Damage assessment method of grid structure based on static load test
A grid structure and static load test technology, applied in the direction of instruments, geometric CAD, design optimization/simulation, etc., can solve the problems that limit the large-scale application of damage assessment methods based on static load tests, and achieve the goal of saving experimental costs and time Effect
Active Publication Date: 2021-05-04
NINGBO UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
The existing damage assessment methods based on static load tests all need to know the size of the static load, and have strict requirements on the location and direction of the loading point, which greatly limits the large-scale promotion of damage assessment methods based on static load tests. application
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[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0023] The embodiment of the invention discloses a static load test-based damage assessment method for grid structures.
[0024] for figure 1 For the grid structure shown, the steps of using the present invention to identify structural damage are as follows:
[0025] (1) First, number all the members of the grid structure, and number the degrees of freedom of all end nodes of the members at the same time, such as figure 1 As shown in , list the relationship ...
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The invention discloses a grid structure damage assessment method based on a static load test, and relates to the technical field of structure damage assessment. The invention does not need to know the magnitude of the static load, and has no limitation on the loading position and direction, and the damage assessment can be performed only by measuring the displacement data of each node. The method of the present invention first numbers all the degrees of freedom of all bars of the grid structure and all end nodes of the bars, and establishes a finite element model of the grid structure to obtain a stiffness matrix; performs a single-point loading test, calculates the damage vector, and The damage location and severity were assessed based on the damage vector. Using the grid structure damage assessment method based on the static load test disclosed by the present invention avoids the defect that the existing method needs to measure the load size and has strict requirements on the loading position and direction, and can save experiment cost and time.
Description
technical field [0001] The invention belongs to the technical field of structural damage assessment, and in particular relates to a grid structure damage assessment method based on a static load test. Background technique [0002] The grid structure is widely used in long-span roofs, offshore platforms, steel bridges, and tower crane systems. Due to the influence of unfavorable factors such as fatigue accumulation of metal materials, environmental corrosion, weld expansion, and loose joints, the structure inevitably Damage will occur, and serious damage will lead to major safety accidents such as structural collapse. Therefore, whether there is damage to the grid structure, the location and severity of the damage must be evaluated in a timely manner, and then corresponding maintenance and reinforcement measures can be taken. Among the various damage assessment methods that have been proposed, the damage assessment method based on the displacement data obtained from the stru...
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IPC IPC(8): G06F30/17G06F30/23G06F119/14
CPCG06F30/17G06F30/23G06F2119/14
Inventor 朋茜赵卓杨秋伟吕忠达
Owner NINGBO UNIVERSITY OF TECHNOLOGY