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通过对两榀双层双跨钢筋混凝土叠合框架（KJ—1，KJ—2）和-榀整浇框架（KJ—3）的试验，分析了叠合框架梁的受力性能，提出了叠合框架梁叠合面破坏机理及防止叠合面破坏的构造措施，证实了二次受力叠合框架梁中仍然存在荷载预压应力区，它对叠合梁抗剪有利。
Through the tests of two-ply double-span double-span reinforced concrete superimposed frames (KJ-1, KJ-2) and pluton-casting frames (KJ-3), the mechanical properties of the composite frame beams were analyzed and a stack was proposed. The structural failure mechanism of the composite beam and the structural measures to prevent the collapse of the surfacing surface confirmed that the preloaded stress region still exists in the superposed composite frame beam, which is beneficial to the shear resistance of the composite beam.