CFRP-PCPs嵌贴加固梁的挠度计算方法研究及有限元模拟

Research on deflection calculation method and finite element simulation of reinforced beams with CFRP-PCPs

对8根梁进行试验,分别在梁的底部和侧面嵌贴CFRP-PCPs。PCPs的制作材料、嵌贴长度以及预应力各不相同,以此来研究各影响因素对梁挠度的影响,根据试验结果绘制了荷载位移曲线并进行了分析。在试验研究的基础上提出了梁挠度的计算方法,并分别对两种加固梁进行有限元模拟。将模拟值、计算值与试验值进行对比,三种值得对比误差在6%左右,说明有限元可以较好的模拟加固梁的挠度变化。

8 beams were tested.The CFRP-PCPs was embedded in the bottom and side of the beam.In order to study the effects of vari-ous factors on the deflection of beams, PCPs materials, block length and prestress were not identical.According to the test results, the loaddisplacement curves were plotted and analyzed.On the basis of experimental study, propose calculation method of deflection of the beam.Two kinds of reinforcement beams are calculated by finite element method.The calculated value and the experimental value value werecompared with the simulation.The three kinds of comparison errors are about 6% .The finite element method can simulate the deflectionchange of the strengthened beams.