The location of steel sleeve connection joints

1. The joint is located in the position where the tensile steel stress is small. When the joint is set to a high stress position, the percentage of Class III joints in the same connection section cannot be big than 25%. The percentage of Class II seams should not be big than 50%, and the percentage of Class I seams should not be limited.

2. The node avoids the seismic fortification requirements of the frame beam end and the column end stirrup densification area. When it is unavoidable, the percentage of Class II joints or Class I joints should not over 50%.

3. For parts with low tensile strength or longitudinal compression, the percentage of joints is not limited.

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