楼板配筋率对板筋参与梁端抗弯的影响

Effects of Slab Reinforcement Ratio to Participation of Monolithic Slab in Actual Flexural Capacity of Beam End

针对现浇楼板在框架梁端实际抗弯中具有参与作用的情况,采用有限元软件ABAQUS对不同楼板配筋率的钢筋混凝土框架结构在侧向荷载作用下的受力情况进行了分析.研究表明,现浇楼板配筋率会影响现浇楼板中的板筋在框架梁端实际抗弯的参与程度,在梁柱同等配筋的情况下,楼板配筋率高的框架梁端的实际承载能力要大于楼板配筋率低的结构的实际承载能力,因此,在进行有效翼缘宽度的选取时,应将现浇楼板配筋率列入考虑范围.

Because cast-in-place floor affects the actual resistance to bending of frame at end of beam, the finite element software ABAQUS was used to analyze the stress condition of reinforcement concrete frame with different slab reinforcement ratio subjected to lateral loading. The results indicated that the slab reinforcement ratio of cast-in-place floor affects the effects of the plate steel in cast-in-place floor on the actual resistance to bending of frame at end of beam ; under same reinforcement of beam column, the actual beating capacity of beam end with high slab reinforcement ratio is larger than that with the lower one. Therefore, when choosing taking the slab reinforcement ratio of cast-in-place floor on the actual into account is the effective necessary. flange