中文摘要：

分析了复合砂浆钢绞线网加固钢筋混凝土梁的受弯性能,不同材料加固梁的受弯性能可采用同一公式进行计算,研究表明加固梁受弯性能受本体梁的初始受力状态和是否采用三面U型加固影响较大.采用正截面极限平衡法,推导出复合砂浆钢绞线网加固钢筋混凝土梁极限抗弯承载力计算公式;在混凝土结构设计规范公式基础上,提出加固梁裂缝宽度和裂缝间距计算公式,加固梁公式计算值与试验值吻合较好.

英文摘要：

The flexural property of RC beams with high-strength steel wire mesh and polymer mortar overlay is analysed,and a unified formula is proposed for design of strengthened beams made of different materials.It is shown that the ultimate flexural capacity and the crack resistance property of the strengthened beam are greatly influenced by the initial stress state of the original beam and the U-style strengthening.An ultimate flexural capacity calculation formula for the RC beams with high-strength steel wire mesh and polymer mortar overlay is obtained by the limit equilibrium method on the normal section.Based on the concrete structure design codes,modified calculation formulas of crack width and crack space are obtained.The calculation results agree well with the test values.