Effects of tou-kung layer layout on seismic performance of ancient timber structure
Pan Yi1,2 Yuan Shuang1 Guo Rui1 Zhang Yu3 Zhang Qi1
1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2. Key Laboratory of Seismic Engineering of
Sichuan Province, Southwest Jiaotong University, Chengdu 610031, China; 3. School of Architecture and Design, Southwest Jiaotong University,
Chengdu 610031, China
Abstract：The specification and layout of Bujian tou-kungs of ancient timber structure have a clear historical evolution. To study the effects of the scale of tou-kungs (from big to small) and the number of Bujian tou-kungs (from less to more) on the seismic performance of ancient timber structure, four simplified ancient timber models with different tou-kung schemes were designed based on the Raoyi Temple and Baoguo Temple. By means of the ABAQUS finite element program, elasto-plastic time-history analysis were conducted. Displacement and acceleration responses at column root, Pupaifang top and tou-kung top were studied under different input seismic excitations. The research results show that the acceleration is gradually reduced with the sequence of column root, Pupaifang top and tou-kung. The acceleration attenuation effect and lateral deformability decreased with the scale. As the number of tou-kungs increases and the regularity of layout of tou-kung enhances, the acceleration attenuation effect of tou-kung layer becomes stronger and the lateral deformability of tou-kung layer and column frame decreases. Under strong earthquake actions, damage of model mainly occurs at the Steamed Buns tenons and the connects of Efang and eaves column, and the main damage forms are separation of tenons from mortises and compression deformation of tenons.
