Improvement of Seismic Capacity of Reinforced Concrete Frame Building by Installing Infilled Walls


  • Soo yeon Seo
  • Guncheol cheol Lee
  • Seung joe Yoon



Retrofit effect, infilled walls, RC and form block, capacity spectrum method, five-story building


This paper aims to analytically examine the retrofit effect of two different construction methods for the infilled walls by RC and form block. Accordingly, it compares the performance point on the demand-capacity curve via the capacity spectrum method, and the degree of plastic deformation of the structure between RC and form block infilled walls.

As for the gravity load on the building that extended from the three-story to the five-story structure, the external force on the beam located at the center of the second floor was 2.4 times higher than the internal strength, and for the lateral force, the external force on the beam on the floor of the second core part increased by up to 2.6 times to the internal strength, showing that the reinforcement on the members would be necessary. The members of the building extended to the five stories were determined to be susceptible to gravity load and lateral load, and the load combination of each member showed that it would be effective to install the infilled wall on the shorter side for gravity load and on the longer side for lateral load.




[1] Korea Meteorological Administration, Domestic earthquake occurrence trends by year (1978-2015), 2015 (in Korean)

[2] Ministry of Land, Infrastructure and Transport, A Study on the Prediction of Seismic Damage and Repair Reinforcement of Reinforced Concrete Buildings in Korea, 2002 (in Korean)

[3] Kim, K., Seo, S., Yoon, S., Yoshimura, K. & Sung, K., Experimental study for higher seismic performance of confined masonry wall system, Korea Concrete Institute, Proceeding of Fall Conference, 2004, 12(1): p.3–8.

[4] Seo, S., Jeon, S., Kim, K., Kuroki, M. & Kikuchi, K., Compression Behavior of Form Block Walls Corresponding to the Strength of Block and Grout Concrete. International Journal of Concrete Structures and Materials, Korea Concrete Institute, 2015, 9(1): p.21-33.

[5] Yun, H., Han, M., Kim, S., Lee, G., Park, W. & Choi, C., Structural performance of lightly reinforced concrete frame strengthened with infilled walls by concrete blocks made in recycled sands. Journal of the Architectural Institute of Korea, 2005, 21(4): p.83–90.

[6] Architectural Institute of Japan, Japanese Architectural Standard Specifications 7 (JASS 7), Masonry works, 2009

[7] MIDAS Information Technology Co, Ltd, MIDAS GEN Manual, 2012.

View Full Article: