【摘要】 因常规土工合成材料蠕变试验持续时间长,且不能预测设计使用年限蠕变特性的缺点,为此介绍了一种加速土工合成材料蠕变试验的新方法,即时温叠加法。该方法主要原理是:在几种不同的温度下和同一种荷载水平下,做较短期的蠕变试验。沿时间轴水平移动非参考温度下的蠕变曲线段使之与参考温度下的曲线图光滑连接,形成一条光滑的主曲线图。利用主曲线图就可以确定土工合成材料长期的蠕变特性。在阐述了时温叠加法发展历史的基础上,主要介绍了该法的步骤以及转换因子,同时指出了该方法存在的一些问题。更多还原

【Abstract】 A method of TTS for accelerating creep testing of geosynthetics is introduced. This method can overcome the defects of conventional one which needs long time and can not forecast creep character at the end of design life. In this method only short time tests are needed to be done at different temperatures but at the same loading levels. Each of the elevated temperature curves is moved along the horizontal time axis to longer times until it superposes on the reference temperature curve as smoothly as possible and then the master creep curve is obtained. Long time creep characters of geosynthetics are determined by the master curve. The history, the principle ,the procedure and shift factors of TTS method are discussed. At last, some demerits and suggestions for their improvement are presented.更多还原