by 1.
Building system 1-1, portal frame system 1-1-1, and basic component diagram 1-1-2 illustrate the mechanical principle.
The portal frame structure is mainly a transverse rigid frame composed of columns and beams, and the rigid frame is a plane stress system.
In order to ensure longitudinal stability, support between columns and roof support are set.
The columns and beams of rigid frame are made of section H-shaped steel, and various loads are transmitted to the foundation through the columns and beams.
Support and tie bar rigid support are made of hot-rolled section steel, generally angle steel.
The flexible support is round steel.
The tie bar is a compression round steel pipe, which forms a closed system with the support.
Roof purlins and wall beams are generally C-shaped steel and Z-shaped steel.
Bear the force transmitted from the roof panel and wall panel, and transfer the force to the column and beam.
1-1-3.
Basic form of portal frame a.
Typical portal frame b.
Portal frame with crane c.
Portal frame with local second floor 1-1-4.
Basic nodes a.
Column foot nodes b.
Beam and column nodes ■ Local second floor nodes refer to multi-storey frame system.
1-1-5.
Derivative form of rigid frame ■ Cranes and local second floors can be arranged in the derived form of rigid frame.
■ Gable rigid frame is also a multi-span rigid frame in nature, but the specific section between the middle column and the rigid frame column is rotated by 90 degrees.
1-2.
Multi-storey frame system 1-2-1, frame diagram 1-2-2, description of mechanical model a.
Pure rigid frame: rigid frame in both vertical and horizontal directions.
B.
Rigid-jointed – braced frame: rigid-jointed horizontally, articulated longitudinally, and braced longitudinally to transmit horizontal force.
C.
Braced frame: both vertical and horizontal directions are hinged, and supports are set in both directions to transmit horizontal force.
D.
Sometimes in order to ensure sufficient rigidity, supports are also set in rigid frame.
Frame column The frame column can adopt H-shaped section, box-shaped section, cross-shaped section, tubular section, etc.
All superstructure forces are transmitted to the foundation through frame columns.
The frame beam generally adopts H-shaped section.
The force on the floor and roof is transferred to the frame column through the frame beam.
The support is generally made of hot-rolled section steel, and its function is to transfer the horizontal force between floors and ensure the rigidity of the structure.
1-2-3.
Basic node a.
Column base node ■ Column base node is the same as portal frame system.
B.
Column and beam node 2, support, tie rod 2-1, flexible support between columns in the figure, rigid support between columns 2-2, description ■ support is divided into flexible support and rigid support.
The flexible support is made of round steel and must be tensioned during installation.
It is mainly used for portal frame structure.
The rigid support is made of section steel and is used in structures with high rigidity requirements such as multi-storey frame, lower section support of crane beam, etc.
■ Ties and supports work together to form a closed stress system.
Under the condition that the support end has rigid members and transmits pressure, no tie bar is required.
■ Roof horizontal support is the same as that between columns.
■ According to the needs, there are also herringbone, splay, K, V, gate, L, Y, single diagonal bar and other forms of support.
3.
Corner brace 3-1, Figure 3-2, Description ■ The setting of the corner brace is the out-of-plane calculated length of the compression flange of the beam or column.
The corner brace can be made of angle steel or pressed by flat steel.
■ In the multi-storey frame system, horizontal corner brace is often set at the position where the beam and column are rigidly connected.
4.
Crane beam 4-1, side span structure of crane beam shown in the figure, middle span structure of crane beam, standard crane beam Figure 4-2, description ■ The crane beam is a load-bearing member of crane load, which is welded and formed by steel plate.
■ Refer to the side span structure for the treatment of deformation joint position.
■ When the crane tonnage is large, brake truss or brake beam shall be set to resist transverse horizontal load.
5.
The profiled steel plate for the canopy is HV-197TD-788 plate and HV-205TD-820 plate.
6.
Purlin, wall beam 6-1, C-shaped cold-formed thin-walled steel 6-1-1, section characteristics of steel 6-1-2, installation node figure 6-2, Z-shaped cold-formed thin-walled steel 6-2-1, section characteristics of steel 6-2-2, installation node figure 7, roof and wall profiled steel sheet 7-1, HV-203KL-406 plate 7-1-1, plate type figure 7-1-2, connection node figure 7-2, HV-380SF-7607-2-1, plate type figure 7-2-2, connection node figure 7-3, HV-475SF-475 plate 7-3-1, plate type figure 7-3-2, connection node figure 7-4 HV-197TD-788 plate 7-4-1, plate type figure 7-4-2, connection node description: ■ waterproof cavity can prevent water seepage caused by capillary phenomenon.
■ This plate type can be used for roof and wall panels, and it is connected with roof purlins or wall beams with self-tapping screws.
■ When used as a roof panel, the screw is fixed with the roof purlin through the wave crest; When used as a wall panel, the screw is fixed with the wall beam at the straight section of the wave trough near the wave crest.
7-5.
HV-205TD-820 plate 7-5-1, plate type diagram 7-5-2, connection node diagram description: ■ waterproof cavity can prevent water seepage caused by capillary phenomenon.
■ This plate type can be used for roof and wall panels, and it is connected with roof purlins or wall beams with self-tapping screws.
■ When used as a roof panel, the screw is fixed with the roof purlin through the wave crest; When used as a wall panel, the screw is fixed with the wall beam at the straight section of the wave trough near the wave crest.
7-6.
HV-225TD-900 plate 7-6-1, plate type diagram 7-6-2, connection node diagram description: ■ waterproof cavity can prevent water seepage caused by capillary phenomenon.
■ This plate type is used for wall panels, which are connected with roof purlins or wall beams with self-tapping screws; The screw is fixed with the wall beam at the straight section of the wave trough near the wave crest.
7-7.
HV-360YC-360 plate 7-7-1, plate type drawing 7-7-2, connection node drawing description: ■ self-tapping screw directly connects with wall beam through the plate.
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