高温下混凝土冲击加载试验研究

李志武; 许金余; 戴双田; 白二雷; 高志刚

doi:10.11858/gywlxb.2013.03.016

高温下混凝土冲击加载试验研究

doi: 10.11858/gywlxb.2013.03.016

1.
空军工程大学工程学院机场建筑工程系，陕西西安 710038；
2.
西北工业大学力学与土木建筑学院，陕西西安 710072；
3.
成都军区空军勘察设计院，四川成都 610041

详细信息

通讯作者:
李志武 E-mail:leezhiwu@163.com

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出版历程
- 收稿日期: 2011-07-06
- 修回日期: 2011-12-11
- 刊出日期: 2013-06-15

Experimental Study on Concrete Exposed to High Temperature under Impact Loading

1.
The Engineering Institute, Air Force Engineering University, Xi'an 710038, China;
2.
Department of Civil Engineering, Northwestern Polytechnical University, Xi'an 710072, China;
3.
Chengdu Military Region Air Force Survey and Design Institute, Chengdu 610041, China

摘要

摘要: 在传统的分离式霍普金森压杆（Split Hopkinson Pressure Bar，SHPB）装置的基础上，通过加装管式电阻炉等手段，获得了一套用于测量材料在高温下动态压缩力学性能的SHPB系统，并对200~800 ℃高温下混凝土进行了冲击加载试验，得到了应力-应变关系曲线。研究结果表明，该高温SHPB试验系统可用于研究高温下混凝土的动力特性；混凝土在不同温度下的动态抗压强度、峰值应变随着弹速的增加都有一定程度的提高；高温对混凝土动力特性影响显著，随着温度的提高，峰值应变随之增加，而动态抗压强度呈现先增后微降、600 ℃后迅速下降的趋势。
- 混凝土 /
- 高温 /
- 分离式霍普金森压杆（SHPB） /
- 动力特性
Abstract: Based on the traditional spilt Hopkinson pressure bar (SHPB) apparatus, a SHPB system for testing dynamic compressive properties of materials exposed to high temperature was established after adding a tubular electric furnace, and the dynamic compressive stress-strain curves of concrete at 200-800 ℃ were measured using the system. The results show that the SHPB experimental system can be used to test the dynamic properties of concrete exposed to high temperature; Dynamic compressive strength and critical strain of concrete at different temperatures increase with the rise of projectile velocity; Effects of high temperature on dynamic properties of concrete are remarkable: the critical strain increases with the temperature increasing, dynamic compressive strength increases firstly and then decreases slightly, and decreases rapidly after 600 ℃.
- concrete /
- high temperature /
- spilt Hopkinson pressure bar (SHPB) /
- dynamic property

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参考文献(19)

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