预应力CTRC板加固预载梁弯曲性能的数值研究

Flexural Behavior of Preloaded Beam Repaired with Prestressed CTRC Plates

对预应力CTRC板加固预载梁的弯曲性能进行了试验和数值模拟研究。根据预载梁的卸载水平和持载水平设置了6个试验工况。试验和数值模拟结果表明,加固梁极限承载力的数值模拟结果与试验结果接近。与未加固的模拟梁相比,加固梁的极限承载力模拟值明显提高,极限承载力模拟值提高的最大比例为74.0%,但卸载水平和持载水平对加固梁的极限承载力影响较小。试验结果和数值模拟结果的对比证明了预应力CTRC板加固预载梁数值模拟的有效性和准确性。

In this paper,flexural behavior of preloaded reinforced concrete(RC)beams repaired with prestressed carbon textile reinforced concrete plates was studied by experiment and numerical simulation.Six cases were set according to the unloading level and the sustaining load level of preloaded beams.The experimental results and numerical simulation results showed that the numerical simulation results of ultimate load of repaired beams are smaller than the test results but the relative error between them is within 6.0%.Compared to the simulated unstrengthed beam,ultimate load of simulated repaired beam was improved significantly and the maximum increasing rate of ultimate load reached 74%,but the unloading level and the sustaining load level have little influence on the ultimate load of repaired beams.The comparison between the experimental results and the numerical simulation results proves the validity and accuracy of the numerical simulation of the prestressed CTRC plate in the reinforcement of preloaded beams.