钢绞线网-聚合砂浆加固钢筋混凝土T梁试验研究与有限元分析

Experimental investigation and finite element simulation about RC T-beams strengthened with wire cable mesh and polymer mortar

对采用钢绞线网-聚合砂浆加固的钢筋混凝土T梁进行了正截面抗弯承载力性能试验研究,并应用ANSYS有限元程序分析混凝土强度等级、钢铰线加固用量等因素对T梁极限承载力的影响,探讨了加固钢筋混凝土T梁的破坏机理、受力特点以及影响因素.研究结果表明,采用该加固措施能够明显改善混凝土T梁在正常使用阶段的受力性能;随着混凝土强度等级、钢绞线加固用量的增加,构件的极限承载力提高、延性增加、抗震能力提高.在此基础上,提出了采用该工艺加固的钢筋混凝土T梁极限承载力计算公式.

The experiments on the flexural behavior of reinforce concrete T-beams strengthened with wire cable mesh and polymer mortar are performed. Several parameters, including the amount of strengthening wire cables and the concrete strength, are simulated with the ANSYS finite element program. The load-deformation process, flexural failure characteristics and the effect of various parameters on their behavior are all discussed. The test results show that the rehabilitation greatly improved the flexural behavior of reinforce concrete T-beams at serviceability limit states. With the increase of the concrete strength and the amount of strengthening wire cables, the ultimate load-carrying capacity of specimen is increased, the ductility and the seismic bearing capability are improved also. Based on the results of finite element analysis and test, the theoretical formulae of the ultimate load-carrying capacity are proposed.