预应力小箱梁混凝土设计应力值与实际应力值对比研究

Compare with Design Stress of Pre-Stressed Concrete Small Box Beam and Real Stress

利用实际工程的25 m预应力混凝土小箱梁的预制过程中,埋设了混凝土应变计,预应力钢束张拉过程中,实时检测了混凝土瞬时实际应变,同时测试了混凝土的弹性模量,准确计算出混凝土实际应力,并与设计计算的混凝土应力进行对比分析。

During prefabricate of 25m pre-stressed concrete small box beam in the project, burying the concrete strain gauge. Testing instantaneous stress of the concrete at real time when tension the pre-stressed steel strand, and at the same time, testing the elastic modulus of the concrete, calculate the real stress of the concrete, and compare with the calculated the stress of the concrete.