Principles to be Followed in Choosing Appropriate Space Frame Engineering Design Form

       There are many different forms for the design of space frame processing engineering, but depending on the environment, the selected form may be different. The following are the basic principles to be followed in the selection of space frame processing engineering:

1. Large-span space frame processing engineering: three-way cross space frame and triangular pyramid space frame are preferred;

2. Plane cross truss system: If the plane shape is square or close to square, it is better to adopt the orthogonal and upright form. When the plane shape is rectangular, the orthogonal and oblique form should be adopted. It is not recommended to adopt the oblique and oblique form.

3. The space frame of the quadrangular pyramid system is evenly loaded and has the best rigidity; the space frame is placed upright to save steel, which is convenient for lighting and ventilation, and the oblique and star shape are conducive to giving full play to the strength of the material.

4. When the planar shape is trigonal, hexagonal or circular, the triangular pyramid system space frame is the first choice. Among them, the triangular pyramid space frame has the highest rigidity, followed by the evacuated triangular pyramid, but it saves materials and has a simple structure, and the honeycomb shape has the worst rigidity. It should be combined with peripheral supports when selecting.

5. Selection of support mode: Peripheral support is suitable for large and mid-span space frames; point support is flexible in layout, suitable for factories and warehouses with large column spacing, and mixed support is suitable for hangars or assembly workshops. The selection of the space frame processing project is not a random choice. It should be considered according to many factors such as the environment and function of the site, so as to ensure that the space frame building can play its due value.

Metal arched roof slot connection method

According to the principle of differential division, a ring can be divided into several small units, and the difference between the width of each unit of each unit and the B2 is ΔB. This difference is processed into a wedge -shaped slot and connects two equal width plates together. This method is called a groove connection method. This method can be used to zero, and it is difficult to turn it. The use of existing ordinary equipment and technology can solve more complicated problems. Not only is it easy and feasible, but also reasonable, improve the utilization rate of materials and reduce waste. The inner arc length is the total length of the division, and the actual external width of the selected board type is divided into unit B2, and the corresponding outer circular unit arc length is B1. Selected wide straight boards, only one-way bending can meet the styling requirements. The difference between the internal and external units is Δb = B1-B2. The gap between the two boards can be suppressed into large, small cover grooves according to the selected plate -shaped ripple forming size. Pull tightly by pulling rivets on the side of the waves, or pull rivets at the valley. This method is applied in the engineering practice in recent years, and has achieved good social and economic benefits. The following is based on two typical projects to explain the choice of different shapes and different board types in detail, and the design and construction methods of the cover slot are also different.

After the above introduction, it can be seen that it can be seen that the groove connection method has great advantages at the hyperbolic level. The SAFS steel structure believes that this practice can be promoted and applied. It is particularly applicable to ordinary mid -range materials such as ordinary pressure steel plates. For high -end materials such as aluminum plates or aluminum alloy plates, direct forming method can also be used. The cost of such engineering is generally relatively high, the strength of the board is low, and it is easy to mold.

Main Factors of Steel Structure Damage and Its Reinforcing Technical Measures

 The main factors of steel structure damage are:

(1) Insufficient bearing capacity of the structure caused by load changes, extended service, and changes in codes and regulations;

(2) The component is deformed, twisted, disabled, dented, etc. due to various accidents, resulting in weakening of the section of the component, warping of the rod, cracking of the connection, etc.;

(3) Deformation, cracking and warping of components or connections caused by temperature difference;

(4) The cross-section of steel structural members is weakened due to corrosion caused by chemical corrosion and electrochemical corrosion;

(5) Others include mistakes in design, production, and construction, and illegal use and operation during the service period.

There are mainly three types of reinforcement technical measures for steel structures:

(1) Cross-section reinforcement method: Reinforce with steel in part or along the whole length of the member, and connect them into a whole to make them bear common force;

(2) Change the calculation diagram: add additional supports, adjust the load distribution, reduce the level of internal force, and force the displacement of the statically indeterminate structural supports to reduce the stress peak;

(3) Prestressed cable method: use high-strength cables to reinforce weak links of the structure or improve the overall bearing capacity, stiffness and stability of the structure.