The seismic performance of the steel structure workshop is relatively good, which is mainly due to its lightweight and high strength. However, if the design is not reasonable or flawed, the steel structure workshop may also be damaged. Therefore, it is necessary to carry out seismic design for steel structure workshop.
When carrying out the seismic design of the steel structure workshop, a number of factors need to be considered, including the highest intensity, geological conditions, the structural form and materials of the building, etc. At the same time, it is necessary to adopt effective seismic design methods to ensure that the structural system and components of the building can withstand the best effects.
In the steel structure workshop, steel roof trusses and steel columns are the main load-bearing components, so special attention needs to be paid to these components. When designing, factors such as strength, stiffness and stability of these components need to be taken into account to ensure that they can withstand the action of the best.
There are three main seismic damage characteristics of steel structures:
1.Node failure: In **, the connecting parts of steel structure joints are susceptible to damage, because these parts are the weakest link in the steel structure. Joint failure can lead to the loss of stability of the entire structure, which in turn can lead to more serious damage.
2.Component failure: beams, columns and other components in the steel structure are susceptible to damage. When these members are subjected to more force than their load-bearing capacity, failures such as bending, shearing or twisting occur.
3.Overall collapse: If the supporting structure or foundation design of the steel structure house is unreasonable, or there are problems with the construction quality, it may lead to the collapse of the entire structure.
In steel structures, the failure of support connections and beam-column connections are two common forms of seismic damage.
The bracing connection is one of the important nodes in the steel structure, and its failure usually occurs at the connection between the bracing rod and the steel column or steel beam. In **, the force on the support connection exceeds its load-bearing capacity, and the destruction occurs. Support buckling occurs when the pressure on the support exceeds its critical buckling force. This failure usually causes the connection between the support rod and the steel column or steel beam to loosen or fall off, and the buckling deformation occurs due to insufficient pressure, which in turn affects the stability of the entire structure.
Local instability of beams and columns: Under the action of **, steel structure beams and columns will be repeatedly subjected to bending moments and shear forces. If the cross-section design of the beam or column is not reasonable or there is a problem with the construction quality, most of the failures of the beam-column connection occur at the lower flange, while the failure of the upper flange is much less. This can be due to two reasons: one is that the floor slab and the beam are deformed together, resulting in an increase in the next-element stress;The second is that the middle section of the lower flange welded at the web position is a significant weld defect. These reasons can cause the lower flange to be susceptible to damage in **.
The overall collapse of the steel structure is the most serious form of failure in the mechanism failure. In **, if the structural design of the steel structure building is unreasonable or there are problems with the construction quality, it may lead to the overall collapse. This form of failure is usually due to the unreasonable design of the foundation of the building or the problem of construction quality, which causes the building to collapse due to the inability to maintain stability in **.
For steel structure greenhouses, although the possibility of overall collapse is small, it is also necessary to pay attention to its design and construction quality. Especially in severe weather conditions such as heavy snow, the steel structure greenhouse may be subjected to additional loads, which may lead to the collapse of the greenhouse if the design is not reasonable or there are problems with the construction quality.
In order to improve the seismic performance of high-rise building steel structures, effective measures need to be taken in design, construction and maintenance. For example, effective seismic design methods need to be adopted in the design to ensure that the structural system and components of the building can withstand the action of the first gradeIn the construction process, it is necessary to carry out the construction in strict accordance with the design requirements to ensure that the quality of the building meets the requirementsIn terms of maintenance and management, regular maintenance and inspection are required to find and deal with existing problems in a timely manner.