Determining Orders of Modes Sensitive to Hinge Joint Damage in Assembled Hollow Slab Bridges

Jian, Zhang; Yi, Ting‐Hua; Qu, Chunxu; Li, Hong‐Nan

doi:10.1061/(asce)be.1943-5592.0001834

Cited by 20 publications

(7 citation statements)

References 28 publications

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“…This evaluation involve a comparison of results obtained before and after the occurrence of damage. Zhang et al (2022b) determines the orders of modes sensitive to hinge damage in assembled hollow slab bridges, which is instructive for vibration-based hinge damage detection. Various factors contributing to potential damage were investigated, including fatigue damage (Li 2015) and temperature and humidity (Hussein et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Performance monitoring of assembled beam bridges using displacement spectrum similarity measure

Zheng,

Dan,

Zhong

2023

Advances in Structural Engineering

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The assembled beam bridge is a widespread construction, with transverse connections uniting precast beams to jointly support loads. These connections, while crucial, are the most vulnerable elements in such structures. Therefore, the development of an effective index for continuous condition assessment remains the cornerstone of structural health monitoring. The Displacement Spectrum Similarity Measure index, as per ideal conditions in numerical simulations, has shown insensitivity to short-term vehicle loads and sensitivity to transverse connection stiffness. This study extends its scope to address potential real-world interference factors, including measurement errors and deck pavement damage. Specifically, we introduce Gaussian white noise to simulate measurement errors and incorporate additional vehicle loads to emulate the impact of pavement damage. Numerical simulations confirm the robustness of the index against these challenges. Additionally, a real-time index extraction scheme is proposed and implemented on an operational bridge. The results reveal a close alignment between the transverse connection condition assessed by the index and the findings obtained through on-site surveys, thereby substantiating the viability and effectiveness of the index for real-world engineering contexts.

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Section: Introductionmentioning

confidence: 99%

Performance monitoring of assembled beam bridges using displacement spectrum similarity measure

Zheng,

Dan,

Zhong

2023

Advances in Structural Engineering

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“…Force is transmitted between hollow-core slabs through joints. However, most hollow-core slab bridges in China adopt joints without transverse ties, and the transverse connection between hollow-core slabs is weak [ 1 , 2 ]. With the increase in traffic load and traffic volume, many in-service hollow-core slab bridges have suffered structural damage [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Study on Load Transfer Mechanism of Local Curved Prestressed Hollow-Core Slab Bridge

2023

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The assembled hollow-core slab bridge is the most widely used beam bridge in China. With the increasing traffic volume and traffic load in China, the joints of the hollow-core slab bridge are prone to damage. In this paper, a hollow-core slab bridge with locally curved prestressed tendons is proposed. Based on the static load test of a beam with joints taken from the cross section of a hollow-core slab bridge in practical engineering, a finite element nonlinear analysis is used to simulate the test, and the concrete and interface parameters under the correct analysis results are obtained. Finally, the parameters are applied to the three-beam and two-joint hollow-core slab bridge with a span of 10 m and a finite element analysis is carried out to explore the total failure process and performance improvement effect of the prestressed hollow-core slab bridge. The results show that the interface unit method can successfully simulate the new-to-old concrete interface where the joint is in contact with the precast beam segment. Compared with the static load test results, the analysis error of each finite element model is basically within 15%. Compared with the traditional hollow-core slab bridge, the cracking load, through-joint load, and ultimate load of the prestressed hollow-core slab bridge are increased by 50.0%, 91.7%, and 66.7%, respectively. Under the same load, the stress of the U-bar, the relative deflection of both sides of the joint, and the maximum width of the joint of the prestressed hollow-core slab bridge are lower than those of the traditional hollow-core slab bridge. When the ultimate load is reached, the longitudinal crack lengths of the traditional hollow-core slab bridge and the prestressed hollow-core slab bridge are 0.48 L and 0.4 L, respectively, and the damage degree of the prestressed hollow-core slab bridge is lower than that of the traditional hollow-core slab bridge.

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“…Dynamic ambient tests can be a valuable aid in calibrating FEM models to be used for the analyses [23], and they can also bring different behaviours of the various parts of complex buildings or blocks of houses to the forefront [24]. Similar techniques are employed in dynamic damage detection methods for structural health purposes [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Testing in Support of the Seismic Assessment of a Century Old Masonry Building Complex

et al. 2022

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The vulnerability assessment of existing masonry buildings is a largely investigated research topic with some aspects still to be faced. In historic towns, masonry buildings are aggregated and together confined, and their final appearance is derived from interventions and additions during their lives in different times and with different masonry textures or different construction materials. Demolitions and reconstructions of some parts were frequent, with the difficulty of now understanding the effectiveness of the mutual constraints. The seismic assessment of a case study of a 175-year-old building complex in Udine (Italy) provides an opportunity to use the results of ambient vibration tests to face the problem of modelling aggregate buildings for their seismic assessment. The “Padiglione Lodi” building complex was built in 1847 and extended and renovated several times afterwards. It was built mostly using URM with limited use of reinforced concrete. It consists of a main building and three wings (western, central and eastern). The inspections, experimental survey and analysis of the available documentation are used to suitably calibrate a Finite Element Model of the whole complex. Moreover, this allows the singling out of the central wing, as the unit needs more careful investigation. Non-destructive dynamic testing is then applied to the central wing in order to further validate the model and improve the knowledge of the interaction of the unit with the rest of the building. General remarks on the effective application of non-destructive dynamic analysis in conjunction with other methods to the seismic assessment of large URM building complexes are drawn.

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Determining Orders of Modes Sensitive to Hinge Joint Damage in Assembled Hollow Slab Bridges

Cited by 20 publications

References 28 publications

Performance monitoring of assembled beam bridges using displacement spectrum similarity measure

Performance monitoring of assembled beam bridges using displacement spectrum similarity measure

Study on Load Transfer Mechanism of Local Curved Prestressed Hollow-Core Slab Bridge

Dynamic Testing in Support of the Seismic Assessment of a Century Old Masonry Building Complex

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