Uniaxial Restraint Tests under High-Stress Conditions and a Chemo-Hygral Model for ASR Expansion
Uniaxial Restraint Tests under High-Stress Conditions and a Chemo-Hygral Model for ASR Expansion
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DOI：
10.1061/9780784479346.127
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发表时间：
2015-09
期刊：
影响因子：
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通讯作者：
Y. Takahashi;K. Shibata;M. Maruno;K. Maekawa
中科院分区：
文献类型：
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作者：
Y. Takahashi;K. Shibata;M. Maruno;K. Maekawa
为利用ASR评估结构混凝土的损伤，正在开发一个合理处理多尺度化学物理事件复杂相互作用的分析平台。为了验证所提出的预测模型，ASR膨胀试验下的几个量级的限制进行，并与多尺度模拟的结果进行了比较。实验发现，高偏压缩可导致各向同性约束的ASR膨胀。基于孔隙力学的多相模型可以通过考虑混凝土复合材料中产生的ASR凝胶的准静水压力及其注入微孔来模拟这种非线性。
For evaluating damages of structural concrete by ASR, an analytical platform to rationally deal with the complex interaction of multi-scale chemo-physics events is being developed. For experimental verification of the predictive model proposed, ASR expansion tests under several magnitudes of confinement are conducted and the results are compared with the multi-scale simulation. It is experimentally found that the highly deviatoric compression may bring about isotropically confined ASR expansion. The poro-mechanics based multi-phase modeling can simulate this nonlinearity by considering the quasi-hydro static pressure of created ASR gels in concrete composites and its injection into the micro-pores.