Hills, Mich, USA, 2014, p.492.

7.Kikuta, S., Miwa, A., Mukai, K., Hatori, T., Arai, T., Yamauchi, S., Nakahara, M., Satou, N., and Nakai, S., Development of Seismic Strengthening Method by Seismic Resisting Reinforcement with Steel Tube as Cotter, Report No.30, Toda Corp., Tokyo, 2008. pp.1-8.

8.Ishioka, T., Kikuta, S., Miwa, A., and Suzuki, S., Development of Seismic Strengthening Method by Seismic Resisting Reinforcement with Steel Tube as Cotter Part 3 Experimental Study of the Shear Wall with RM units, Report No. 34, Toda Corp., Tokyo, 2008. pp.1-8.

9.Submitted Korean Patent, Socket shaped anchor, 10-2014- 0038192, May 31st, 2014.

10.Chun, S. C., Kim, Y. H., Jeon, S. H., Kim, J. Y., and Oh, M. H., “Evaluation on Shear Strengths of Single High-Shear Ring Anchors”, Journal of the Architectural Institute of Korea, Vol.31, No.4, 2015, pp.29-38.

11.Korean Society of Steel Construction, Korean Steel Structure Design Code - Load and Resistance Factored Design, Korean Society of Steel Construction, Seoul, 2014, p.463.

12.Korea Concrete Institute, Concrete Design Code, Kimoondang Publishing Company, Seoul, 2012, pp.153-154, 463-498.

13.Eurocode 4: Design of composite steel and concrete structures. Part 1-1: General rules and rules for buildings, Annex B.2 Tests on shear connectors, 2004, pp.110-112.

14.Japan Building Disaster Prevention Association, Outside Seismic Retrofitting Manual, Japan Building Disaster Prevention Association, Tokyo, 2002, p.139.