Experimentalinvestigationondynamiccompressionmechanical performanceofconcreteathightemperature
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摘要: 利用一种新的快速加热混凝土的方法和SHPB实验系统对自制混凝土进行了不同温度下的动态 压缩初步实验,发现了混凝土在高温下的动态压缩力学性能的规律性:在高温动态压缩条件下,温度变化是影 响混凝土力学性能的主要因素,应变率的影响是次要因素。另外,该混凝土高温动态压缩破坏可以分为2种 模式(裂纹模式和破碎模式)Abstract: Anexperimentalsetupwasdevelopedforrapidheatingupconcretebasedontheprincipleof microwaveheatingandconcretespecimenswere manufactured.Dynamiccompressionexperiments wereconductedforthemanufacturedconcretespecimensbyusingasplitHopkinsonpressurebarsystematdifferenttemperatures. Theexperimentalresultsshowthattemperatureistheprimaryfactor forinfluencingthedynamiccompressionmechanicalperformanceofconcreteathightemperatureand strainrateistheminorfactor.Underdynamiccompression,theconcretedamageathightemperature canbedividedintocrackandfracturemodes.
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Key words:
- solid mechanics /
- mechanicalbehavior /
- rapidheatingup /
- concrete /
- hightemperature /
- SHPB
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