Steel structure bolt connection is a commonly used connection method in steel structure engineering, mainly including the following types:
1. Ordinary bolt connection: This is the most common bolt connection method. After the bolt is installed, the force of tightening the nut mainly comes from the worker's force, and the transmitted force is relatively small. This connection method is mainly used for structural parts with low stress or small changes in stress, such as temporary works and auxiliary structures.
2. High strength bolt friction type connection: High strength bolts are pre tightened with a wrench or electric tool to generate a large pre tightening force on the bolt, clamping the connecting plate so that it only generates frictional force under the applied force. This connection method is mainly used for structural parts with high stress and frequent changes in stress.
3. High strength bolt compression type connection: Unlike friction type connection, compression type connection mainly relies on the shear of bolts and the pressure of connecting plates to transmit force. In this connection method, there should be no impurities such as grease and paint on the contact surface between the bolt and the connecting plate.
4. Anchor bolt connection: mainly used to fix steel structures on concrete foundations. Anchor bolts are pre-set during the pouring of concrete foundations, and then the steel structural components are connected to the concrete foundation through anchor bolts.
The above are the common ways of bolted connection in steel structures. Different connection methods are suitable for different engineering scenarios and need to be selected according to actual needs.
When selecting and applying steel structure bolt connection methods, the following factors also need to be considered:
1. Structural requirements: Different structural requirements may require different types of bolt connections. For example, for structural parts that are subjected to large loads or frequent load changes, high-strength bolt connections may need to be selected. For some temporary projects or auxiliary structures, ordinary bolt connections may be sufficient.
2. Installation conditions: Installation conditions can also affect the selection of bolt connection methods. For example, in places with limited space or equipment, it may be necessary to choose manually installed ordinary bolts. When conditions permit, the use of high-strength bolts can provide better connection performance.
3. Cost considerations: High strength bolts and anchor bolts are usually more expensive than ordinary bolts. In the case of limited budget, it may be necessary to balance cost and performance and choose the most suitable bolt connection method.
4. Maintenance considerations: Different bolt connection methods may have different maintenance difficulties and frequencies. For example, high-strength bolted connections may require regular inspection and re tightening, while ordinary bolted connections may require less maintenance.
In general, the selection of steel structure bolt connection methods needs to consider factors such as structural requirements, installation conditions, costs, and maintenance. At the same time, it is necessary to comply with relevant design specifications and safety regulations to ensure the safety and reliability of the connection.
