Sensitivity analysis based dynamic construction control method for one-time tension of stay cables
A control method and technology of stay cables, which are applied in the fields of instruments, electrical digital data processing, computer-aided design, etc., can solve the problems of inability to control the construction process, low construction efficiency, structural stress damage, etc., and reduce the finite element analysis work. Quantity, simplify construction steps, improve the effect of structural stability
Active Publication Date: 2017-08-08
NO 1 CONSTR ENG CO LTD OF CHINA CONSTR THIRD ENG BUREAU CO LTD +1
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[0003] The cable system of the cable-stayed bridge is a high-order statically indeterminate structure. At present, the construction of this structural system basically adopts the method of gradual approximation for multiple tensions. Not only the construction efficiency is low, but also the construction process cannot be controlled. Cause the structure to be destroyed due to excessive stress in a certain construction stage; at the same time, due to the multiple redistribution of the internal force of the structure during construction, the actual internal force of the structure is no longer a reasonable value of the internal force of the bridge state
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[0045] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0046] It should be noted that, in the description of the present invention, the terms "horizontal", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, or operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be cons...
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The invention discloses a sensitivity analysis based dynamic construction control method for one-time tension of stay cables. The method comprises the following steps: a cable-stayed bridge completion time model is established with finite element software, the model is calculated with a finite element method, and tension import value of each stay cable is obtained; uncontrollable external factors are subjected to sensitivity analysis according to the established cable-stayed bridge completion time model; the sensitivity of each stay cable is determined through analysis according to the established cable-stayed bridge completion time model; multiple tension sequence schemes and corresponding tension force are predetermined according to stay cable sensitivity analysis results, the different tension sequence schemes are calculated with the finite element method, and the optimal tension sequence scheme is selected; construction is performed according to the optimal tension sequence scheme obtained through calculation, the tension force of each stray cable and a result about sensitivity analysis of the uncontrollable external factors. With adoption of the sensitivity analysis based dynamic construction control method for one-time tension of the stay cables, the stay cable construction process is simplified.
Description
technical field [0001] The invention relates to the technical field of building construction, in particular to a dynamic construction control method for one-time tensioning of stay cables based on sensitivity analysis. Background technique [0002] As a cable system, the cable-stayed bridge has a larger spanning capacity than the girder bridge, and is the main type of long-span bridge with wide adaptability. [0003] The cable system of the cable-stayed bridge is a high-order statically indeterminate structure. At present, the construction of this structural system basically adopts the method of gradual approximation for multiple tensions. Not only the construction efficiency is low, but also the construction process cannot be controlled. The structure is destroyed due to excessive stress in a certain construction stage; at the same time, due to the multiple redistribution of the internal force of the structure during construction, the actual internal force of the structure ...
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IPC IPC(8): G06F17/50G06Q50/08
CPCG06F30/13G06F30/23G06F2119/06G06Q50/08
Inventor 郭福元王续胜彭慧肖俊陈和张科龙
Owner NO 1 CONSTR ENG CO LTD OF CHINA CONSTR THIRD ENG BUREAU CO LTD
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