板筋参与梁端负弯矩承载力问题的探讨  

Discussion on Negative Flexural Strength of Beams Including Slabs

作　　者：吴勇[1] 雷汲川[1] 杨红[1] 白绍良[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045

出　　处：《重庆建筑大学学报》2002年第3期33-37,共5页Journal of Chongqing Jianzhu University

基　　金：国家自然科学基金资助项目 (5 98780 5 6 )

摘　　要：针对板筋参与梁端负弯矩承载力这一问题 ,对比分析了各国规范的不同规定和国内外已有的试验资料。分析结果表明 ,板有效宽度是一种计算折合宽度 ,不是板的实际参与宽度 ,也不是板参与梁抗弯时所能达到的屈服宽度。根据按中国规范设计的典型框架所能达到的最大层间位移角 ,可取梁侧每边六倍板厚范围作为板的有效宽度。在考虑板筋参与梁端负弯矩承载力的同时 ,应注意参与受力板筋的锚固问题和横向钢筋的设置问题 。In this paper, the provisions in different design codes and some tests on the identification of the negative strength of beams including slab-bars are compared and analyzed. The results of analysis demonstrate that the effective width of slabs is a converted width for calculation. It isn't the actual working width of the slab or the yield slab width. According to the maximum storey drift, the frames can reach, an effective width of slabs can be defined as six times the slab-thickness width on each side of the web. Considering the participation of reinforcement in slab into resistance of the beam against negative flexure, the anchorage of tension bars and the transverse reinforcement placement in slab should be taken into account to ensure the effective work of longitudinal slab bars.

关 键 词：板筋 梁端负弯矩承载力 板有效宽度 横梁作用 

分 类 号：TU375.1[建筑科学—结构工程]