钢-混凝土组合梁预应力施工阶段受力性能试验研究

Simulated Test Research on Mechanical Performance of Steel-Concrete Composite Beam of Prestress Construction

通过 9个钢 -预应力混凝土组合梁的模拟试验研究 ,对钢 -混凝土组合梁在预应力施工阶段的受力性能、界面滑移分布规律及主要影响因素进行了深入探讨 .试验表明 ,在钢 -预应力混凝土组合梁的预应力张拉端或锚固端的非协调工作区较小 ,钢 -混凝土组合梁设计控制区的有效预应力可按基于钢 -混凝土换算组合截面的材料力学方法计算 。

Studying by means of the simulated test of 9 prestressed composite beams,this paper profoundly inquires into the mechanical performance,the law of slip distribution at the interface,and the primary affecting factor of the composite beam at the stage of prestress construction.The test shows that the inconsistent operation section at the pretension or anchor end of the beam is rather small,the effective prestress in the design controlling region of the beam can be calculated by the material mechanics method based on steel concrete transformed composite section,and the slip at the interface can be neglected.