An experimental investigation into effects of blast-induced vibration on strength of early-age concrete
-
摘要: 以某大型全碎石填方机场工程为背景,针对早龄期混凝土受爆破振动损伤开展了实验研究。通过室内实验模拟场地爆破振动作用于早龄期混凝土试块,测量了不同龄期混凝土受振损伤后的强度。并将实验结果与有限元数值计算和现场爆破场地测试数据相结合,分析了早龄期混凝土损伤后的强度增长规律,建立了场地爆破与混凝土结构浇筑平行施工的安全技术指标。Abstract: By taking a large airport engineering as an example, the damages to early-age concretes under blasting vibration were experimentally investigated. Pendulum experiments were carried out on the C30 plain concrete cubic specimens at different ages. And the uniaxial compression experiments were conducted on the two groups of concrete cubic specimens, which were subjected to the same impact loads at the same ages, at 18 and 28 days of the same water curing, respectively. The corresponding uniaxial compressive strengths were measured. The results show that the curing time can affect the uniaxial compressive strengths of early-age concretes exposed to blasting vibration and blasting vibration can more obviously decrease the uniaxial compressive strengths of 3-5 days old concretes. Based on the above experimental results, the compressive strength evolution of early-age concretes subjected to blasting vibration at different curing ages was revealed by combining with the site test and the numerical simulation. And the security technology indexes were proposed for large engineering construction projects consisting of concreting and blasting.
期刊类型引用(7)
1. 赵永青,余毅磊,高光发,王永刚,蒋招绣. 超高强钢弹侵彻陶瓷复合靶数值模拟研究. 宁波大学学报(理工版). 2025(01): 54-62 . 百度学术
2. 王维占,景彤,李红莉,孟凡高,郑灿杰,赵太勇. 高速侵彻下脆性金属弹丸损伤特性研究. 振动与冲击. 2025(06): 113-120 . 百度学术
3. 王伯通,褚庆国,武一丁,王晓东,余毅磊,周玄,高光发. 不同陶瓷厚度复合靶的抗侵彻行为研究. 弹道学报. 2024(04): 30-38 . 百度学术
4. 武一丁,高光发,王晓东. 不同速度下B_4C陶瓷/铝合金轻型复合靶板抗侵彻行为研究. 南京理工大学学报. 2023(04): 503-513 . 百度学术
5. 武一丁,王晓东,余毅磊,马铭辉,陆文成,高光发. 纤维背板结构对B_4C陶瓷复合装甲抗侵彻破碎特性的影响. 爆炸与冲击. 2023(09): 181-193 . 本站查看
6. 马铭辉,武一丁,王晓东,余毅磊,周玄,高光发,褚庆国. Kevlar纤维及碳纤维背衬下SiC陶瓷和弹丸的破碎特性. 高压物理学报. 2023(06): 120-128 . 百度学术
7. 王明扬,郑宇轩,李天鹏,程春,王远超. 分段弹芯对陶瓷/钢复合装甲的侵彻行为. 兵工学报. 2023(12): 3667-3675 . 百度学术
其他类型引用(1)
-
计量
- 文章访问数: 2792
- HTML全文浏览量: 82
- PDF下载量: 377
- 被引次数: 8