建筑结构学报2025，Vol.46Issue(4)：153-164,12.DOI:10.14006/j.jzjgxb.2024.0267
十字木枋支承柱脚节点空间受力性能及损伤研究
Spatial mechanical properties and damage analysis of column foot joints with cross intersected timber beams
摘要
Abstract
The spatial mechanical properties of column foot joints with cross intersected timber beams(CFJCITBs)contribute significantly to the seismic responses of multi-story ancient timber structures.In this paper,a finite element modelling method for CFJCITBs was adopted and validated using existing experiments.Rotational analysis of the CFJCITBs under different loading directions was conducted.The differences in the spatial mechanical properties and damage modes were indicated.A simplified spatial model was further proposed.The research indicates that the spatial mechanical properties and damage modes of the CFJCITBs are related to the vertical compression,the rotation direction and angle of rotation.During the initial rotation stage,the rotational stiffness of the CFJCITBs along different rotation directions is close.With the increase of the rotation angle,the differences in the spatial mechanical property of the CFJCITBs with smaller vertical load are more remarkable.Compared to those of the joints around the longitudinal axes of the timber beams,the joint moment under 45° loading to the longitudinal axes of timber beams is decreased by 27％and the timber beams are prone to embedment damage.With the increase of the vertical load,the difference in spatial mechanical property is reduced and the joints are more easily damaged around the longitudinal axes of the timber beams.The proposed simplified model agrees well with the finite element simulation results,and therefore the model could be utilized in spatial analysis of multi-story traditional timber structures.关键词
多层古建筑木结构/十字木枋/柱脚节点/空间力学性能/损伤Key words
multi-story ancient timber structure/cross intersected timber beam/column foot joint/spatial mechanical property/damage分类
建筑与水利引用本文复制引用
吴亚杰,宁雨欣,谢启芳,张利朋,王明谦..十字木枋支承柱脚节点空间受力性能及损伤研究[J].建筑结构学报,2025,46(4):153-164,12.基金项目
国家自然科学基金项目(52108284,52178303),陕西省重点研发计划(2024SF-YBXM-627). （52108284,52178303）
