山东建筑大学学报2025，Vol.40Issue(2)：1-10,10.DOI:10.12077/sdjz.2025.02.001
复合加固方形木柱的抗震性能试验研究
Experimental study on seismic performance of composite-reinforced square timber columns
摘要
Abstract
To enhance the load-bearing capacity and seismic performance of timber columns in wood-structured buildings,this study proposes a composite reinforcement method using near-surface mounted steel bars and externally wrapped carbon fiber reinforced polymer(CFRP)sheets.Low-cycle repeated loading tests were conducted on eight square timber columns to investigate the effects of different reinforcement methods,varying amounts of steel bars,and CFRP reinforcement on seismic performance.The study evaluates the seismic behavior of the composite-reinforced square timber columns based on test observations,failure modes,lateral bearing capacity,hysteretic behavior,ductility,stiffness and strength degradation,and energy dissipation capacity.The results indicate that,compared to unreinforced timber columns,the lateral bearing capacity and energy dissipation capacity of columns reinforced solely with embedded steel bars increased by 46%and 74%,respectively.The external CFRP wrapping effectively restricted lateral strain in the timber and limited the outward bulging of the embedded steel bars,thereby improving ductility and mitigating stiffness degradation in square timber columns.Furthermore,the composite reinforcement method achieved a maximum increase of 62%in lateral bearing capacity and 181%in energy dissipation capacity,while also enhancing stiffness and strength retention,demonstrating a significant improvement in seismic performance.关键词
方形木柱/复合加固/内嵌钢筋/外包CFRP布/抗震性能/低周反复荷载试验Key words
square timber column/composite-reinforced/embedded steel bars/external CFRP wrapping/seismic performance/low-cycle repeated loading test分类
土木建筑引用本文复制引用
周长东,闫佳玲..复合加固方形木柱的抗震性能试验研究[J].山东建筑大学学报,2025,40(2):1-10,10.基金项目
国家自然科学基金项目(52078030,51678039) （52078030,51678039）
