Research on the Dynamic Compressive Performance of Concrete due to the Damage Static Load History

被引：0

作者：

Li S. ^{[1
]}

Chen Y. ^{[1
]}

Zhang M. ^{[2
]}

Xu P. ^{[3
]}

Hao J. ^{[1
]}

机构：

[1] School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing

[2] Tongzhou Municipal Commission of Urban and Rural Development, Beijing

[3] China Railway 16th Bureau Group Corporation Limited, Beijing

来源：

Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology | 2023年 / 43卷 / 05期

关键词：

damage; dynamic compressive strength; split Hopkinson pressure bar (SHPB); static load history; strain rate effect;

D O I：

10.15918/j.tbit1001-0645.2022.129

中图分类号：

学科分类号：

摘要：

To study the dynamic mechanical properties of concrete structures in service and with initial damage under impact dynamic load, concrete specimens were taken as experimental objects. First, several groups of concrete specimens were preloaded by YAD-2000 test press to varying degrees of damage. Then, the SHPB test equipment was used to perform a single impact compression test on the specimen to study the characteristics of the damage to the concrete stress-strain curve under static load, and influences of characteristics such as dynamic compressive strength and failure mode. Through a series of tests, it was found that the concrete subjected to the initial static load had a strong load damage effect and strain rate effect. There was a boundary point in the relationship between the damage of concrete under static load to the reduction of dynamic compressive strength. When it was greater than the cut-off value, the change in damage degree had a significant effect on the dynamic compressive strength of concrete. The research results have theoretical significance and reference value for the research and application of the dynamic performance of concrete under load history. © 2023 Beijing Institute of Technology. All rights reserved.

引用

页码：470 / 477

页数：7