In the last issue, we introduced why we need to make a membrane structure carport. I believe everyone has already understood it. We all know that the membrane structure carport is generally a combination of steel structure shelves and membrane cloth tensioning. Today, the editor of Shanghai Shows A Membrane Structure Co., Ltd. talked about the reinforcement of the steel structure skeleton in the membrane structure carport.
The method of strengthening the steel structure skeleton of the membrane structure carport, including changing the structural calculation pattern, reducing the load, preventing crack propagation, increasing the cross-section and connection strength of the original structural members, etc., we will explain one by one.
Changing the calculation graphics of the steel structure skeleton structure of the carport: The method of strengthening the structural calculation graphics by changing the structure refers to changing the load distribution status, force transmission path, node properties and boundary conditions, adding additional members and supports, applying prestressing forces, and considering space collaborative work Measures to strengthen the structure.
General reinforcement method of structural calculation graphics for membrane structure carport steel structure skeleton change:
1. The structure can be reinforced by the following methods to increase the stiffness of the structure or component
(1) Add support to increase the stiffness of the structure, or adjust the natural frequency of the structure, etc. to improve the structural bearing capacity and improve the dynamic characteristics of the structure;
(2) Add support to form a spatial structure and check and calculate according to the spatial structure;
(3) In the frame structure, focus on strengthening the stiffness of one column so that it can withstand most horizontal forces to reduce the load of other columns;
(4) adding support or auxiliary rods to reduce the slenderness ratio of the structure to improve its stability;
(5) Set up tie rods or moderately tensioned cables in structures such as towers to strengthen the stiffness of the structure.
2. The bending members can be reinforced by the following methods to change the internal force of the section
(1) change the load distribution;
(2) change the end support;
(3) change the structure to a pole structure;
(4) Adjust the position of the support of the continuous structure;
(5) Add an intermediate support or connect the ends of the simply supported structure into a connection structure;
(6) Apply pre-stress.
3. The truss can be reinforced by the following methods to change the internal force of its members
(1) Adding pre-stressed tie rods;
(2) Add brace to change the truss to a brace structure.
In addition to the method of changing the calculation figure of the steel structure skeleton structure of the carport, the method of strengthening the steel structure skeleton of the membrane structure carport has the following methods:
(1) Connection of reinforcement and reinforcement:
The connection method of steel structures, that is, the selection of welding seams, rivets, ordinary bolts and high-strength bolt connection methods, should be determined according to the reason, purpose, force condition, structure and construction conditions of the structure's need for reinforcement, and consider the original connection method of the structure .
Welding joints and friction-type high-strength bolts are generally suitable for steel structure reinforcement. When there is a basis, a hybrid connection of welds and friction-type high-strength bolts can also be used. When welding joints are used, approved welding processes and joining materials shall be used.
(2) Strengthen the reinforcement of the section of the component:
When using an enlarged section to strengthen steel members, the selected section form should be conducive to the requirements of the reinforcement technology and take into account the existing defects and damage.
(3) Repair and reinforcement of cracks:
Membrane structure carport steel structure skeleton structure due to repeated load and material selection, construction, manufacturing, construction and installation improper expansion and brittle fracture tends to crack damage, we should try to repair. Before repairing, it is necessary to analyze the causes of cracks and the severity of their effects, and take targeted measures to improve the actual work of the structure or install and strengthen the membrane structure carport. Components that are not suitable for repair and reinforcement shall be removed and replaced.
Original finishing from Shanghai Shows A Membrane Structure Co., Ltd.
Reprint please specify
沪公网安备 31011802003675号