Metal structure assembly:

Metal structure assembly:
Metal structure integration includes integration in the workplace and in the environment. Bonding methods include welding and bolting. We should use to assemble the steel structure based on verifying the strength of the parts.

1. The metal structure includes a uniform cross-section
Steel structure splicing at factory
Compression-bearing components: straight butt welding (figure a) or splicing plate plus fillet welding (figure b) can be used. When burning straight buttocks, the welding quality must meet the Class I or II quality standards; if not, binding plates and fillet welds should be used.

Compression-bearing components: straight butt welding (figure a) or splicing plate plus fillet welding (figure b) can be used.

When using splicing plates and fillet welds, component flanges and webs should have their own connecting plates and welds to make the transfer of energy as straight and uniform as possible to avoid the concentration of excess stress. When determining the width of the web splicing plate, it is necessary to leave enough space to use the welding rod when welding the longitudinal weld.
The metal structure links to the site
Compression-bearing components: connecting plates can add high bolts (Figure c) or endplates to add high bolts (Figure d).

Pressure-bearing components: Welding (pictures e, f) or upper and lower contact surfaces can be flat and carry direct transfer force (images g, h). When welding, the upper part of the part should be installed in the factory in advance. The lower part (or two upper and lower parts) has placement parts (station metal or angle metal) to ensure proper positioning when heating. When the upper and lower contact areas are arranged downwards and fitted upwards, they should be added with a small number of welds and bolts where they directly carry pressure and transfer force so that they cannot move. The combination of pressure and pressure components should be calculated according to the principle of equal power; that is, connecting materials and connectors can transmit high internal strength to the broken phase.

2. Connecting to steel beams
Joint beams are divided by industry and spatial integration due to different construction conditions.

Steel structure splicing at factory
1) It is best to move the flange and web positions to avoid the focus of welds.
2) Welding joints of flanges and webs usually take the butt weld.
3) Examination and calculation are not required for sheets that meet Class I and II heating quality testing standards.
4) Testing and calculation are required for heats that meet the Class III temperature testing standard. If the welding capacity is insufficient, oblique welds may be used. If θ satisfies tgθ≤1.5, check and count is not required.

The metal structure links to the site

1) By linking to the site, usually, the flange and the web should be cut in the same section to make it easier to navigate in sections (Figure a). To make the flange plate have a certain amount of room for expansion and contraction during the welding process to reduce the remaining heat stress, about 500mm length can be stored in the industry without welding.
2) As shown in Figure b, flange positions and web splicing ‘correct positions can prevent welds from focusing on the same section, but are not easy to move.

3) With riveted beams and large welded beams that are very important or subject to flexible loads, high-strength bolts are often used for assembly on site.

3. The connection of the first and second beams
The second beam is freely supported
1). Scattering
Structure: The supporting beams should be set in parallel areas of the main beam to avoid excessive pressure on the main beam web.

Features: Simple structure, easy installation of second beams, but primary and secondary boam systems take up a large net space.

Calculation: Generally, no calculation is required, and bolts are used for adjustment only.

2). Private communication
Structure: The second beam is connected to the side of the main beam and can be directly connected to the main metal seal (Figure a, b) or a short angle bracket.
The second beam continues
The free beam based is intertwined, except that the second beam passes continuously and is not broken at the main beam. When the second beam needs to be separated, the assembly area can be set with a minimum bending time. Use bolts or welding to adjust between the base and second beams.

1). Scattering
The free beam based is intertwined, except that the second beam passes continuously and is not broken at the main beam. When the second beam needs to be separated, the assembly area can be set with a minimum bending time. Use bolts or welding to adjust between the base and second beams.

2). Private Communication:
Structure: To ensure continuity of the second span line twice in the main hole, connecting plates should be provided on the upper and lower floors.
4. Beam connection with column
To connect nodes, the following basic principles must be followed:
It is safe and reliable. Power analysis should be as close as possible to real operating conditions. Calculation diagrams corresponding to or close to the actual connection of the components must be accepted; the connection must have a clear power transmission line and a reliable structural guarantee.

Easy to make, move, and install. Reduce the type of members; leave the area of ​​†‹вЂ‹ integration size adjustment; try to simplify operation during construction, such as avoiding overheating of site welds, setting and installing foundations, etc.

The economy is rational. The most economical method is determined after careful consideration of building materials, manufacturing, construction, etc., and should not be construed as a storage device.

The beam column connection can be divided into three types: flexible connection (hinged connection), solid connection, and solid connection according to various rotation strengths.