Enhancing the lateral performance of Chuan-dou timber frame infilled with vertical wood panels

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Chuan-dou timber frame system represents a prevalent form of traditional wooden architecture, extensively employed in Southwest China. The wood infilling wall stands as a primary manifestation of infill wall construction in Chuan-dou timber frame system, and the existence of infilled walls significantly impacts the lateral behavior of Chuan-dou timber frames. In this paper, the internal force analysis of the timber frame specimen infilled with vertical panels (TFVP) had been undertaken by the credible finite element model, elucidating the detailed enhancement mechanism of wood vertical infilled panels on the lateral performance of the timber frame. 10 models with diverse geometric parameters were formulated to investigate the influence of geometric factors on the vertical panels, including width and thickness. The research findings showed that the presence of Dijiaofang and wood infilled walls could result in a substantial enhancement in the load capacities and initial lateral stiffness of the timber frames. Among them, the enhancement effect of Dijiaofang comes from half-tenon joints (HTJs), while the reinforcement of wood vertical infilled panels arises from the interplay between adjacent panels, as well as the squeezing and friction behavior between the infilled wall and Chuan-dou timber frame. Furthermore, the parametric analysis indicated that the geometry of vertical panels has discernible effects on the lateral performance of TFVP specimens.