[1]薛建阳,毛妍,宋德军,等.开裂残损柱头科斗栱抗震性能及退化规律研究[J].西安建筑科技大学学报(自然科学版),2024,56(05):633-641.[doi:10.15986.j.1006-7930.2024.05.001]
　XUE Jianyang,MAO Yan,SONG Dejun,et al.Study on seismic performance and degradation law of cracking damaged Dougong bracket at columns[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2024,56(05):633-641.[doi:10.15986.j.1006-7930.2024.05.001]
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开裂残损柱头科斗栱抗震性能及退化规律研究
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
56
期数:
2024年05期
页码:
633-641
栏目:
出版日期:
2024-10-28

文章信息/Info

Title:
Study on seismic performance and degradation law of cracking damaged Dougong bracket at columns
文章编号:
1006-7930(2024)05-0633-09
作者:
薛建阳1; 2; 毛妍1; 3; 宋德军1; 何圳1; 吴晨伟1; 2; 叶重阳1
（1 西安建筑科技大学 土木工程学院，陕西 西安 710055；2 西安建筑科技大学结构工程与抗震教育部重点实验室，陕西 西安 710055；3 陕西交通职业技术学院 建筑与测绘工程学院，陕西 西安 710018）
Author(s):
XUE Jianyang1; 2;  MAO Yan1; 3;  SONG Dejun1;  HE Zhen1;  WU Chenwei1; 2;  YE Chongyang1
（1. School of Civil Engineering, Xi′an Univ. of Arch. & Tech., Xi′an 710055, China；2. Key Lab of Structural Engineering and Earthquake Resistance, Ministry of Education (XAUAT), Xi′an 710055, China; 3. Department of Architecture and Surveying Engineering, Shaanxi College of Communications Technology, Xi′an 710018, China）
关键词:
古建筑木结构; 柱头科斗栱; 开裂残损; 抗震性能; 数值模拟
Keywords:
ancient timber structures;  DouGong bracket at columns;  cracking damage;  seismic performance;  numerical simulation
分类号:
TU366.2
DOI:
10.15986.j.1006-7930.2024.05.001
文献标志码:
A
摘要:
为研究构件开裂对斗栱抗震性能的影响，以沈阳故宫颐和殿柱头科斗栱为原型，建立了大斗、正心瓜栱、单翘及散斗分别开裂的斗栱有限元模型，通过体积损失率表征构件的开裂程度，对开裂斗栱开展抗震性能模拟分析. 结果表明：不同开裂程度下，斗栱的滞回曲线及骨架曲线变化规律相似. 大斗、单翘和散斗体积损失率达到3%时，加载后期滞回曲线发散明显，且散斗开裂斗栱的正向峰值位移小于其他开裂斗栱. 散斗开裂斗栱的正向刚度、大斗开裂斗栱的负向刚度随体积损失率变化较为明显. 当构件体积损失率为3%时，散斗开裂斗栱的正向承载力和大斗开裂斗栱的负向承载力退化最严重，退化率分别为1690%和 1861%；构件开裂尽管降低了斗栱的承载力及刚度，但其变形和耗能能力较好.
Abstract:
To study the impact of component cracking on the seismic performance of DouGong (DG) brackets, the DG bracket at columns of the Yihe Hall in Shenyang Imperial Palace was selected as the structural prototype, and DG bracket finite element models with cracking in DaDou, ZhengxinguaGong, DanQiao, and SanDou were established respectively. The seismic performance of cracked DG brackets was simulated and analyzed by using the volume loss rate to characterize the cracking degree of components The results show that the hysteretic curve and skeleton curve of each DG bracket are similar under different cracking degrees. When the volume loss rate of DaDou, DanQiao, and SanDou reaches 3%, the hysteretic curve diverges obviously at the later loading stage, and the positive peak displacement of the cracked SanDou DG bracket is smaller than other cracked DG brackets. The positive stiffness of DG brackets with cracked SanDou and the negative stiffness of DG brackets with cracked DaDou change obviously with the volume loss rate. When the volume loss rate reaches 3%, the degradation rates of the positive bearing capacity of DG brackets with cracked SanDou, and the negative bearing capacity of DG brackets with cracked DaDou are seriously degraded, with degradation rates of 16.90% and 18.61% respectively. Although component cracking reduces the bearing capacity and stiffness of the DG brackets, they still have good deformation and energy dissipation ability.

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备注/Memo

备注/Memo:
收稿日期:20240429修回日期:20240810
基金项目:国家自然科学基金(52278317)
第一作者:薛建阳（1970—），男，工学博士，教授，主要从事木结构抗震及钢与混凝土组合结构研究. Email: jianyang_xue@163com

更新日期/Last Update: 2024-11-21