为了满足城乡建设发展和节约用地的需要,多层框架结构在工业与民用建筑中的比重有逐年增加的趋势;而钢筋混凝土梁柱式框架则是其中最常用的、量大面广的结构形式。当框架跨度较大时,采用预应力混凝土结构能收到比较明显的节约材料、改善结构受力性能的效果。例如,在工程中经常遇到的单跨多层框架就属于这种情况。这类框架 In order to meet the needs of urban and rural construction and development and land-saving needs, the proportion of multi-story frame structures in industrial and civil buildings has increased year by year; and reinforced concrete beam-column frames are among the most commonly used and widely used structural forms. . When the frame span is large, the prestressed concrete structure can receive more obvious material-saving effects and improve the mechanical performance of the structure. This is the case, for example, for single-span multi-story frames that are often encountered in engineering. This type of framework