复合加固方形木柱的抗震性能试验研究  

Experimental study on seismic performance of composite-reinforcedsquare timber columns

作　　者：周长东[1,2] 闫佳玲 ZHOU Changdong;YAN Jialing(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Beijing's Key Laboratory of Structural Wind Engineering and Urban Wind Environment,Beijing 100044,China;Beijing Capital Development Holding(Group)Co.,Ltd.,Beijing 100101,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]北京交通大学结构风工程与城市风环境北京市重点实验室,北京100044 [3]北京首都开发控股(集团)有限公司,北京100101

出　　处：《山东建筑大学学报》2025年第2期1-10,共10页Journal of Shandong Jianzhu University

基　　金：国家自然科学基金项目(52078030,51678039)。

摘　　要：为了有效提升木结构建筑中木柱构件的承载能力和抗震性能,文章提出采用内嵌钢筋外包碳纤维(Carbon Fiber Reinforced Polymer, CFRP)布复合加固木柱,并通过8根方形木柱的低周反复荷载试验,研究不同加固模式、钢筋用量、CFRP布加固量等因素对木柱抗震加固效果的影响,并从试验现象、破坏形态、侧向承载力、滞回性能、延性、刚度和强度退化,以及耗能能力等方面分析复合加固方形木柱的抗震性能。结果表明:相比于未加固木柱,仅内嵌钢筋加固木柱的侧向承载力和耗能能力最大分别提升了46%和74%;外包CFRP布能够限制木材横向应变和内嵌钢筋的外凸,提高了方形木柱的延性性能,降低了其刚度退化;复合加固方形木柱的侧向承载力、耗能能力分别最大提升了62%和181%,同时改善了其刚度和强度退化性能,显著增强了抗震加固效果。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 

分 类 号：TU366.2[建筑科学—结构工程]