既有现浇钢筋砼结构中梁抗弯承载能力鉴定的探讨

Discussion on the Appraisal for Bending Carrying Capacity of Beam in Existing cast in suit RC Buildings

区别于新建建筑,既有现浇钢筋砼结构构件的截面尺寸、砼强度、配筋等均已事实存在,且梁与板整体浇筑,梁构件应按双筋T形或倒L形截面梁考虑。根据这一实际受力与构造状况,本文给出了一般情况下的梁截面抗弯承载力设计值计算公式,并提出了梁实际砼强度偏低,或者梁支座截面抗弯承载力不足时的考虑方法,供同行业人员参考。

Different from newly--built buildings, the section dimension, intension of concrete and configuration of reinforcement steel are definite. And as the beam is cast holistic with the slab, the beam member should be calculated in two--male steel reinforced T shape or converse L shape. Based on the actual force and configuration condition, the formula for the design value of the bending capacity of beam section in normal condition is given in this paper. The calculating method in situation that actual intensity of beam is low or that the bending capacity of the beam support section is not enough are suggested in this paper for craft＇s reference.