摘要
为研究冻融循环作用对钢筋混凝土梁受弯性能的影响,开展了快速冻融循环试验,接着对冻融后的梁进行了静载试验。量测了荷载-挠度曲线、截面应变及抗弯刚度。结果表明:在冻融循环作用下,随着冻融次数的增加,抗弯刚度和极限承载力均呈下降趋势,极限状态下试件梁中和轴不断下移,受压区高度有明显增大趋势。
An experimental research was performed on the flexural behavior of reinforced concrete beams after exposure to freeze-thaw cycles. The stiffness, ultimate bearing capacity, concrete stain distri- bution across the depth of section, and load-deflection curve of the frozen-thawed beams were meas- ured. The results showed that with the increase of the freeze-thaw cycles, the stiffness and the ultimate bearing capacity decreases, the neutral axis moves down at the ultimate load and the depth of compression zone increases significantly.
出处
《低温建筑技术》
2014年第4期42-45,共4页
Low Temperature Architecture Technology
基金
国家自然科学基金项目(51108413)
中央高校基本科研业务费专项资金资助(2012QNA4016)
关键词
冻融循环
钢筋混凝土梁
受弯性能
freeze-thaw cycles
reinforced concrete beams
bending performance
