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The seismic performance of traditional Chuandou timber frame structures having masonry infill is investigated through one-half scale shake table testing. First, the vulnerability of infilled Chuandou frames to out-of-plane collapse of the masonry infill is demonstrated. In view of this weakness, a novel low-cost seismic strengthened method based on flat steel strips and clasp nails was proposed and demonstrated. Results showed that masonry infilled Chuandou timber frames exhibit the dynamic characteristics of masonry structures when subject to low and moderate seismic excitation, and the dynamic characteristics of timber frames at high seismic excitation. The proposed strengthening method was demonstrated to improve the seismic performance of the infilled timber frame. Despite lateral drifts exceeding the recommended maximum value of 1/30, the timber frames themselves exhibited excellent performance with little evidence of distress to the vulnerable mortise-and-tenon connections.

Shake Table Testing of Masonry Infilled Chuandou Timber Frame Strengthened Using a Simple, Inexpensive Approach