建筑结构学报2026，Vol.47Issue(8)：212-223,12.DOI:10.14006/j.jzjgxb.2025.0601
古建筑木结构梁架抗震性能试验研究及数值模拟分析
Experimental and numerical analysis on seismic performance of roof-beam frame in ancient timber building
摘要
Abstract
The roof-beam frame structure constitutes the core load-bearing system supporting the"big roof"in ancient timber buildings,and their damage may lead to deterioration of the overall structural performance.To evaluate the seismic performance of roof-beam frame,a 1∶2 scaled model of the roof-beam frame was designed and tested under low-cycle cyclic loading.The failure patterns,hysteretic behavior,stiffness degradation characteristics,and evolution of top lateral displacement or tenon pull-out of the Jin-gua column were investigated.In addition,strain variations in key stress-bearing regions near the base of the Jin-gua columns were analyzed.The experimental results indicate that the roof-beam frame mainly fails through pull-out and cracking at the upper Jin-gua column,plastic compressive deformation at the hidden dowels and the connections between the Jiao-bei and the Jin-gua column,and pronounced embedment failure in mortise-tenon joints.The hysteresis curves exhibit pronounced pinching effects and residual deformation.Although no obvious reduction in lateral capacity was observed,the model demonstrated good ductility and deformation capacity with evident stiffness degradation.Both the top lateral deformation and tenon pull-out of the Jin-gua column increase consistently with increasing loading displacement.A 3D refined finite element model was developed in ABAQUS,and the simulation results were in good agreement with the test responses.Peak stresses are mainly concentrated at the connections of the Jiao-bei and the Jin-gua column,and at the mid-span of the hidden dowels,where the transverse compressive stresses exceed the transverse compressive strength of the material.Based on the validated model,parametric studies were further conducted to study the influences of vertical load,friction coefficient,loosening of Jiajiao-tenon or Mantou-tenon,and the presence or absence of Jiao-bei constraint to the Jin-gua column.The results show that both initial lateral stiffness and load-bearing capacity increase with the increase of the vertical load or wood friction coefficient.In contrast,increasing looseness of the Jiajiao-tenon or Mantou-tenon leads to reductions in both bearing capacity and energy dissipation.Moreover,the roof-beam frame without Jiao-bei on the Jin-gua column exhibited reductions of 31.87％in the initial stiffness and 65.86％in the bearing capacity.关键词
古建筑木结构/梁架结构/拟静力试验/数值模拟/抗震性能Key words
ancient timber structure/roof-beam structure/quasi-static test/numerical simulation/seismic performance分类
建筑与水利引用本文复制引用
薛建阳,凌怀泉,卢嘉语,陈向松..古建筑木结构梁架抗震性能试验研究及数值模拟分析[J].建筑结构学报,2026,47(8):212-223,12.基金项目
国家自然科学基金项目(52278317). （52278317）
