建筑结构学报2013，Vol.34Issue(7)：119-124,6.
无黏结材料对全钢屈曲约束支撑受力性能影响的试验研究
Experimental research on effect of unbonding material on mechanical behavior of all-steel buckling-restrained brace
摘要
Abstract
Two all-steel BRB specimens with identical dimensions were designed in the experiment and only one specimen employed the unbonding material between the core plate and the restraining members.Static cyclic loading tests of the two specimens were performed in order to evaluate the effect of the unbonding material on the all-steel BRB's performance,including the failure mode,hysteretic behavior,compression strength adjustment factor and residual deformation.It is concluded from test results that two BRB specimens have good low-cycle fatigue performance.Moreover,the number of cycle of the BRB with the unbonding material under the constant loading amplitude increases by 21％,which shows that its low-cycle fatigue performance is better than the BRB without the unbonding material.The compression strength adjustment factor of the BRB without the unbonding material is much greater than one with the unbonding material.The unbonding material can decrease the frictional force between the core plate and the restraining members and can prevent the core plate from wear.The frictional shear force causes the middle region of the yield segment to shrink and the end region to expand.This observation is very clear for the BRB without the unbonding material and its expanded core plate squeezes the fillers.关键词
全钢屈曲约束支撑/无黏结材料/拟静力试验/受力性能Key words
all-steel buckling-restrained brace/ unbonding material/ quasi-static test/ mechanical behavior分类
建筑与水利引用本文复制引用
陈泉,李涛,王春林,孟少平..无黏结材料对全钢屈曲约束支撑受力性能影响的试验研究[J].建筑结构学报,2013,34(7):119-124,6.基金项目
国家自然科学基金项目(51008077,51278105),江苏省高校优势学科建设工程资助. （51008077,51278105）
