Specific design method of long-span steel structure workshop

Performance Design of Steel Structure System

Generally speaking, when designing steel structures, designers need to comply with the requirements in the codes for seismic design of buildings. In addition, in the code for seismic design of buildings, there are strict regulations on elongation, yield strength and tensile strength of steel. For example, the elongation of steel is not less than 20%, and the actual measured value of tensile strength and yield strength is not more than 0.85. Designers must comply with these requirements to ensure that the designed long-span steel structure workshop can meet future use requirements.

However, in the norms of the US system, there are some contradictions between the requirements and the Chinese standards. Therefore, for designers, when designing the performance of the steel structure system, it is necessary to pay close attention to the seismic capacity of the building, from which the deformation capacity of the steel structure can be estimated to ensure that the performance design of the steel structure system meets the use requirements. In addition, when designing the performance of the steel structure system, the designer must master the relevant standards or specifications in detail, and accurately calculate the stable bearing capacity of the steel structure, clarify the control indicators of the stable bearing capacity, and ensure that the design of the long-span steel structure meets the use requirements.

Bearing capacity of steel members

At present, in the published and implemented codes for the design of steel structures, it uses empirical guidance to design the local stability of steel structures. For compression and bending components, in order to improve the safety of use, designers can increase the stability factor of the components to achieve this, and at the same time ensure that the design of the bearing capacity of the components meets the future use requirements of long-span steel structure workshop.

Deformation properties of steel members

In the steel structure design specification, it has strict requirements on the deformation performance of steel members, namely:

1. In order to ensure the reliability and safety of the structure and improve the aesthetics of the steel structure, the designer must set corresponding limits for the degree of deformation of the components when designing the steel structure. In addition, if there are special requirements, designers can make targeted adjustments, but the adjustments must not affect the appearance and use of components or structures.

2. When calculating the deformation of components or structures, the designer can ignore the weakening of the section caused by the connection holes of the fasteners.

3. In order to achieve the purpose of improving the use conditions and appearance, the designer can pre-arch the transverse force member according to the actual requirements, usually the deflection value generated by the sum of the dead load standard value and 1/2 live load standard value, At the same time, the limit value of deformation under live load is stipulated.

Performance Design of Steel Joints

When designing the performance of steel joints, designers should focus on the following contents, namely:

1. Based on the design of deformation capacity of steel joints, designers should carefully analyze the relationship between load, strain and displacement. At the same time, the ductility performance of steel joints can be determined through reasonable data analysis. In addition, in the performance design process of steel joints, in order to ensure the design quality, the designer must ensure that the proportional coefficient between the deformation value and the yield deformation value is not less than 1.2, so as to avoid corresponding problems caused by substandard steel quality. It should be noted that in the process of designing the deformation capacity of steel joints, the designer must ensure that the elastic-plastic deformation value is within the range required by the standard, and the deformation value of the bearing capacity must also meet the standard requirements, so as to ensure that the long-span steel structure can always be used. at its best.

2. In the performance design process of steel joints, designers should focus on the design of bearing capacity. Therefore, when carrying out design work, designers need to have a detailed grasp of the analysis method of load and strain relationship, and can use it flexibly, so as to determine the size of the load value more accurately, and ensure that the performance design of steel structure nodes can be carried out in an orderly manner .

With the gradual acceleration of economic development, more and more steel structure workshops have sprung up. In order to ensure the quality of use of steel structure factory building, especially the use quality of large-span steel structure workshop. In addition to striving to improve their overall quality, designers should actually increase their research efforts on performance-based long-span steel structure design. Efforts should be made to improve the design quality of long-span steel structure workshop, ensure that the performance of large-span steel structure workshops can meet the requirements of owners, and ensure that the use of long-span steel structures is always at the best performance. Adding new kinetic energy to further accelerate the development of steel structure factory building plays an important role in comprehensively improving the design level of steel structure workshops in my country.