预应力钢拉杆的理论分析及试验研究

THEORETICAL ANALYSIS AND EXPERIMENTAL INVISTIGATION OF PRESTRESSED STEEL TENSION MEMBERS

在飞机库、桥梁等现代钢结构中经常存在一些承受很大轴向荷载,截面巨大的重型受拉杆件。在这种杆件中引入预应力将会大大节省材料用量和减轻结构自重。然而施加预应力过程中这类拉杆也因受压有可能失去稳定。本文的主要目的就是研究这类预应力拉杆在制造工艺中的稳定性及挠曲形式等问题,并对一组预应力钢拉杆模型进行了破坏性试验。

In the long-span structures(hangar, bridge, etc. ) there are a lot of tension mem-bers, bearing large axial forces and having big cross sections. Application of theprestressing technology to the members of these structures may save much ma-terials and provide lower self-weight, yet the tension members can be buckledby compression in the course of prestressing. Hence, the main purpose of pre-sent paper is to study the stability and deflection forms of the prestressedtension members during fabrication.A series of destructive tests for specimensof tension members has been carried out.