关键词: 大跨度结构, 拱式转换结构, 钢管混凝土, 拱, 力学性能

Abstract:

A new type of transfer structure long-span arch-transfer structure is presented.This structure consists of a concrete-filled steel tubular arch,several steel hanger rods and steel beams,and is characterized by having ex-cellent mechanical properties,making full use of the strength of materials and meeting the requirements of architec-tural functions.On the basis of the experiments of two specimens with an arch.transfer structure,the mechanical
properties of the structure are then analyzed.It is found that the arch-transfer structure can be applied to the crea-tion of extremely long span an d big space owning to its excellent mechanical properties in load-carrying and stifness.As far as the mechanical characteristics of the component members of the structure are concemed,the arch is an axial compression&bending member whose whole section is subjected to compression stresses.the floor beams are axial tension&bending members subjected to both the horizontal force balancing the thrust force of arch and the floor loads.and the hanger rods are also axial tension&bending members subjected to the axial tension force in-creasing from the bottom to the top.

Key words: long-span structure, arch-transfer structure, concrete-filled steel tubular , arch, mechanical property