二次受力下BFRP加固RC简支梁抗弯性能有限元分析

Finite Element Analysis on Anti-bending Behavior of RC Simply Supported Beams with BFRP Sheets under the Secondary Load

采用软件ABAQUS建立BFRP加固RC梁三维数值模型来研究二次受力条件下BFRP加固RC简支梁的抗弯性能,并系统研究了预载程度、配筋率、加固量等因素对二次受力下加固梁加固效果的影响.结果表明,初始荷载和配筋率的改变对二次受力下RC简支梁的抗弯性能影响显著,且BFRP布加固RC简支梁存在最佳配布率,数值模拟分析结果与试验结果高度一致,从而证明本文方法的可靠性及正确性.研究成果对实际工程修复及加固理论具有一定的借鉴意义.

In order to study the bending load capacity of the second-load RC simply-supported beam which is strengthened with BFRP,a finite element model is established by using ABAQUS to analyze systematically the effects of pre-loading degree,steel percentage,BFRP layers and other factors on strengthening beams.The results show that it has a great effect on the flexural behavior of RC simple beams under the secondary load to change the pre-load and steel percentages.In addition,there is a reasonable distribution rate in the field of study on RC simply supported beams strengthened with BFRP.The numerical simulation results are highly consistent with the experimental results,which proves the reliability and correctness of the method proposed.The research results have reference value for the actual engineering rehabilitation and reinforcement theory.