It is difficult to self-study steel structure design with zero foundation. It is best to enroll in some training courses. Read more specifications: \x0d\ 1. "Technical Regulations for Welding of Steel Structures in Construction" (JGJ81-2002) \x0d\ 2. "Design, Construction and Acceptance Regulations for High-Strength Bolt Connections of Steel Structures" (JGJ82-91) \x0d\ 3. "Technical Conditions for Manufacturing Boiler Steel Structures" (JB/T1620-93) \x0d\ 4. "General Technical Conditions for Bolted Welded Boiler Steel Structure Manufacturing" \x0d\\x0d\ Things to note when designing steel structures: \x0d\ , clarify the specifications and regulations involved in steel structure design\x0d\ The specifications and regulations involved in steel structure design can generally be divided into three types: 1. National specifications (GB), such as "Steel Structure Design Code" (GB50017-2003) , "Technical Specifications for Cold-Formed Thin-Walled Steel Structures" (GB50018-2002), "Specifications for Seismic Design of Buildings" (GB50011-2010), etc.; 2. Industry regulations (JGJ) or local regulations (DBJ) include: "High-rise Civil Buildings" Technical Regulations for Steel Structures" (JGJ99-98), "Technical Regulations for Space Grid Structures" (JGJ7-2010), etc.; Association regulations (CECS) include: "Technical Regulations for Steel Structures of Portal Frame Lightweight Houses (2012 Edition)" (CECS102:2002), "Technical Regulations for Prestressed Steel Structures" (CECS212:2006), etc. \x0d\ 2. Understand the concepts of steel structure design service life, design reference period and building life \x0d\? The difference between steel structure design service life, design reference period and building life. The so-called design life usually means that within the time specified at the beginning of the design, the product will not have major problems and require large-scale repairs. It only needs daily maintenance to achieve the performance at the beginning of the design. Design concept. The design reference period refers to the time parameters used to determine the representative value of the live load during the design process. Based on a specific area and relationship, statistics are made in different years to determine the failure rate, and finally the benchmark is set. The life span of a building mentioned here refers to the final use time of the building. Generally speaking, this time is the entire time from the beginning of the building until it is completely scrapped and withdraws from the stage of history. Parametric data in these aspects are indispensable in our current steel structure design. \x0d\ 3. Distinguish between the load-bearing capacity limit state and the normal service limit state of steel structure design \x0d\ The load-bearing capacity limit state refers to the structure or structural component reaching the maximum load-bearing capacity or deformation that is not suitable for continued load-bearing. The normal service limit state refers to the structure or structural component reaching a certain specified limit of normal use or durability performance. In the design of steel structures, the limit state of load-bearing capacity is strictly controlled to ensure that the structure will not be safely damaged; the normal use limit state must be effectively controlled in conjunction with the building's safety level, use functions and other requirements. It not only meets the usage requirements of the building, but also takes into account the economy of the building structure. \x0d\ 4. Precautions for the design of single-layer steel structure factory buildings \x0d\ 1. Pay attention to the separation measures for the temperature zones of single-layer factory buildings. With the expansion of the scale of industrial buildings in our country, some extremely large-area factories have been built in recent years, some of which are hundreds of meters long vertically, and some are connected horizontally by more than ten spans. The separation length of temperature zones in the "Steel Structure Design Code" should be in accordance with the relevant requirements of the "Steel Structure Design Code" or the "Technical Regulations for Steel Structures of Portal Frame Lightweight Houses". The separation of longitudinal temperature zones is preferably a double-column expansion joint. For factory buildings with brackets, a structure supported by hinged short steel columns or suspended steel plates can also be used to realize a double-column expansion joint. For example, the use of double-column expansion joints to separate longitudinal temperature zones will affect the functionality of the factory building, so it is better to use sliding bearings. \x0d\ 2. Pay attention to the layout of the single-story factory floor support system. The factory roof support system ensures the stability of the structure during installation and use, improves the overall stiffness of the structure, and controls the out-of-plane calculated length of the roof rods to reduce the cross-sectional size of the rods. The roof support system includes transverse supports, longitudinal supports, vertical supports (for trapezoidal roof trusses only) and ties. \x0d\ 3. Pay attention to the layout of the support system between the columns of the single-story factory building. The inter-column support of the factory building ensures the longitudinal stability and spatial stiffness of the factory building, bears the longitudinal wind load, crane load and seismic force of the factory building and transmits them to the foundation, and controls the out-of-plane calculated length of the column to reduce the cross-sectional size of the column. In addition to meeting the above functions according to the specification requirements, the setting of the inter-column supports must also be coordinated with the roof support system and be located within the same column spacing as the roof supports. For roof support forms, cross-shaped cross supports should be preferred. This support has direct force transmission, simple structure, low material consumption, and high stiffness. For upper column supports where the ratio between column spacing and support height is greater than 2, herringbone or figure-eight supports can be used. type supports to reduce material use; when the support location needs to consider personnel access or placement of equipment, a hollow door-shaped support should be considered. However, this kind of support is expensive in materials and has poor stiffness, so the inter-column supports, especially the lower column supports, should be designed as much as possible. At column distances where there are no personnel or equipment.
\x0d\ 5. Precautions for Steel Structure Drawing \x0d\ The design drawings of steel structures, like many design drawings, are divided into two parts. The design drawings at the beginning of the design and the construction drawings. We strictly follow the relevant design review It is stipulated that the main direction of the designer of the drawings is to conduct in-depth research and exploration on the design drawings, and the relevant construction units of the steel structure design according to the actual engineering direction. During the design process, the designers of these two parts must coordinate their work well, infiltrate their own ideas and concepts, and achieve the same goals to ensure the smooth implementation of the project progress and finally achieve the purpose of the project.