华南理工大学学报（自然科学版）2025，Vol.53Issue(2)：107-114,8.DOI:10.12141/j.issn.1000-565X.240124
两种加固方式下震损木框架的抗侧移性能
Lateral Resistance Performance of Damaged Timber Frames with Two Reinforcement Methods
摘要
Abstract
Fiber-reinforced polymer(FRP)reinforcement and self-tapping screw reinforcement are two commonly used methods for strengthening timber structures.Currently,research on reinforced glued laminated timber(glulam)structures primarily focuses on changes in strength after reinforcement,with relatively limited data on lateral resistance performance.Moreover,studies on reinforcing earthquake-damaged glulam frames are scarce.To investigate the lateral resistance performance of earthquake-damaged glued laminated timber(glulam)frames rein-forced using different methods,two earthquake-damaged glulam frames were strengthened separately with carbon fiber-reinforced polymer(CFRP)and self-tapping screws,along with the addition of diagonal braces.The specimens were subjected to horizontal cyclic loading,and the experimental results were compared and analyzed.The test re-sults indicate that both reinforcement methods effectively prevented the longitudinal splitting of the timber.How-ever,compared to the specimen reinforced by self-tapping screw,the specimen reinforced by fiber-reinforced poly-mer shows significantly higher initial stiffness and peak load-carrying capacity,which can better suppress the development of cracks.The hysteretic curves of both frames exhibit a relatively anti"S"shape,with an obvious pinching effects.On the basis of the tests,simplified models of two frames were established using Open Sees.The models were calibrated based on experimental data.The hysteretic curves obtained from the calibrated models were in good agreement with the experimental results,verifying the accuracy and rationality of the model and laying the foundation for further parameter analysis.Furthermore,the influence of gravity loading for the specimens on the elastic stiffness and the maximum loading capacity was also investigated.It indicates that gravity load has an unde-niable impact on the lateral resistance performance of timber frames,providing a scientific parameterized analysis for the seismic damage of reinforced timber frames.关键词
震损木框架/纤维增强聚合物加固/自攻螺钉加固/滞回曲线/参数分析Key words
damaged timber frame/fiber-reinforced polymer reinforcement/self-tapping screw reinforcement/hysteresis curve/parameter analysis分类
建筑与水利引用本文复制引用
曹纪兴,韩梦凡,包超,何海杰,刘应扬..两种加固方式下震损木框架的抗侧移性能[J].华南理工大学学报（自然科学版）,2025,53(2):107-114,8.基金项目
国家自然科学基金项目(523680440) （523680440）
宁夏回族自治区重点研发计划项目(2021BEG03022) （2021BEG03022）
宁夏自然科学基金优秀青年项目(2023AAC05015) Supported by the National Natural Science Foundation of China(52368044),the Key Research and Development Program of Ningxia(2021BEG03022)and the Outstanding Youth Program Natural Science Foundation of Ningxia(2023AAC05015) （2023AAC05015）
