木材科学与技术2026，Vol.40Issue(2)：42-48,7.DOI:10.12326/j.2096-9694.2025146
冻融循环处理对重组竹抗压弹性模量与抗压强度的影响
Effect of Cyclic Freeze-Thaw Treatment on the Elastic Modulus and Strength of Bamboo Scrimber under Compression
摘要
Abstract
Bamboo scrimber(BS),due to its excellent mechanical properties,has been increasingly utilized in the construction industry.However,as a structural material,the degradation mechanism of BS under cyclic freeze-thaw treatment is not yet clear.This study investigated the failure modes,elastic modulus,and compressive strength of BS specimens subjected to 0,20,40,and 60 freeze-thaw(F-T)cycles(each cycle comprising freezing at-20℃for 8 hours followed by thawing in water at 20℃for 8 hours)under three loading directions,i.e.,parallel-to-grain loading,perpendicular to grain I loading(perpendicular to the glue layer),and perpendicular to grain II loading(parallel to the glue layer).The results indicated that while F-T cycling did not change the failure modes type of the specimens,it significantly altered the proportions of different failure modes.Notably,the proportion of glue layer cracking increased remarkably with increasing F-T cycles from 0 to 60(from 30%to 64%).Both elastic modulus and compressive strength decreased with an increasing number of F-T cycles across all loading directions,with a decrease of 38.3%and 35.2%in the perpendicular to grain II direction,respectively.Finally,the design characteristic value(0.05 quantile)of the compressive strength of BS was determined based on the statistical analysis of experimental data,and an attenuation model(R2＞0.95)of compressive performance with varying numbers of freeze-thaw cycles was established to provide data support for the reliability design of BS structures in cold regions.关键词
重组竹/冻融循环处理/破坏模式/抗压弹性模量/抗压强度/衰减模型Key words
bamboo scrimber/cyclic freeze-thaw treatment/failure modes/elastic modulus/compressive strength/degradation model分类
轻工纺织引用本文复制引用
邸静,伍锴杰,郭楠,梅力丹,吕佳峰,邬明桃,罗晓英,王桐..冻融循环处理对重组竹抗压弹性模量与抗压强度的影响[J].木材科学与技术,2026,40(2):42-48,7.基金项目
福建省自然科学基金面上项目"内置钢筋重组竹梁柱-混凝土节点受力机理及抗震性能研究"(2025J01593) （2025J01593）
福建省交通运输科技项目"内置槽钢重组竹公路护栏受力性能研究"(LS202304). （LS202304）
