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CRTSII型水泥乳化沥青砂浆力学性能的应变率效应及模型

DOI: 10.7521/j.issn.0454-5648.2014.08.06

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Abstract:

研究了CRTSII型水泥乳化沥青砂浆(CA砂浆)应力-应变关系的应变率效应,利用统计损伤力学的方法建立了CA砂浆的应变率本构模型。结果表明随着应变率的提高,CA砂浆通过增加应力和产生更多细小裂纹来抵消和耗散外部能量,CA砂浆的抗压强度增大,破坏时的贯通裂纹增多,碎裂程度增大;CRTSII型CA砂浆力学性能的应变率效应低于CRTSI型CA砂浆的。用建立的应变率本构模型对CRTSII型CA砂浆的应变率效应进行拟合,其结果与实验结果的相关系数均大于0.98,对CRTSI型CA砂浆的拟合结果与实验结果的相关系数均大于0.97,拟合结果与实验结果在峰值强度前的相关性较好,峰值强度后的相关性相对较差。

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