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预应力混凝土迭合梁(以后简称预应力迭合梁)是在预制的预应力构件上加浇一层现浇混凝土而形成的一种装配整体结构。它具有整体刚度好、抗震性优越、能节省三材且施工简便等突出优点,在国内外土建工程上的采用日趋广泛。这种结构由于具有二阶段制造和二次受力的特点,其受力性能与整浇梁相比有较大的差别。多年来欧美及苏联一些知名学者,对迭合梁、板结构进行了深入研究,但大都是在一次受力情况下进行试验研究的,未能反映迭合梁二次受力的性能。
Prestressed concrete laminated beams (hereinafter referred to as prestressed laminated beams) are prefabricated prestressed components that are formed by pouring a layer of cast-in-place concrete to form an assembled monolithic structure. It has the outstanding advantages of good overall rigidity, superior shock resistance, ability to save three materials, and easy construction. It has been widely used in civil engineering projects at home and abroad. This structure has the characteristics of two-stage manufacturing and secondary force, and its force performance is quite different from that of the entire beam. Over the years, some well-known scholars from Europe, America and the Soviet Union have conducted in-depth studies on laminated beams and slab structures. However, most of them have been conducted experimental studies under one loading condition, failing to reflect the secondary force performance of laminated beams.