东南大学学报（自然科学版）2017，Vol.47Issue(6)：1174-1179,6.DOI:10.3969/j.issn.1001-0505.2017.06.015
高温下重组竹顺纹销槽承压强度试验研究
Experimental study on embedding strength of bamboo scrimber parallel to grain at high temperatures
摘要
Abstract
To study the effect of temperature on the embedding strength of bamboo scrimber,a total of 42 compressive specimens were tested from the beginning of monotonic loading to failure by the steady-state test method.The results indicate that the embedding strength of the bamboo scrimber parallel to the grain is 75.2 MPa at 20 ℃.With the temperature increasing from 20 ℃ to 110 ℃,the embedding strength of the bamboo scrimber decreases gradually.Due to the evaporation of inherent water and energy consumption,the embedding strength locally increases in the temperature range from 110 ℃ to 170 ℃.As the temperature increases from 170 ℃ to 270 ℃,the embedding strength decreases due to the thermal decomposition of fibre bundles.And,the embedding strength is 9.6 MPa at 270 ℃.The relationship between the bearing yield load of the bamboo scrimber and the temperature was determined by the 5％ diameter offset method.Four typical failure modes were provided in different temperature ranges.Through comparing different national standards and literature,the equation for expressing the embedding strength of the bamboo scrimber parallel to the grain at high temperatures was established.This study provides a valuable reference for calculating the bearing capacity of the bolted connection exposed to fire.关键词
重组竹/高温试验/销槽承压强度/破坏模式Key words
bamboo scrimber/high temperature test/embedding strength/failure mode分类
建筑与水利引用本文复制引用
崔兆彦,王飞,徐明,陈忠范..高温下重组竹顺纹销槽承压强度试验研究[J].东南大学学报（自然科学版）,2017,47(6):1174-1179,6.基金项目
国家“十二五”科技支撑计划资助项目(2015BAL03B02-02)、江苏省自然科学基金资助项目(BK20151406). （2015BAL03B02-02）
