Damage location system and method for periodic inspection of suspension bridges and arch bridges
A damage location and suspension bridge technology, applied in bridges, bridge maintenance, bridge reinforcement, etc., can solve problems such as dependence on the accuracy of the numerical model of the structure, affecting the reliability of the damage location results of the hanger, and large noise interference.
Active Publication Date: 2016-06-15
DALIAN UNIV OF TECH
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[0004] The development of damage detection systems for suspenders in structures such as suspension bridges and arch bridges is of great significance; however, the damage detection of suspenders based on vibration information in long-span bridge structures such as suspension bridges and arch bridges still faces the problem of large noise interference and the accuracy of structural numerical models. These two challenges directly affect the reliability of the suspender damage location results
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[0055] Taking the detection of the suspender of the suspension bridge as an example, the numerical model of the cross-sea bridge is selected as the research object to carry out the research on the damage location of the suspender. The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings:
[0056] 1) Finite element model
[0057] There are 30 suspenders on both sides of the bridge (15 upstream and downstream of each side span), and 78 suspenders in the main span (39 upstream and downstream). Based on ANSYS software to establish its finite element model such as Figure 4 As shown, the main tower and double-layer truss deck system are built with beam4 three-dimensional beam elements, and the main cables and suspenders are established with link10 elements.
[0058] 2) Measuring point layout and obtaining vibration response
[0059] Such as Figure 5 , select the right half of the main span of the cross-sea b...
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The invention discloses a damage locating system for use in periodic detection of suspension bridge and arch bridge suspenders and two damage locating methods used thereby, and belongs to the technical field of damage detection for engineering structures. The system is characterized by comprising an exciting module, a data collection module, a data analysis module, and a decision module. The two damage locating methods of suspenders are key techniques. The system and the methods are applicable to damage locating and safety assessment for suspension bridge and arch bridge suspenders and have the advantages that cost is low, operation is facilitated, labor is saved, noise resistance is high and structured numerical models are not required.
Description
technical field [0001] The invention belongs to the technical field of vibration-based structural damage detection, and relates to the damage location of suspenders in structures such as suspension bridges and arch bridges. Specifically, a damage location system and method for the periodic detection of suspenders are invented. Background technique [0002] Vibration-based structural damage detection technology finds, locates, and even quantifies damage by analyzing the vibration response signal measured by the sensor installed on the structure with an algorithm, which has the advantages of rapid detection and labor saving; it has received widespread attention and great progress has been made, [0003] Suspension bridges and arch bridges are the two main types of long-span bridges in civil engineering structures. Both types of structures require huge investment, and are key components of the entire road network system, often the only way to pass in a small area; therefore, I...
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IPC IPC(8): E01D22/00
Inventor 安永辉欧进萍
Owner DALIAN UNIV OF TECH