【摘要】 本文对采用增加截面高度和增加受拉区钢筋面积方法加固的梁的受弯性能进行了分析,并对该梁的裂缝阶段短期刚度进行了初步的研究.根据对该种加固梁进行的基本计算假定,对其各种影响因素进行简化处理,并运用梁截面的物理关系、几何关系和平衡关系,结合现行的规范,提出了相应的短期刚度计算公式.该公式类似于普通混凝土构件的短期刚度计算公式,对实际工程中该类型加固梁的研究有一定的参考意义.更多还原

【Abstract】 In this paper,the flexural behavior of RC beams strengthened by increasing the sectional height and the number of reinforcement is analysed.Based on the premise of this kind of strengthened beam and the predigestion of all infection factors,a formula is given through the relation of physics,geometry and balance on the section of the strengthened beam and the reference of the actual code.It is similar to the formula of the general concrete beam and helpful for the research on the strengthened beam in practice.更多还原