Seismic construction method of intercolumn support of steel structure workshop

Category： Industry News

Time：2020-07-06

Seismic construction method of intercolumn support of steel structure workshop

One. The inter-column support should meet the following 5 requirements:

1) When there is a crane, the upper and lower column supports are set in the middle of the steel structure workshop unit, and the upper column support is added at both ends of the steel structure workshop unit; When the seismic fortification intensity is 7 degrees, the length of the structural unit is greater than 120m, when the seismic fortification intensity is 8 degrees and 9 degrees, the length of the steel structure workshop unit is greater than 90m, and two columns are supported by the upper and lower columns at 1/3 of the middle of the unit;

2) The length and slenderness ratio between columns, the angle between the oblique rod and the horizontal plane, and the thickness of the gusset plate at the intersection of the support are as follows:

(1) The length and slenderness ratio of the cross support between columns, the angle between the oblique support and the horizontal plane, and the thickness of the gusset plate at the support intersection should not exceed the provisions of Table 10-13;

(2) The angle between the diagonal brace and the horizontal plane is not more than 55°;

(3) The thickness of the support intersection gusset plate is not less than 10mm.

3) The position and construction method of the connection between the lower column support and the column foot should ensure that the seismic effect is directly transmitted to the column foot, that is, the intersection point of the support should be located at the bottom of the column foot or column foot; When 6 and 7 degrees cannot be directly transmitted to the foundation, the adverse effect of the support on the column and foundation should be considered:

4) The bottom top of the lower intercolumn support is connected with the concrete bottom, and there is no concrete tie beam.

5) All data should be selected for the support member between columns. When the length standard of the data is exceeded, butt welds and other strength joints can be selected. The connection between the column and the member shall not be less than 1.2 times the plastic bearing capacity of the supporting member.

Keywords： Seismic construction method of intercolumn support of steel structure workshop

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