【摘要】 SMPM加固技术即高强钢绞线网片—聚合物砂浆复合面层加固技术是一种新兴的加固技术,本文对3根RC梁进行受弯性能加固试验研究,BF—1为未过火对比梁,BFF—1为过火的对比梁,BFF—2为过火加固梁。通过对试验构件的破坏形态,裂缝分布,荷载-挠度曲线,极限承载力等方面的分析对比,表明普通RC梁在一般过火条件下,其抗弯承载力和刚度有一定程度的降低,而采用SMPM加固后的过火RC梁抗弯承载力和刚度有显著提高,可恢复到其过火前的水平。更多还原

【Abstract】 Rehabilitation with SMPM(high-strength steel wire mesh and polymer mortar) is a new technique of structural strengthening.Experiments were conducted to investigate the flexural behavior of 3 RC beams.BF1 is a comparative beam which is not on fire,BFF-1 is a comparative one fireexposed,and BFF-2 is a strengthened specimen after fire.The mode of failure,cracking behavior,load versus deflection curves and ultimate load-carrying capacity of the strengthened specimens were analyzed.The results showed that the flexural load-carrying capacity and stiffness of the fire-exposed RC beam were reduced,but the ones with rehabilitation were increased effectively.This technique can reach the level of RC beams before fire on load-carrying capacity.更多还原