硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (6): 1937-1946.DOI: 10.16552/j.cnki.issn1001-1625.2025.1156
收稿日期:2025-11-19
修订日期:2026-01-06
出版日期:2026-06-15
发布日期:2026-07-14
通信作者:
陈江瑛,博士,教授。E-mail:chenjiangying@nbu.edu.cn作者简介:杨 恒(1999—),男,硕士研究生。主要从事超高性能混凝土的研究。E-mail:2311090038@nbu.edu.cn
基金资助:
YANG Heng1,2(
), LI Mengmeng1,2, CHEN Jiangying1,2(
)
Received:2025-11-19
Revised:2026-01-06
Published:2026-06-15
Online:2026-07-14
摘要:
在实际工程中混凝土构件不仅承受压缩载荷,还常需承受拉伸与剪切载荷,探究超高性能混凝土(UHPC)在不同应力状态及加载速率下的力学行为对结构安全性设计至关重要。本文利用万能试验机、分离式霍普金森压杆(SHPB)及自行设计的直剪装置,分别对掺入与未掺入钢纤维的UHPC开展了准静态和动态加载下的压缩、劈拉及剪切试验。结果表明:无论是在准静态还是在动态条件下,钢纤维的掺入均显著提升了UHPC的各项力学指标;掺入与未掺入钢纤维的UHPC均表现出显著的应变率强化效应。特别是在剪切试验中,钢纤维和高应变率虽然改变了应力峰值的演化特征,但并未改变试样呈Ⅰ型与Ⅱ型混合断裂的破坏模式。
中图分类号:
杨恒, 李萌萌, 陈江瑛. 基于SHPB与直剪装置的UHPC力学性能试验研究[J]. 硅酸盐通报, 2026, 45(6): 1937-1946.
YANG Heng, LI Mengmeng, CHEN Jiangying. Experimental Study on Mechanical Properties of UHPC Based on SHPB and Direct Shear Apparatus[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(6): 1937-1946.
| Premix | Water | Steel fiber | Superplasticizer | Defoamer |
|---|---|---|---|---|
| 1.000 | 0.083 | 0.088 | 0.009 | 0.002 |
表1 UHPC配合比(质量比)
Table 1 UHPC mix proportion (mass ratio)
| Premix | Water | Steel fiber | Superplasticizer | Defoamer |
|---|---|---|---|---|
| 1.000 | 0.083 | 0.088 | 0.009 | 0.002 |
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