在混凝土結構物特别是大体积結構物如混凝土高坝中,温度应力非常重要,常常是影响結構物安全度的主要因素之一。但按彈性理論計算溫度应力,往往不足以反映結構物中的真突应力狀态,因为在外界溫度变化过程中,混凝土会發生徐变以适应温度变形,使应力降低,出現所謂应力松弛現象;因此,研究徐 In concrete structures, especially large structures such as concrete high dam, temperature stress is very important and often is one of the main factors affecting the safety of structures. However, calculating the thermal stress according to the elastic theory is often not enough to reflect the true stress state in the structure. Because the concrete will creep to adapt to the temperature deformation and reduce the stress during the change of the external temperature, the so-called stress relaxation occurs. Therefore, research Xu