What are the connection forms of steel structures? What are the characteristics of each?

The connection methods of steel structure include welding, ordinary bolt connection, high-strength bolt connection and riveting.

According to the connection part of the welded joint, the melting welding joint can be divided into: butt joint and corner joint.

I-shaped and cross joints, lap joints and plug weld joints, etc.

Shape defects: including undercuts, welds, collapses, root shrinkage, misalignment, angular deviations, weld overheight, tables.

surface irregularities, etc.

Hole-making can be done by drilling, punching, milling, reaming, hitting and punching, etc., for large diameter or elongated holes.

It is also possible to use gas cutting holes. It is strictly forbidden to cut and ream.

Drilling and punching are one-time holes (among them, the thickness of the punched plate should not be greater than.

Milling, reaming, boring and.

The German hole method is secondary hole making, that is, the secondary processing of the hole is carried out on the basis of the primary hole making. The method of gas cutting hole is adopted, and the diameter is generally in the actual processing.

The above round holes, when the drilling can not be realized, the gas cutting holes can be used; Also for long.

Round holes or special-shaped holes can generally be drilled first, and then the method of gas cutting holes can be used. For the use of punching holes, steel.

The thickness of the plate should be controlled.

Within 12mm.

The treatment method of the friction surface at the joint of high-strength bolts is usually sandblasting (pill.

Law. Pickling method, grinding wheel grinding.

method and wire brush manual rust removal method, etc. The treatment process can be selected according to the requirements of the design anti-slip coefficient, and the anti-slip coefficient is required.

Meet the design requirements.

The steel structure connection methods include welding, riveting and bolting.

Riveting is becoming less and less commonly used.

Welding is not suitable for structures that bear dynamic loads, and the construction is also troublesome, and it is not easy to ensure the quality of on-site construction.

Bolting fee steel (bolts).Troublesome surface treatment. However, the bolting site construction is simple and easy to operate.

Computationally speaking, it is divided into hinged and rigid jointing; The hinge can not bear the bending moment, the rigid connection bears the bending moment, the articulated connection is generally bolted, the rigid connection is generally used in combination with bolt connection and welding, and there are also all welded or fully articulated.

1.Welded connections.

Welding is the heat generated by the arc to partially melt the electrode and weldment, and after cooling, condense into a weld, so as to connect the weldment into a whole. The advantages of the utility model are that: the component of any form can be directly connected, the cross-section of the component does not need to be weakened, the material is economical, the structure is simple, the manufacturing and processing is convenient, the connection rigidity is high, the sealing performance is good, the automatic operation can be realized, and the production efficiency is high.

The disadvantage is that the high welding temperature forms a heat-affected zone in the steel near the weld, resulting in local embrittlement of the material. During the welding process, the specimen material is subjected to uneven high temperature and cooling, which leads to the residual stress and deformation of the structure, which has a certain impact on the bearing capacity, stiffness and performance of the structure.

In addition, due to the high stiffness of welded steel structures, once local cracks appear, it is easy to spread to the whole, especially at low temperatures. In addition, the poor plasticity and toughness of the weld may lead to defects during sandblasting, thereby reducing fatigue strength.

2. Willow nail connection.

Rivet connection refers to inserting a rivet with a prefabricated nail head at one end into the nail hole of the connected member, and pressing the other end into the closed nail head with a riveting gun or riveting machine, so that the connector is clamped by the rivet to form a firm connection. Rivet connections have the characteristics of reliable force transmission, good plasticity and toughness, easy quality inspection and assurance, and can be used for heavy-duty structures that bear dynamic loads. However, its structure is complex, steel and labor are expensive, the working conditions are poor, the cost is high, and it is rarely used at present.

3.Bolted connections.

Bolted joints can be divided into ordinary bolted joints and high-strength bolted joints. The advantages of bolt connection are: simple construction technology, easy installation, especially suitable for on-site installation and connection.

In addition, the bolted joints need to be punched in the sheets, increasing the working space.

1. Weld connection.

The weld connection in the steel structure mainly adopts arc welding (that is, at the junction of the components, the high temperature generated by the arc melts the metal of the welding rod or wire at the weld position to connect the components together).

2. Ordinary bolt connection.

Connectors for common bolted connections include bolt rods, nuts, and washers. Ordinary bolts are made of ordinary carbon structural steel or low-alloy structural steel; There are two types: rough bolts and refined bolts.

3. High-strength bolt connection.

High-strength bolted joints also consist of bolt rods, nuts and washers. It is made of steel with high strength (such as 20 manganese titanium boron, 40 boron, 45 steel) after heat treatment. High-strength bolt connection uses a special wrench to tighten the high-strength bolt and apply a specified pretension force to it.

