There are three beam-column connection methods for space frame structure factory buildings: vertical plane, horizontal plane and inclined plane splicing. When using inclined splicing, it should be noted that the acute angle formed between the outer flange of the beam column and the splicing plate will reduce the installation space of the first row of high-strength bolts, and the hole position should be adjusted according to the lofting. So what are the requirements for the column foot connection of the steel space frame workshop?

Strict constraints are made on the flanges of beams and columns to directly open holes and bolt small components to prevent the cross-section of the space frame members from being weakened. Changing the connection method is an effective way to solve the problem.

Of the anchor bolt embedded in the concrete foundation shall be calculated according to the provisions of the building foundation planning standard GB50007. Do not confuse this embedded length with the anchorage length in concrete standards, they are two concepts. When the anchor bolt is provided with an end anchor plate, the outer contour of the anchor plate may exceed the scope of the bottom plate of the steel space frame.

In order to facilitate the positioning and accurate calibration of steel space frame structure columns, adjusting nuts can be provided for the anchor bolts at the four corners of the bottom plate and the length of the threaded buckle can be extended accordingly. The grouting layer should use special grouting materials, and should not be replaced by fine stone concrete or high-grade mortar.

The shear key can be made of angle steel, channel steel, I-beam and other steel, and its setting direction should make the strong axis perpendicular to the direction of shear force. The length of the shear key is 100~150mm to ensure that it extends into the shear groove at the top of the concrete column.

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