钢网架结构中预应力技术的应用与施工

APPLICATION AND CONSTURCTION OF PRESTRESS TECHNIQUES IN STEEL GRID STRUCTURES

空间钢网架是用于大、中跨度建筑的屋面结构，其特点是受力性能好，整体刚度大，稳定性好，现场施工速度快，经济效益好。目前已在工业与民用建设及公共设施建设中得到广泛应用。在空间钢网架结构中应用预应力技术可以改变网架中部份杆件的受力状态，充分发挥网架结构材料的力学性能，得到明显的经济效益。本文以四川省西昌市铁路分局体育活动中心多次预应力钢网壳工程为例，阐述钢网架结构中预应力技术的应用与施工。

Abstract Spatial steel grid is a type of roof structure used in middle and large-span buiding. It specializes in its excellent mechanical behaviors, stong integral stiffness,good stability, short construction time and good economic benefit. So it was widely used in industrial and civil architectures as well as public buiding. The prestress techniques can be applied in spatial steel grid structures to change the internal force of some bars, and the structural materials can be fully used, which resulted in excellent economic benefit.