4. Rivet connection.

Rivets are made of rivet steel with good top forging performance. The construction procedure of rivet connection is to first make a hole larger than the nail diameter on the member to be connected. Then the rivet with a semicircular nail head at one end is heated to cherry red, stuffed into the hole, and then riveted with a rivet gun or riveting machine to make the rivet fill the nail hole and beat into another rivet head.

Features of the steel structure

1. The material has high strength and light weight.

Steel has high strength and high modulus of elasticity. Compared with concrete and wood, the ratio of its density to yield strength is relatively low, so the component section of the steel structure is small under the same stress conditions, the self-weight is light, it is convenient for transportation and installation, and it is suitable for the structure with large span, high height and heavy load.

2. The toughness and plasticity of the steel are good, the material is uniform, and the structural reliability is high.

It is suitable for bearing impact and dynamic loads, and has good seismic performance. The internal structure of the steel is uniform, which is close to the isotropic homogeneous body. The actual working performance of the steel structure is more in line with the calculation theory. Therefore, the steel structure has high reliability.

3. The degree of mechanization of steel structure manufacturing and installation is high.

The steel structure components are easy to manufacture in the factory and assemble on the construction site. The mechanized manufacturing of steel structure components in the factory has high precision, high production efficiency, fast assembly speed and short construction period. Steel structure is one of the most industrialized structures.

4. The sealing performance of the steel structure is good.

Because the welded structure can be completely sealed, it can be made into high-pressure vessels, large oil pools, pressure pipelines, etc., which have good air tightness and water tightness.

The above content refers to Encyclopedia - Steel Structure.

Encyclopedia - steel structure connection.

There are three types of connection methods for steel structures: weld connection, bolt connection and rivet connection.

1. Weld connection.

The weld connection is to melt the electrode and the weldment locally by the heat generated by the arc, and then condense into a weld after cooling, so as to connect the weldment into one.

2. Bolt connection.

Bolt connection is a fastener that connects the connectors as a whole. Bolt connection is divided into ordinary bolt connection and high-strength bolt.

Connect both. Advantages: The construction process is simple, the installation is convenient, especially suitable for the installation and connection of the construction site, and it is also easy to disassemble, and it is suitable for the need to assemble and disassemble the structure and temporary connection.

3. Rivet connection.

Rivet connection is a rivet with a semi-circular prefabricated nail head at one end, after the nail rod is burned red.

Quickly insert the nail hole in the connector, and then use a rivet gun to rivet the other end into a nail head to make the connection tight.

(1) Welding

1. Commonly used welding methods for steel structures in construction projects: according to the degree of automation of welding, it is generally divided into three types: manual welding, semi-automatic welding and automatic welding.

2. According to the connection part of the welded joint, the melting welding joint can be divided into: butt joint, corner joint, T-shaped and cross joint, lap joint and plug welding joint, etc.

3. When welding, the welding method, conditions, sequence and preheating and other process measures should be reasonably selected to control the welding stress and welding deformation as much as possible. If necessary, reasonable measures should be taken to eliminate the residual stress and deformation of welding.

(2) Bolt connection

The connecting bolts used in the steel structure are generally divided into two types: ordinary bolts and high-strength bolts.

1) Ordinary bolts:

1. Commonly used ordinary bolts include hexagonal bolts, stud bolts and anchor bolts;

2. Hole-making can be used by drilling, punching, milling, dumpling hole, sex hole and hole, etc., and gas cutting can also be used for larger diameter or elongated holes. Drilling and punching are one-time holes in which the thickness of the punched plate should not be greater than 12mm).

The connector is accepted at the site.

High-strength large hexagonal head bolt connection pair for steel structure connection, torsional shear high-strength bolt connection pair, high-strength bolt connection pair for steel grid frame, ordinary bolts, rivets, self-tapping nails, rivets, nails, anchor bolts (mechanical and chemical reagent type), anchor anchors and other fastening standard parts and nuts, washers and other standard accessories, their variety, specifications, performance, etc. should meet the current national product standards and design requirements.

The high-strength large hexagon head bolting pair and the torsion-shear high-strength bolting connection pair should be accompanied by the inspection report of torque coefficient and fastening axial force (pretension) respectively with the box when leaving the factory.

Content from user: lili

First, the connection method of the steel structure 1, welding connection 2, bolt connection 3, rivet connection.

