When it comes to just joining and articling, friends familiar with the construction engineering industry are more familiar with it. So what is the difference between a rigid joint and an articulated joint? What should I pay attention to when making an articulation? Let’s have a look!
The difference between rigid and hinged:
1, the difference in principle
In actual engineering, when a certain stiffness is reached, it is identified as rigid joint in engineering. However, if it can bear the bending moment, but the deformation is large, it is identified as semi-rigid and elastic fixed. The articulation cannot bear the bending moment, but it can be freely rotated and can only resist shear force and axial force.
2, the difference in structure
If the steel structure is just connected, the upper and lower flange and web need to be connected with the structure, and the connection surface is larger. Usually a lap method is used to configure a piece of steel bar for better stability. And articulated as long as the web is connected to the structure. No large contact surface with the steel plate. Because the steel plate contact is too large, the hinged material is easy to rotate, which will cause poor durability and stiffness.
3. Different transfer objects
The rigid joint will transfer the bending moment and shear force through the steel bar, and the bending moment can be well connected with the steel plate to prevent the damage of the steel plate and increase the safety. Articulation can only transfer shear force, not bending moment. The main force is in the center of the hinge, so that the two ends of the pressure, to the partial pressure effect.
4. Different theories
Rigid joint means that the node does not rotate at all, but can bear the shear force, the node stiffness is sufficient, and the articulated joint is free to rotate. Unable to bear the bending moment. For example, I-shaped members, the wings are bent and the web is cut.
What to pay attention to when making a hinge:
1, articulated construction, due to the use of more materials, when purchasing, pay attention to the brand of materials, to ensure the quality of the product, it is recommended to buy to the regular building materials market, if the purchase is large, you can contact the manufacturer to buy, more preferential.
2, in the articulation, to fix each component, but can not be stuck too dead, otherwise it can not freely rotate. In addition, if you can not operate friends suggest to find professional help.
