基于不同开孔位置RC梁受弯性能试验

Tests for bending properties of RC beams based on different opening positions

为了探究开孔水平位置对RC梁受弯承载力的影响,通过物理试验方法对一批RC梁进行受弯加载试验,在梁腹部纯弯段和剪弯段分别开孔以探究RC梁的受弯性能.在梁腹部设置不同的开孔位置参数,并运用有限元软件ABAQUS进行模拟计算.结果表明:数值模拟结果与试验结果具有较好的一致性,验证了有限元模拟的正确性.在梁腹部不同位置进行开孔对RC梁受弯承载力的影响不同,梁腹部纯弯段开孔对RC梁的受力性能影响不大,而剪弯段开孔会使梁的抗弯能力明显降低.

In order to investigate the effect of horizontal opening position on the flexural bearing capacity of RC beams,a batch of RC beams were subjected to the flexural loading through physical tests,and the bending properties of RC beams were investigated at both pure bending and shear bending sections on the bellies of beams. In addition,different parameters for opening positions were set for the bellies of beams,and finite element software ABAQUS was used for simulation and calculation. The results show that the numerical simulation results are consistent with the experimental results,proving the correctness of finite element simulation. Different opening positions on the bellies of RC beams have different influences on the flexural bending capacity of RC beams,the openings at pure bending section on the bellies of beams have less effect on the mechanical performance of RC beams,while the openings at shear bending section can obviously reduce the bending resistance.