An evaluation method for fatigue performance of steel pipe welded intersecting joints

A technology of intersecting joints and fatigue performance, which is applied in the field of steel pipe welding, can solve the problems of fatigue performance, change, and inability to fully grasp the fatigue performance of steel pipe welding intersecting joints, and achieve the effect of eliminating defects and ensuring fatigue performance
CN106735997BActive Publication Date: 2019-02-22FUZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FUZHOU UNIV
Publication Date
2019-02-22

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Abstract

The invention relates to an evaluation method for fatigue performance of a steel pipe welding intersecting joint. The area of the contact face of a welding line in the steel pipe welding intersecting joint and a main pipe and the area of the contact face of the welding line in the steel pipe welding intersecting joint and a branch pipe are adopted as evaluation indexes of the fatigue performance of the steel pipe welding intersecting joint; and the area of the contact face of the welding line in the steel pipe welding intersecting joint and the main pipe and the area of the contact face of the welding line in the steel pipe welding intersecting joint and the branch pipe are calculated and compared, and the small value is taken for evaluating the fatigue performance of the steel pipe welding intersecting joint. According to the evaluation method, all current evaluation indexes for the fatigue performance of the steel pipe welding intersecting joint can be comprehensively taken into consideration, and the fatigue performance of the steel pipe welding intersecting joint is evaluated more reasonably.
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Description

technical field

[0001] The invention relates to the field of steel pipe welding, in particular to a method for evaluating the fatigue performance of welded intersecting joints of steel pipes. Background technique

[0002] Steel pipe welding intersecting joints have the characteristics of clear force transmission, good mechanical performance, strong bearing capacity, light and beautiful building appearance, and are widely used in bridges, buildings and other fields. However, with the increase of the service life of steel pipe welded intersecting joints, especially in the environment of long-term repeated live load, the fatigue problem of steel pipe welded intersecting joints is prominent. Concrete-filled steel tube truss arch bridges—Yajisha Bridge and Shitanxi Bridge were opened to traffic for 10 years and 16 years respectively, and fatigue cracking of steel tube welded joints appeared.

[0003] The current evaluation indicators for the fatigue performance of welded interse...

Claims

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