Shield tunnel steel structure pipe segment is made by assembling and welding components together.

At the design procedure of tubular structure, the designers often pay attention to safety analysis of structural members, but ignore the loading capacity of tubular joints.

Connecting with the application of tubular structure in practical project, this paper introduces its features, and expounds the design and construction points of tubular structure.

In order to investigate eliminating effects of residual stresses due to hot dip galvanizing,welding residual stresses of 3 kinds of classic welded connections in tubular structures were comparatively measured by blind-hole method,3 evaluating indicators were introduced,and reasons for residual stresses variation due to hot dip galvanizing were an.

Based on the project of large adverticement arch steel lubular structure in Xiaoshan Beishan Tonglan,Zhejiang,this paper introduces engineering survey,the present situation,the purpose of the static load test of steel tubular structure,load condition and the scheme of non-destructive testing and carries on the actual experiment.

The authors introduce the steel tubular structure,the classification of tubular joints,the development of researching tubular joints in our country and abroad,the experiment and analysis research in Tongji University recently.

With the continuous development of steel industry in China,and application of several technologies such as rolling,cold molding, hot molding and welding,the use of steel tubular structures has been broadened from simple plane structures to spatial structures.

Based on systematic load-bearing tests of steel tube non-stiffened flanges, the deformation and load-bearing pattern are analyzed, and the relation of flange load-carrying capacity to the flange thickness, distance between bolts and edge of flanges, spacing of bolts and eccentricity are also studied.

Flanges are common in steel tube structures.