上海交通大学学报 ›› 2022, Vol. 56 ›› Issue (9): 1208-1217.doi: 10.16183/j.cnki.jsjtu.2021.343
赵洪1,2, 谢友均1, 龙广成1(), 李宁1, 张嘉伟3, 程智清1
收稿日期:
2021-09-10
出版日期:
2022-09-28
发布日期:
2022-10-09
通讯作者:
龙广成
E-mail:565410408@qq.com
作者简介:
赵 洪(1988-),男,湖南省祁阳市人,博士生,从事混凝土结构耐久性研究.
基金资助:
ZHAO Hong1,2, XIE Youjun1, LONG Guangcheng1(), LI Ning1, ZHANG Jiawei3, CHENG Zhiqing1
Received:
2021-09-10
Online:
2022-09-28
Published:
2022-10-09
Contact:
LONG Guangcheng
E-mail:565410408@qq.com
摘要:
为研究冲击荷载下板式无砟轨道结构蒸养混凝土与自密实混凝土层间界面的破坏行为,利用分离式霍普金森杆(SHPB)对含黏结界面混凝土进行冲击试验,并就其破坏特征和应力应变全曲线特性以及损伤本构方程进行探讨.结果表明:含黏结界面混凝土在动态冲击荷载作用下存在界面脱黏分离和整体破碎两种失效模式.界面脱黏分离失效模式下,随着应变率的增加,含黏结界面混凝土的动态抗压强度、强度动态提高因子(DIF)、峰值应变、冲击韧性均增加,具有明显的应变率敏感性;整体破碎失效模式下,界面脱黏变形和破碎变形同时存在,随着应变率的增加,裂纹向界面区域累积、拓展,界面起到了能量缓冲的作用,此时含黏结界面混凝土动态抗压强度、DIF基本不变,而峰值应变和冲击韧性增加.所建立的基于Weibull分布的本构模型与试验结果吻合较好,尤其对峰前应力应变曲线有很好的匹配性.
中图分类号:
赵洪, 谢友均, 龙广成, 李宁, 张嘉伟, 程智清. 冲击荷载作用下含黏结界面混凝土破坏特征与应力应变分析[J]. 上海交通大学学报, 2022, 56(9): 1208-1217.
ZHAO Hong, XIE Youjun, LONG Guangcheng, LI Ning, ZHANG Jiawei, CHENG Zhiqing. Mechanical Characteristics and Stress and Strain Analysis of Concrete with Bonding Interface Under Impact Load[J]. Journal of Shanghai Jiao Tong University, 2022, 56(9): 1208-1217.
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