单索-叠合板预应力组合网架静力特性分析

构建一种新型预应力组合网架结构,采用预应力索代替长向下弦,混凝土叠合板代替上弦,形成下弦长向为索,上弦为整体现浇混凝土板的预应力组合网架结构。利用有限元软件ANSYS对该结构进行静力特性分析,结果表明节点竖向位移值越靠近结构中心位置越大;叠合板、腹杆出现拉压应力;下弦杆与索均为拉应力,且越靠近中心位置值越大。该结构位移值及应力值均满足规范设计要求。

Static analysis of pre-stressing combined nets with single contains cables and reiteration plate

A new type of pre-stress combinatorial frame structure was presented in this paper.It made use of concrete composite board as the upper cord and the prestressed cable as the bottom chords.The detailed static analysis of the structure was made by the finite element analysis software of ANSYS.Research results showed that the closer the node vertical displacement to the center of the structure,the bigger the value was.Both the tensile stress and compressive stress appeared in composite board and web while the tensile stress in the cable and the bottom chords.The closer the rigging and pole for the bottom chords with the tensile stress to the center,the bigger the value was.Both the displacement and extreme stress of the structure were higher than the requirement of the design and the regulation.