Maintenance Management Research of a Large-span Continuous Rigid Frame Bridge Based on Reliability Assessment by Using Strain Monitored Data

Li, Ying hua; Peng, Kesheng; He, Jianming; Shuai, Qiangjun; Zou, Gang

doi:10.30564/jaeser.v4i2.3128

Cited by 3 publications

(3 citation statements)

References 21 publications

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“…In the paper, the data acquired from the sensors named 2-3MID-1, 2-3MID-2, 5-6MID-2, 4Z9h-1 and 4G1h-1 are taken as samples to display the profile of the monitoring data, and the selected time period is from March 2006 to April 2010. The pre-processed method of transforming the initial data into strain data is elaborated in detail in the papers [22,23] . Figure 4 shows the outline of the strain data after several pre-processed steps.…”

Section: The Monitoring Data Processingmentioning

confidence: 99%

Fatigue Safety Assessment of Concrete Continuous Rigid Frame Bridge Based on Rain Flow Counting Method and Health Monitoring Data

Li,

He,

Zeng

et al. 2023

j. of archit. environ. & struct. eng. res.

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The fatigue of concrete structures will gradually appear after being subjected to alternating loads for a long time, and the accidents caused by fatigue failure of bridge structures also appear from time to time. Aiming at the problem of degradation of long-span continuous rigid frame bridges due to fatigue and environmental effects, this paper suggests a method to analyze the fatigue degradation mechanism of this type of bridge, which combines long-term in-site monitoring data collected by the health monitoring system (HMS) and fatigue theory. In the paper, the authors mainly carry out the research work in the following aspects: First of all, a long-span continuous rigid frame bridge installed with HMS is used as an example, and a large amount of health monitoring data have been acquired, which can provide efficient information for fatigue in terms of equivalent stress range and cumulative number of stress cycles; next, for calculating the cumulative fatigue damage of the bridge structure, fatigue stress spectrum got by rain flow counting method, S-N curves and damage criteria are used for fatigue damage analysis. Moreover, it was considered a linear accumulation damage through the Palmgren-Miner rule for the counting of stress cycles. The health monitoring data are adopted to obtain fatigue stress data and the rain flow counting method is used to count the amplitude varying fatigue stress. The proposed fatigue reliability approach in the paper can estimate the fatigue damage degree and its evolution law of bridge structures well, and also can help bridge engineers do the assessment of future service duration.

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Section: The Monitoring Data Processingmentioning

confidence: 99%

Fatigue Safety Assessment of Concrete Continuous Rigid Frame Bridge Based on Rain Flow Counting Method and Health Monitoring Data

Li,

He,

Zeng

et al. 2023

j. of archit. environ. & struct. eng. res.

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“…As for the prestress loss and concrete shrinkage and creep etc., the load effects σ S distribution gradually close to concrete tensile strength distribution with time, therefore, we calculate the initial quasi dynamic reliability q β by using the quasi dynamic tensile strength distribution as the the resistance σ R . The method of quasi dynamic load effects σ S transferred from the monitored data and initial quasi dynamic reliability q β calculation step both can be seen in the papers [18,19] . Figure 5 illustrates the quasi dynamic load effects σ S distribution.…”

Section: The Calculation Of the Initial Quasi Dynamic Reliability Q βmentioning

confidence: 99%

Dynamic Reliability Assessment of Heavy Vehicle Crossing a Prototype Bridge Deck by Using Simulation Technology and Health Monitoring Data

Li¹,

Zeng³

et al. 2022

j. of archit. environ. & struct. eng. res.

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Overloads of vehicle may cause damage to bridge structures, and how to assess the safety influence of heavy vehicles crossing the prototype bridge is one of the challenges. In this report, using a large amount of monitored data collected from the structural health monitoring system (SHMS) in service of the prototype bridge, of which the bridge type is large-span continuous rigid frame bridge, and adopting FEM simulation technique, we suggested a dynamic reliability assessment method in the report to assess the safety impact of heavy vehicles on the prototype bridge during operation. In the first place, by using the health monitored strain data, of which the selected monitored data time range is before the opening of traffic, the quasi dynamic reliability around the embedded sensor with no traffic load effects is obtained; then, with FEM technology, the FEM simulation model of one main span of the prototype bridge is built by using ANSYS software and then the dynamic reliability when the heavy vehicles crossing the prototype bridge corresponding to the middle-span web plate is comprehensively analyzed and discussed. At last, assuming that the main beam stress state change is in the stage of approximately linear elasticity under heavy vehicle loads impact, the authors got the impact level of heavy vehicles effects on the dynamic reliability of the prototype bridge. Based on a large number of field measured data, the dynamic reliability value calculated by our proposed methodology is more accurate. The method suggested in the paper can do good for not only the traffic management but also the damage analysis of bridges.

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“…Gao 29 studied the probability model of the extreme effect of traffic load during service period based on the health monitoring data of bridge structure. In order to evaluate the reliability of continuous rigid frame bridge, Li 30 found that the probability density function of stress effect of concrete bridge followed normal distribution.…”

Section: Introductionmentioning

confidence: 99%

Static effect of assembled beam bridge under statistical and stable traffic flow load

Yao

Dan

Zhao

et al. 2022

Journal of Low Frequency Noise, Vibration and Active Control

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The live load effect of bridge structure caused by traffic flow load is the largest in the sum of all live load effects. Study on the strain and deflection of the assembled beam bridge under the statistical stable traffic flow load can reveal the static effect and dynamic response law of the structure, and then evaluate the service performance of the structure. In this paper, the advanced bridge structure health monitoring technology is used to collect and analyze the traffic flow load parameters. First, according to the probability distribution function of each parameter in the traffic flow load model, the statistical stable traffic flow load is synthesized and the simplified bridge mechanical model is applied. Second, the variance and relative entropy are used to judge the statistical stability of the expectation, variance and probability density function of the static effect. Finally, the evolution law of the expectation, variance and probability density function of the static effect at different locations on the prefabricated beams of the whole bridge deck is analyzed when the static effect reaches the state of statistical stability.

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Maintenance Management Research of a Large-span Continuous Rigid Frame Bridge Based on Reliability Assessment by Using Strain Monitored Data

Cited by 3 publications

References 21 publications

Fatigue Safety Assessment of Concrete Continuous Rigid Frame Bridge Based on Rain Flow Counting Method and Health Monitoring Data

Fatigue Safety Assessment of Concrete Continuous Rigid Frame Bridge Based on Rain Flow Counting Method and Health Monitoring Data

Dynamic Reliability Assessment of Heavy Vehicle Crossing a Prototype Bridge Deck by Using Simulation Technology and Health Monitoring Data

Static effect of assembled beam bridge under statistical and stable traffic flow load

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