摘要
钢筋混凝土板弯曲具有双向性。设置了4个钢筋混凝土板试件试验,测定相应位置的应变与挠度,结果表明,钢筋混凝土板弯曲确实具有双向性,一个方向弯矩必定会引起另一正交方向的变形,即曲率变化。最后得出结论:套用梁的挠度计算公式计算板的挠度,会产生不小的计算误差;混凝土板弯曲一个方向的弯矩引起正交方向变形的大小与受压混凝土泊松比有关,也与混凝土的强度等级及配筋率等有关,并且进一步指出这一思路还可用来解决混凝土双向板挠度计算。
Reinforced concrete slab has the property of two-way bending.Four test specimens of reinforced concrete slabs were set up to be determined the strain and deflection at corresponding location.The results show that the bending of reinforced concrete slab does have two-way nature and the moment in one direction will cause the deformation of the other orthogonal direction,which can be reflected by the changes of curvature.At last, the conclusion was given the calculation formula, which was derived from deflection calculation of beams and now is applied to the slabs,will result in no small calculation errors.The moment on one direction will cause the deformation of the other orthogonal direction and the size is related to the poisson＇s ratio of the compressed concrete.And the size also is related to the strength grade of concrete and the reinforcement, and so on.And the idea was further pointed out that it also can be used to solve the deflection cal- culation of concrete two-way slab.
出处
《混凝土》
CAS
北大核心
2016年第8期126-129,共4页
Concrete
基金
国家科技支撑项目(2009BAJ28B02-03)
青岛市博士后科研补助经费(01156020407)
关键词
混凝土板
弯曲
挠度
concrete slabs
bending
deflection
