（1 扬州大学建筑科学与工程学院， 扬州 225127； 2 徐州工程学院土木工程学院， 徐州 221111）

［摘要］为了研究柱脚损伤对古建木构架抗震性能的影响，研制了2种不同损伤工况、缩尺比例为1∶3-52的6个直榫木构架试件，对试件进行水平低周往复加载试验，得到了不同损伤柱脚下木构架的破坏形态与滞回性能，进一步分析讨论了损伤木构架的骨架曲线、刚度退化曲线、耗能曲线。研究结果表明,随着柱脚损伤程度的增大，木构架滞回曲线的饱满程度和峰值逐渐降低，骨架曲线的趋向平缓，等效黏滞阻尼系数也逐渐减小，木构架的抗震性能逐渐下降。

［关键词］木构架； 损伤； 低周往复加载试验； 抗震性能

中图分类号：TU366-2文献标识码：A文章编号：1002-848X(2019)09-0066-05

Seismic behavior study of timber frame with damaged column foot

Li Shengcai1, Luo Hongzhen1, Hu Changyong1,2, Zhou Zhongchen1, Yin Huiguang2

(1 College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China；2 College of Civil Engineering, Xuzhou University of Technology, Xuzhou 221111, China)

Abstract:In order to study  the effect of column foot damage on the seismic performance of ancient timber frame, six tenon timber frame specimens with two different damage conditions and scale of 1:3-52 were developed. Horizontal low cycle reciprocating loading tests were carried out on the specimens. The failure modes and hysteretic properties of timber frame under different damaged column foot were obtained. The skeleton curves, stiffness degradation curves and energy dissipation curve of damaged timber frame were further analyzed and discussed. The analysis results show that with the increase of column foot damage, the fullness and peak value of hysteretic curve of timber frame decrease gradually, the skeleton curve tends to be flat, the equivalent viscous damping coefficient decreases gradually, and the seismic performance of timber frame decreases gradually.

Keywords:timber frame; damage; low cycle reciprocating loading test; seismic performance

*国家自然科学基金面上项目（51478409），国家自然科学基金重点项目（51338001）。

作者简介：李胜才，博士，教授，Email：lisc@yzu.edu.cn。