预应力钢-混凝土组合双向楼板空间受力的非线性有限元分析

预应力钢 -混凝土组合梁具有刚度大、承载力高、延性好等特点 ,因而得到越来越广泛的应用。如将组合梁在平面交叉组成双向楼板体系 ,预期可以进一步提高其刚度和承载力。为此 ,利用非线性有限元方法 ,对预应力钢 -混凝土组合单向楼板和双向楼板进行了空间受力全过程分析 ,并通过改变预应力筋配置进行了参数讨论。分析结果表明 ,相对于钢 -混凝土组合单向楼板 ,组合双向楼板的承载力可以提高 133% ,刚度可以提高 6 6 %。而施加预应力后 ,刚度和承载力还可以继续提高。钢 -混凝土组合双向楼板是一种非常有前途的结构形式

SPATIAL ANALYSIS OF PRESTRESSED STEEL-CONCRETE COMPOSITE TWO-WAY SLAB WITH NONLINEAR FINITE ELEMENT METHOD

Prestressed steel\|concrete composite beams have the advantages of large stiffness,high strength and good ductility.And the stiffness and strength of slab can be improved much more if letting the composite beams cross each other to buildup two\|way slab.The composite beams are placed under the concrete in one\|way or two\|way respectively to compare the difference.The place of installing the prestressed cables is also discussed in this paper.The numerical results show that the strength of two\|way composite slab can be improved by 133%,while the stiffness can be improved by 66%,which are compared with the one\|way slabs.And the strength and stiffness can be improved further if the prestressed cables are installed.It shows that the two\|way composite slab is a new structure with a bright future.