Design method of composite steel pipe
A technology of composite steel pipe and design method, applied in the direction of instrument, geometric CAD, electrical digital data processing, etc., can solve the problem of lack of relatively mature design method, and achieve the effect of avoiding unfavorable cracking
Active Publication Date: 2022-04-29
NINGXIA QINGLONG PIPES IND
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Problems solved by technology
[0003] The purpose of the present invention is to provide a design method for composite steel pipes to solve the problem to a certain extent that there is no relatively mature design method in the prior art for water pipes that deal with load pressure by increasing the allowable strain.
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Embodiment 1
[0059] see figure 1 As shown, the design method of the composite steel pipe provided in this embodiment is used to design, calculate and check the composite steel pipe. The prestressed reinforcement layer 2 is hooped on the outer surface of the steel pipe 3 to form a prestressed steel cylinder, so that the prestressed steel cylinder has a certain precompression stress, so as to achieve the purpose of bearing the total external load of the composite steel pipe in advance. The materials of the inner lining layer 5 and the protective layer 4 are ductile mixed materials, and the inner lining layer 5 and the protective layer 4 are lined on the inner surface and outer surface of the prestressed steel cylinder respectively, so that the prestressed steel cylinder and the inner surface respectively The liner 5 and the protective layer 4 are tightly combined and can undergo a certain degree of simultaneous deformation. On the one hand, the hierarchical structure can be tightly structure...
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The invention relates to the technical field of conveying pipeline equipment, in particular to a design method of a composite steel pipe. The design method of the composite steel pipe provided by the present invention comprises the following steps: determine the working pressure and the instantaneous pressure, and calculate the steel structure area A of the prestressed steel cylinder P ; Select the steel bar diameter and steel bar spacing, and set the steel structure area A P Assigned as reinforcement area A s and steel cylinder reinforcement area A y ;Calculate the precompression stress;Calculate the anti-cracking stress P K , to verify whether the anti-cracking stress is greater than the compressive stress P under normal operation w ; Determine the total external load Wall according to the external load; calculate the allowable load Wult of the composite steel pipe, and verify whether the total external load exceeds the allowable load Wult. The design method of the composite steel pipe can reliably and reasonably calculate unknown parameters related to the structure of the composite steel pipe, so that the composite steel pipe can meet the target performance requirements.
Description
technical field [0001] The invention relates to the technical field of conveying pipeline equipment, in particular to a design method of a composite steel pipe. Background technique [0002] In the related art, the prestressed steel cylinder concrete pipe is usually formed by building high-strength rigid concrete inside, outside or inside and outside the steel cylinder. For this kind of rigid prestressed steel cylinder concrete pipe, some available design methods have been proposed, but for some steel pipes that deal with the load pressure by increasing the allowable strain, there is still no relatively mature design method. Contents of the invention [0003] The purpose of the present invention is to provide a design method for composite steel pipes to solve the problem that there is no relatively mature design method in the prior art for water pipes that respond to load pressure by increasing the allowable strain. [0004] In order to achieve the above object, the prese...
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IPC IPC(8): G06F30/17G06F119/14
CPCG06F30/17G06F2119/14
Inventor 张宪伟高文博刘莉安江波
Owner NINGXIA QINGLONG PIPES IND