文档介绍：华中科技大学
硕士学位论文
梁板相对刚度对现浇板弯矩的影响研究
姓名:陈东海
申请学位级别:硕士
专业:结构工程
指导教师:郭建华
20061106
摘要
钢筋混凝土现浇梁板体系是目前使用最多、适用范围最广泛的一种楼盖形式,它的安全
性和经济性对建筑物有着很大的影响。整浇楼盖中,梁、板是相互作用的整体,彼此之间密
切联系,共同受力和变形。但在实际工程中,对竖向荷载作用下的整浇混凝土梁板体系楼盖
的设计,采用的是梁、板分离的设计方法。这种设计方法存在较大的误差。竖向荷载作用下
整浇楼盖中力的走向、传递及其变形协调问题较为复杂。
本文运用目前通用的有限元软件ANSYS,对基本计算模型的多组梁板体系楼盖进行了较为
准确的非线性有限元分析,研究了整浇楼盖中梁板相对刚度以及板格长宽比对处于不同位置
的矩形楼板弯矩的影响。系统地分析了竖向荷载作用下现浇楼盖梁、板协同工作性能以及板
中内力的分布规律,并与弹性计算的结果相比较,得出了对按弹性计算的中间板格、边板格
和角板格各个关键点位弯矩的修正系数,运用软件非线性拟合得到了该修正系数关于梁板相
对刚度的计算公式,作了相应的工程实例来验证了其可行性。将按弹性方法计算得出的板各
点弯矩乘以修正系数,即可得到比较准确的计算结果。为完善弹性简化计算方法在板弯矩计
算中的不足之处,进一步提出了调整钢筋布置和用量的有关设计建议,既消除安全隐患,又
节约材料,使得现浇梁板体系楼盖的设计更为安全、合理和经济。

关键词: 梁板体系梁板相对刚度长宽比非线性有限元弯矩分布双向板

I
Abstract
Cast-in-situ RC beam-slab floor system is the one which is the most widely used at present. It
has great effect on the safety and economy. Beams and slabs of cast-in-situ RC floor system are
integrated and act each other. Each of them contacts the others very tightly. They bear the load and are
deformed together. But in the methods of designing the cast-in- situ RC floor system under the gravity
load, beams and slabs are divided practically. The method has some errors. Force distribution and
deformation correspondence of cast-in-situ RC floor system under the gravity load are plex.
In this paper, finite element analysis software ANSYS are used for floor system calculation
model with nonlinear finite elements. This paper mainly study on the influence of beam-to-slab relative
stiffness and length-width ratio of floor on floor moment, and try to find out the cooperating work
performance of beam-slab floor system under the gravity load. Then this paper synthetically analysis
internal force law of cast-in-situ RC frame beam-slab floor system under the gravity load. Compared
with result from the elasticity theory, this paper brings forward floor moment modification coefficients
of mid-panel, side panel and corner panel. Apply the co