高强钢绞线网聚合物砂浆加固钢筋混凝土板抗弯试验研究

通过4块钢筋混凝土板采用高强钢绞线网聚合物砂浆加固前后的对比试验,分析不同损伤程度的钢筋混凝土板加固前后的刚度、开裂及裂缝分布、极限承载力等性能.结果表明:加固后板的开裂荷载、抗弯刚度和极限承载力都有明显提高;提出的简化计算方法能够比较准确地预测板的极限荷载和挠度,可用于钢筋混凝土板的加固设计.

Experimental study on the bending behavior of reinforced concrete slabs strengthened by using high - strength steel- wire mesh and polymer morter

Total 4 reinforced concrete slabs were tested before and after strengthening, by using high-strength steel wire net and polymer morter. The basic behavior, including the bending stiffness, cracking and crack distribution, and ultimate load-carrying capacity were analyzed under different damage extent. It is demonstrated that, after the strengthening by using high-strength steel wire net and polymer morter, the cracking load, bending stiffness, and the ultimate load-carrying capacity of strengthened slabs were improved obviously. The proposed calculation model can predict the uitimate strength and deflection of the strengthed slabs accurately, and the model can be used to design the practical engineering.