Basic design principles of seismic space frame

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 What are the basic design principles of seismic space frame structure?In general,it should be allowed to calculate the horizontal earthquake action in the two main axis directions of the building structure, and carry out the seismic check.The horizontal seismic action in each direction should be borne by the lateral force resisting members in that direction.For structures with obliquely crossed lateral force-resistant members, when the angle of intersection is greater than 15°, the horizontal seismic action in the direction of each lateral force-resistant member shall be calculated separately.

For space frame structures with significantly asymmetrical mass and stiffness, the torsional effect under the action of a two-way horizontal earthquake should be included. In other cases, the method of adjusting the seismic effect should be allowed to be included in the torsional impact. For large-span and long cantilever structures in the seismic fortification of eight or nine degrees, the vertical seismic action should be calculated.

The support conditions of the space frame structure can be assumed to be hinged supports or elastic supports that can be moved laterally in two directions, laterally in one direction, and without lateral displacement according to the stiffness of the support structure and the structure of the support nodes.

The space frame is widely applicable, so we should add more knowledge to increase our understanding of the space frame.



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