低温/常温养护下混凝土的本构模型和抗爆试验

宁建国; 杨帅; 李玉辉; 许香照

doi:10.12382/bgxb.2022.1019

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低温/常温养护下混凝土的本构模型和抗爆试验

更新时间：2025-08-18

- 低温/常温养护下混凝土的本构模型和抗爆试验
- Constitutive Model and Blast Resistance Test of Concrete under Low/Room Temperature Curing
- 兵工学报 2023年44卷第10期页码：2932-2943
- 作者机构：
  
  北京理工大学爆炸科学与技术国家重点实验室, 北京 100081
- 作者简介：
  
  *邮箱: xzxu@bit.edu.cn
- 基金信息：
  
  国家自然科学基金项目(12032006)
- DOI：10.12382/bgxb.2022.1019
  中图分类号：
- 收稿：2022-11-02，
  
  网络首发：2023-12-15，
  
  纸质出版：2023-10-30
- 稿件说明：
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宁建国, 杨帅, 李玉辉, 等. 低温/常温养护下混凝土的本构模型和抗爆试验[J]. 兵工学报, 2023,44(10):2932-2943.

Jianguo NING, Shuai YANG, Yuhui LI, et al. Constitutive Model and Blast Resistance Test of Concrete under Low/Room Temperature Curing[J]. Acta Armamentarii, 2023, 44(10): 2932-2943.
宁建国, 杨帅, 李玉辉, 等. 低温/常温养护下混凝土的本构模型和抗爆试验[J]. 兵工学报, 2023,44(10):2932-2943. DOI： 10.12382/bgxb.2022.1019.

Jianguo NING, Shuai YANG, Yuhui LI, et al. Constitutive Model and Blast Resistance Test of Concrete under Low/Room Temperature Curing[J]. Acta Armamentarii, 2023, 44(10): 2932-2943. DOI： 10.12382/bgxb.2022.1019.

摘要

混凝土材料的力学性能与养护环境紧密相关

受施工环境的限制

部分混凝土构件需要在高海拔、高寒等低温环境下浇筑成型。为研究低温/常温养护下混凝土的力学性能和抗爆能力

开展多组低温/常温养护下混凝土材料的单轴抗压测试试验。结合单轴抗压测试试验结果引入与养护时间相关的损伤演化函数

修正塑性流动因子

并建立低温/常温养护下混凝土的本构模型。通过混凝土的爆炸冲击试验对比常温养护和低温养护下混凝土的抗爆性能。研究结果表明:低温养护下混凝土材料的抗压强度约为常温养护下的34.6%~56.8%

且混凝土的抗压强度与养护时间呈正相关关系

与试件内部含水率呈负相关关系;新建立的混凝土本构模型可以对低温/常温养护下混凝土的力学性能进行有效预测;低温养护成型后混凝土的抗爆性能有所降低

但仍具有明显的抗爆能力。

Abstract

The mechanical properties of concrete materials are closely related to the curing environment. Limited by the construction environment

some concrete structures are poured and formed at high altitudes or in cold

low-temperature conditions. In this work

several uniaxial compressive tests are conducted on concrete specimens cured at both low and room temperatures to study their mechanical properties and blast resistance. Based on the results of these tests

the damage evolution function related to the length of curing is introduced

the plastic flow factor is modified and the constitutive model of concrete under low/room temperature curing is established to predict the mechanical properties of concrete. Blast impact tests of concrete are conducted to compare the blast resistance of concrete blocks under low/room temperature curing. The research results show that: the compressive strength of concrete materials under low-temperature curing is about 34.6%~56.8% of that under room temperature curing. Compressive strength is positively correlated with the length of curing and negatively correlated with the internal moisture of the specimens. The mechanical properties of concrete under low/room temperature curing can be effectively predicted by the established concrete constitutive model. The blast resistance of concrete formed by low-temperature curing is reduced

but it still exhibits notable blast resistance capabilities.

关键词

Keywords

references

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