Document Type

Concrete structures paper

Publication details

Hara, T & Enmei, N 2014, 'Experimental analysis of the strength at the panel point of R/C panel structure', in ST Smith (ed.), 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23), vol. I, Byron Bay, NSW, 9-12 December, Southern Cross University, Lismore, NSW, pp. 339-344. ISBN: 9780994152008.

Peer Reviewed



This paper presented the strength at the panel zone of the reinforced concrete (R/C) Thick Wall Frame System (TWFS) experimentally. TWFS structures have been used for R/C residential building because of their wide spaces, flat walls and their noise protection behaviour. Thick walls and floor slabs were connected to form the TWFS structure. TWFS was prone to represent the failure at panel zone under flexural load. The panel zone failure induces the wall failure like the column failure of a frame system. Therefore, to prevent the panel zone failure, several additional reinforcements, such as Kanzashi (hairpin) bars and Shin (lead) bars, have been proposed and arranged. However, the utilities of them have not been investigated precisely. In this analysis, R/C TWFS models were tested under the combination of Kanzashi and Shin bars. The models were tested under monotonic loading and the displacement and the strains were measured. From the experimental results, the failure mechanisms of TWFS were clarified. Kanzashi and Shin bars prevented the formation of the plastic hinge at the panel zone of TWFS intesection and moved the occurence of the plastic hinge to the floor slabs. Shin bars improved the ductility of the panel zone together with Kanzashi bars.