Multiple damage detection in complex bridges based on strain energy extracted from single point measurement

Najafabadi, Alireza Arabha; Daneshjoo, F.; Ahmadi, Hamid

doi:10.1007/s11709-020-0624-5

Cited by 10 publications

(5 citation statements)

References 39 publications

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“…Arabha and the Daneshjoo in their research [17] for the first time used modal strain energy (DI) and curvature damage factor (CDF) methods to identify the support damage of arched bridges. The results show that the support damage has caused the appearance of new vibration modes in the examined bridge and the appearance of these modes is a confirmation of the support damage.…”

Section: Modal Strain Energy Methodsmentioning

confidence: 99%

Investigation of Damage Detection in Bridge Piers using modal strain energy and modal flexibility methods: A Case Study

Zamanian

2024

Preprint

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Piers provide vertical support to the bridge deck and transfer loads to the foundation and ground. Ensuring their stability and structural integrity is critical to the overall safety of the bridge. The most common existing methods for damage detection, mainly used in bridge decks due to easier access and simpler modeling, are modal methods. The primary focus of this study is to explore the feasibility of utilizing these methods to detect damage in bridge piers, assuming that accurate mode shapes can be obtained. Therefore, one of the piers of Shahid Bakri Bridge in Tehran was selected as a case study. This pier was accurately modeled in Opensees. For sensitivity measurement, it was divided once into 10 parts and once into 100 parts, according to the number of sensor points. Also, 13 different scenarios with varying degrees of damage in concrete cover, rebar, and concrete core were investigated. In the two stages before and after the damage, mode shapes were extracted, and two methods, modal strain energy and modal flexibility, were used to detect the damage. The results demonstrated the good performance of both methods in detecting the presence of damage. Regarding locating the damage, the modal strain energy method was more successful. However, if there was damage in a small area of the cross-section, finding the exact location required additional sensor placements. These methods did not provide a suitable index to determine the extent of the damage.

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Section: Modal Strain Energy Methodsmentioning

confidence: 99%

Investigation of Damage Detection in Bridge Piers using modal strain energy and modal flexibility methods: A Case Study

Zamanian

2024

Preprint

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“…In any case, there are no uniform standards for evaluating structural performance. You can choose from a variety of performance indices such as stiffness (Chen et al, 2018), compliance (Ranaivomiarana et al, 2019), strain energy (Arabha Najafabadi et al, 2020) and static displacement. Manipulation of the gathered works establishes the objective function.…”

Section: Formulation Of Optimization Problemmentioning

confidence: 99%

“…, 2018), compliance (Ranaivomiarana et al. , 2019), strain energy (Arabha Najafabadi et al. , 2020) and static displacement.…”

Section: Components Of Optimization Phenomenonmentioning

confidence: 99%

A review on developing optimization techniques in civil engineering

Zaheer

Manzoor²,

Ahamad³

2023

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PurposeThe purpose of this article is to analyze the optimization process in depth, elaborating on the components of the entire process and the techniques used. Researchers have been drawn to the expanding trend of optimization since the turn of the century. The rate of research can be used to measure the progress and increase of this optimization procedure. This study is phenomenal to understand the optimization process and different algorithms in addition to their application by keeping in mind the current computational power that has increased the implementation for several engineering applications.Design/methodology/approachTwo-dimensional analysis has been carried out for the optimization process and its approaches to addressing optimization problems, i.e. computational power has increased the implementation. The first section focuses on a thorough examination of the optimization process, its objectives and the development of processes. Second, techniques of the optimization process have been evaluated, as well as some new ones that have emerged to overcome the above-mentioned problems.FindingsThis paper provided detailed knowledge of optimization, several approaches and their applications in civil engineering, i.e. structural, geotechnical, hydraulic, transportation and many more. This research provided tremendous emerging techniques, where the lack of exploratory studies is to be approached soon.Originality/valueOptimization processes have been studied for a very long time, in engineering, but the current computational power has increased the implementation for several engineering applications. Besides that, different techniques and their prediction modes often require high computational strength, such parameters can be mitigated with the use of different techniques to reduce computational cost and increase accuracy.

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“…Pooya et al [15] used the discrepancies between the modal curvature obtained from the impaired structure and the computed modal curvature as an indicator to detect damage locations. In addition, modal strain energy (MSE) has been employed for analyzing the damage condition of complex bridges [16] and a jacket offshore platform [17].…”

Section: Introductionmentioning

confidence: 99%

Damage Identification under Incomplete Mode Shape Data Using Optimization Technique Based on Generalized Flexibility Matrix

Gao,

Li,

et al. 2023

JAMP

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A generalized flexibility-based objective function utilized for structure damage identification is constructed for solving the constrained nonlinear least squares optimized problem. To begin with, the generalized flexibility matrix (GFM) proposed to solve the damage identification problem is recalled and a modal expansion method is introduced. Next, the objective function for iterative optimization process based on the GFM is formulated, and the Trust-Region algorithm is utilized to obtain the solution of the optimization problem for multiple damage cases. And then for computing the objective function gradient, the sensitivity analysis regarding design variables is derived. In addition, due to the spatial incompleteness, the influence of stiffness reduction and incomplete modal measurement data is discussed by means of two numerical examples with several damage cases. Finally, based on the computational results, it is evident that the presented approach provides good validity and reliability for the large and complicated engineering structures.

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Multiple damage detection in complex bridges based on strain energy extracted from single point measurement

Cited by 10 publications

References 39 publications

Investigation of Damage Detection in Bridge Piers using modal strain energy and modal flexibility methods: A Case Study

Investigation of Damage Detection in Bridge Piers using modal strain energy and modal flexibility methods: A Case Study

A review on developing optimization techniques in civil engineering

Damage Identification under Incomplete Mode Shape Data Using Optimization Technique Based on Generalized Flexibility Matrix

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