To study the flexural behavior, ultimate bearing state and laws of internal force redistribution of prestressed concrete continuous beams cast by different construction methods, the model tests for three pieces of the continuous beams were carride out, in which three kinds of the construction methods, such as those of lowering formwork supports at one time, transferring simply-supported structure into the continuous one and casting the beam by cantilever construction, were considered 摘要为研究不同施工方法下预应力混凝土连续梁的弯曲性能、极限受力状态及内力重分布规律,进行了3根连续梁模型试验,分别考虑一次落架、简支变连续和悬臂施工3种施工方法。