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实用新型
CN200952201Y 体内预应力空间管桁架四点支承大跨度扁网壳屋盖 失效 - 权利终止

体内预应力空间管桁架四点支承大跨度扁网壳屋盖
摘要：
本实用新型公开了一种体内预应力空间管桁架四点支承大跨度扁网壳屋盖，它包括双曲扁网壳壳体(1)、边桁架(2)和支承柱(8)，在边桁架(2)的倒四角锥斜腹杆(3)上固定有竖杆(4)，在竖杆(4)的自由端端部装有定滑轮(5)，在定滑轮(5)中穿有预应力钢索(6)，预应力钢索(6)的两端分别固定在边桁架(2)的支座节点上；本实用新型可大幅减小边桁架的下弦管径，并改善双曲扁网壳的受力，提高结构整体刚度，节约用钢量。
摘要（英）：

The utility model discloses a in-body prestress space pipe truss four points supported large span flat network casing roof which includes a hyperbolic flat network casing (1), an edge truss (2), supporting columns (8), a vertical rod (4) fixed on the reverse quarter-conoid inclined central rod (3) of the edge truss (2), a fixed pulley (5) mounted at the free end of the vertical rod (4), and a prestress steel rope (6) passing around the fixed pulley (5). Two ends of the prestress steel rope (6) are fixed on support base nodes of the edge truss (2). The utility model can greatly reduce the low boom pipe diameter of the edge truss and improve stress of the hyperbolic flat network casing, thus improving the whole structure rigidity and reducing consumption of steel.

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