三跨预应力混凝土连续梁弯曲性能试验研究

为了研究三跨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,进行了连续梁模型试验,详细记录了模型梁从加载到破坏的混凝土应变、钢筋应变、梁的变形、支座反力和梁的内力重分布随荷载的变化规律.结果表明:连续梁在各个截面均将发生内力重分布,重分布方向总是朝着非加载跨,且重分布的最大幅度并不一定出现在结构破坏时.

Experimental Study on Flexural Behavior of 3-Span PC Continuous Beams

In order to investigate the flexural behavior , ultimate bearing state and internal force redistribution of 3-span prestressed concrete continuous beams, a model beam test has been carried out. The strain in concrete and reinforcement , the deformation of the beam, the reaction of the bearings and the bending mo- ment redistribution are described in detail. It is shown that the internal force will redistribute at each section, the redistribution direction will point to the non - load span, and the maximum range of the redistribution does not always occur at the state of collapse.