混凝土受氯盐腐蚀后动力学特性损伤研究  

Damage and Deterioration Research on Dynamic Properties of Concrete after Chloride Corrosion

作　　者：邢小光[1] 陈震[2] 许金余[1,3] 白二雷[1] 聂良学 

机构地区：[1]空军工程大学机场建筑工程系 [2]中国人民解放军94940部队 [3]西北工业大学力学与土木建筑学院

出　　处：《硅酸盐通报》2017年第2期589-594,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金资助项目(51078350;51208507);爆炸冲击防灾减灾国家重点实验室开放课题资助(DPMEIKF201406);陕西省青年科技新星计划项目(2013KJXX-81)

摘　　要：为探究氯盐腐蚀后混凝土动力学特性,利用Φ100 mm分离式霍普金森压杆试验系统,对置于NaCl溶液中浸泡侵蚀后混凝土试件动力学特性进行研究。试验结果表明:氯盐腐蚀后试件动态抗压强度明显下降,且应变率效应显著;整体上,试件受腐蚀后的峰值应变有所降低,变形性能减弱;比能量吸收显著降低,吸能能力受到严重削弱。说明氯盐对混凝土动力学特性具有显著的弱化效应。Dynamic characteristic damage of concrete specimens which have been immersed in sodium chloride solution were studied by 100 mm split Hopkinson pressure bar（ SHPB） test device. The results show that there were different decreases to the dynamic compressive strength of the concrete that after immersed and it has a distinguishable strain rate effect. The peak strain of specimens immersed has a bit reduction with reduced deformation performance as a whole. The specific energy absorption has a significant drop after concrete specimens etched and energy absorption capability is severely weaken,which indicates that weakening effect of the dynamic mechanical properties of concrete is obvious.

关 键 词：分离式霍普金森压杆 动态抗压强度 峰值应变 比能量吸收 

分 类 号：TU528[建筑科学—建筑技术科学]