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摘要: 针对多孔泡沫混凝土实验应力应变曲线的基本特点,提出并建立了一种可以考虑孔隙压实过程的 材料本构模型及其数学形式。通过典型算例,分析了应力波在多孔材料中传播的耗散效应,指出多孔材料中 的孔隙在被压实过程中能有效吸收应力波能量、降低应力波强度,在引起应力波衰减的诸因素中,孔隙压实所 起的作用更大更显著。Abstract: Basedonthestress-straincurvesoffoam-concrete,aconstitutive modeltodescribethe processofporecollapseofporousmaterialisproposed.Thebehaviorofuniaxialstrainwavepropagatedinfoam- concretewasnumericallysimulated,andtheattenuationeffectsofthepeakstressandthe peakenergyofthestresswaveswerestudied.Theresultsshowthatthefoam-concretehasstrongcapabilitytoabsorbthestresswaveinthestageofporecollapse, andthefactorcausedbyporecollapse isthemostimportantandsignificantfactorleadingtothestresswaveattenuation.
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