Second, the structure mainly made of steel is one of the main types of building structures. Steel is characterized by high strength, light weight and high stiffness, so it is particularly suitable for building large-span and ultra-high and super-heavy buildings; The material has good homogeneity and isotropy, which is an ideal elastomer, which is most in line with the basic assumptions of general engineering mechanics. The material has good plasticity and toughness, can have large deformation, and can bear the dynamic load well; short construction period; It has a high degree of industrialization and can carry out specialized production with a high degree of mechanization; The processing accuracy is high, the efficiency is high, and the airtightness is good, so it can be used to build gas tanks, oil tanks and transformers. Its disadvantage is poor fire resistance and corrosion resistance.

It is mainly used for load-bearing skeletons in heavy-duty workshops, plant structures under dynamic loads, plate and shell structures, towering TV towers and mast structures, large-span structures such as bridges and warehouses, high-rise and super high-rise buildings, etc. In the future, high-strength steel should be studied for steel structure to greatly improve its yield point strength; In addition, new varieties of steel should be rolled, such as H-shaped steel (also known as wide flange steel) and T-shaped steel and profiled steel plates, etc., to meet the needs of large-span structures and super high-rise buildings. The steel structure is divided into light steel and heavy steel.

There is no unified standard for judgment, and many experienced designers or project managers often cannot fully explain it, but can be judged by considering and judging with some data.

3. The steel structure is mainly made of steel, which is one of the main types of building structures. Steel is characterized by high strength, light weight and high stiffness, so it is particularly suitable for building large-span and ultra-high and super-heavy buildings; The material has good homogeneity and isotropy, which is an ideal elastomer, which is most in line with the basic assumptions of general engineering mechanics. The material has good plasticity and toughness, can have large deformation, and can bear the dynamic load well; short construction period; its industry.

The commonly used connection methods for steel structures are: weld connection, bolt connection, and riveting.

Weld connection: it is a rigid connection (can withstand bending moment), in addition to the structure that directly bears the dynamic load, the weld connection can be used in the ultra-low temperature state.

Bolt connection: it is a hinged (zero bending moment) can be used under normal circumstances, which is characterized by fast on-site operation, easy to dismantle and easy to maintain.

Riveting: Used when the structure is under less force.

Steel structure: It is a structure mainly composed of steel materials, and it is one of the main types of building structures. The structure is mainly composed of steel beams, steel columns, steel trusses and other components made of section steel and steel plates, etc., and the components or components are usually connected by welds, bolts or rivets.

Because of its light weight and simple construction, it is widely used in large-scale factories, venues, super high-rise buildings and other fields.

Welded connection, riveted connection, ordinary bolt connection, high-strength bolt connection, nail shooting, self-tapping bolt connection.

There are four kinds of welding, bolts, self-tapping screws and rivets.

There are welding, riveting, bolting, riveting and welding hybrid connections.

Welding, riveting, hybrid connections, bolted connections.

Weld connection, bolt connection, rivet connection.

There are now three ways to connect steel structural components, one is welded connection, one is bolt connection, and one is rivet connection. Nowadays, the most common methods are welded connections and bolted connections. Only when the load-bearing power of the steel structure is conducted, it will be connected with rivets.

Manual arc welding is commonly used in steel structures. The process of using manual operation to melt the electrode and weldment with the heat generated by the welding arc and solidify into a firm joint is manual arc welding.

What are the two commonly used connection methods for steel structural components? Both of these connection methods are more commonly used, but a little dust.

The connection method of steel structure components is commonly used with screws and wells. There is also welding of pendants.

The connection methods of steel structure components are commonly used for bolt connection and welding.

Answer]: weld connection, ordinary bolt connection, rivet connection, high-strength bolt connection.

Weld connection is the most important connection method of steel structure, and its advantages are simple structure, no weakening of component cross-section, saving steel, convenient processing, easy to adopt automatic operation, good sealing of connection, and large stiffness. The disadvantage is that the residual stress and residual deformation of welding have an adverse effect on the structure, and the problem of low temperature cold brittleness of the welded structure is also prominent.

The advantages of ordinary bolt connection are simple construction and easy disassembly and assembly. The disadvantage is that the amount of steel used is large. It is suitable for installation, connection and structure that requires frequent disassembly and assembly.

The advantages of rivet connection are good plasticity and toughness, reliable force transmission, easy to check quality, and it is suitable for the connection of directly bearing dynamic load structure. The disadvantage is that the structure is complex and the amount of steel is large, so it is rarely used at present.

High-strength bolts are characterized by Li point: the installation of Minzhou is fast, the bridge is tightly connected, and it is not easy to loosen. Good mechanical performance and high fatigue resistance. It is convenient for construction and conducive to maintenance.