In order to utilize existing wall-type precast reinforced concrete (WPC) residential buildings, which were constructed more than 30 years ago maintaining high structural performance and good quality, the authors created static pushover analysis models, which are composed of elastic line elements and inelastic joint springs. The analyses showed that the ultimate seismic strength coefficient in short side direction (C
Q1) was approximately 0.6 and rocking of the multi-story walls was the collapse mechanism. In this research, full-scale experiment of the joint was conducted, in order to investigate its vertical restoring force characteristics. In addition to the improvement of the joint models, coupling beams were newly included in the analysis models. Consequently, C
Q1 increased to 0.68-0.72 and the mechanism was the rocking associated with shear failure of the beams. Furthermore, the analyses were compared with the result from Japanese simple seismic performance evaluation method. The contribution of the coupling beams may be overestimated in the method.
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