结构胶长期力学性能及其时间-应力等效性研究

Study on Long-term Mechanical Properties of Structure Sealant and Its Time-Stress Equivalence

为探讨长期荷载作用下结构胶蠕变特性,在不同的外加荷载下,进行了结构胶的室内蠕变实验,获得了结构胶的蠕变关系曲线的变化特征,并进行了综合对比分析。利用时间-应力等效原理分析了结构胶的非线性蠕变行为,得到了参考应力下的蠕变主曲线,拟合得到了蠕变主曲线的表达式,从而可以通过较高应力水平下的短期蠕变行为来预测较低应力水平下的长期蠕变行为。

To investigate the creep characteristics of structure sealant, indoor creep experiments are taken in different external load and the relationship curves of creep for structure sealant are obtained and comparatively analyzed. Nonlinear behavior of creep is analyzed by the time stress equivalence principle and main creep curves under reference stress are obtained, as well as the expression of main creep curves. So the long-term creep behavior under low stress can be predicted by short-term creep behavior under high stress.