Bridge crack safety evaluation method and device based on BIM
A bridge and safety technology, applied in the field of bridge crack safety assessment based on BIM, can solve problems such as inconsistent assessment standards and inaccurate assessment results, and achieve the effect of reducing human and financial damage
Pending Publication Date: 2022-04-29
福州市公路事业发展中心
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[0004] In order to solve the problems in the prior art that the safety assessment of bridge cracks relies on manual assessment, resulting in inaccurate assessment results and inconsistent assessment standards, this application discloses a BIM-based bridge crack safety assessment method and device
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[0064] In order to solve the problems in the prior art that the safety assessment of bridge cracks relies on manual assessment, resulting in inaccurate assessment results and inconsistent assessment standards, this application discloses a BIM-based bridge crack safety assessment method and device.
[0065] The first embodiment of the present application discloses a BIM-based bridge crack safety assessment method, see figure 1 The flow diagram shown includes:
[0066] Step 101, for the target bridge, obtain the structural information and crack information of the target bridge, and build a BIM model.
[0067] Step 102, according to the BIM model, obtain the reference finite element model of the bridge and the finite element model of the bridge damage. Since each crack was directly "dug out" in the BIM model according to its shape, length, width, depth and other information, the geometric entity was actually modified, so the conversion to the finite element model is also the geo...
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The invention discloses a BIM-based bridge crack safety evaluation method and device, and the method comprises the steps: constructing a BIM model for a target bridge; the method comprises the following steps: acquiring a bridge reference model and a bridge damage model, performing modal analysis and static analysis, acquiring fundamental frequencies of the bridge reference model and the bridge damage model, and acquiring maximum deflection of the bridge reference model and the bridge damage model under the same load; obtaining the maximum deflection allowed by the bridge damage model under the same load; acquiring a deflection verification coefficient, an overall rigidity verification coefficient and a critical overall rigidity verification coefficient; obtaining a health state evaluation score of the target bridge; obtaining a health assessment grade of the target bridge; acquiring a crack safety state of the target bridge; the evaluation of the safety state of the bridge crack is standardized and visualized, so that the bridge can be overhauled and maintained in time.
Description
technical field [0001] This application relates to the technical field of bridge crack safety assessment, in particular to a BIM-based bridge crack safety assessment method and device. Background technique [0002] Cracks are the most common diseases in concrete bridge structures. The appearance of cracks involves damage to the appearance of the structure, corrosion of the stressed steel bars and loss of structural functions. The impact of cracks on bridge performance is multifaceted. One is the impact on the performance of the bridge. Cracks reduce the stiffness of the bridge, which in turn affects its normal use. Serious cracking problems lead to a decrease in the bearing capacity of the bridge and affect the safety performance of the bridge. Directly reduce the durability and service life of the bridge. [0003] Traditional bridge crack detection methods basically rely on manual inspections and artificial judgment of diseases, and use traditional detection instruments, s...
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IPC IPC(8): G06F30/13G06F30/23G06F119/14
CPCG06F30/13G06F30/23G06F2119/14
Inventor 张培旭李跃穗应旭永孙震陈雯周倩
Owner 福州市公路事业发展中心