Study on mechanical behaviors of column foot joint in traditional timber structure

Juan Wang, Jun-Xiao He, Qing-Shan Yang and Na Yang

Abstract

Column is usually floating on the stone base directly with or without positioning tenon in traditional Chinese timber structure. Vertical load originated by the heavy upper structure would induce large friction force and compression force between interfaces of column foot and stone base. This study focused on the mechanical behaviors of column foot joint with consideration of the influence of vertical load. Mechanism of column rocking and stress state of column foot has been explored by theoretical analysis. A nonlinear finite element model of column foot joint has been built and verified using the full-scale test. The verified model is then used to investigate the mechanical behaviors of the joint subjected to cyclic loading with different static vertical loads. Column rocking mechanism and stress distributions of column foot were studied in detail, showing good agreement with the theoretical analysis. Mechanical behaviors of column foot joint and the effects of the vertical load on the seismic behavior of column foot were studied. Result showed that compression stress, restoring moment and stiffness increased with the increase of vertical load. An appropriate vertical load originated by the heavy upper structure would produce certain restoring moment and reset the rocking columns, ensuring the stability of the whole frame.

Key Words

traditional Chinese timber structure; column foot joint; vertical load; column rocking; mechanical behavior; finite element model

Address

Juan Wang and Na Yang: 1) School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China 2) Beijing\'s Key Laboratory of Structural Wind Engineering and Urban Wind Environment, Beijing Jiaotong University, Beijing 100044, China Jun-Xiao He: 1) School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China 2) Beijing\'s Key Laboratory of Structural Wind Engineering and Urban Wind Environment, Beijing Jiaotong University, Beijing 100044, China 3) School of Computing, Engineering and Mathematics, Western Sydney University, Parramatta, NSW 2150, Australia Qing-Shan Yang: 1) Beijing\'s Key Laboratory of Structural Wind Engineering and Urban Wind Environment, Beijing Jiaotong University, Beijing 100044, China 2) School of Civil Engineering, Chongqing University, Chongqing 400044, China

← Back to Volume 66, No. 1