Damage Mechanism of Control Springs in Modular Expansion Joints of Long-Span Bridges

Guo, Tong; Huang, Li‐Bo; Liu, J.; Yi, Zhuangpeng

doi:10.1061/(asce)be.1943-5592.0001255

Cited by 23 publications

(13 citation statements)

References 13 publications

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“…δ SE / δ NE , δ SW / δ NW , δ NE / δ SE , and δ NW / δ SW are 1.045, 1.0006, 0.9569, and 0.9994, respectively. Based on Equations and , the LBS values are calculated as k NE = 6.54 × 10, k NW = 7.02 × 10, k SE = 6.26 × 10, and k SW = 7 × 10 6 N/m. The above analysis indicates that the LBS of four locations are slightly different.…”

Section: Lbs Formula Derivation and Calculationmentioning

confidence: 99%

“…One end of the spring is connected to the bridge deck, and the other end is connected to the reference points, which are fixed. The calculated LBSs of k NE = 6.54 × 10, k NW = 7.02 × 10, k SE = 6.26 × 10, and k SW = 7 × 10 6 N/m are input to the Combin14 elements in the end of the bridge deck. Since the temperature distribution along the longitudinal direction of the deck is not uniform as shown in Figure c, the main girder is divided into nine segments, each being loaded different measured temperature.…”

Section: Lbs Formula Derivation and Calculationmentioning

confidence: 99%

“…Bridge expansion joints are designed to accommodate expansion and contraction of the bridge resulting from a variety of factors such as thermal effect, concrete shrinkage, creep, live loading, settlement of the foundation and substructure, and environmental variations . Effective functioning of expansion joints is required not only for smooth traffic but also for ensuring bridge performance in extreme events, such as earthquakes and hurricanes.…”

Section: Introductionmentioning

confidence: 99%

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Condition analysis of expansion joints of a long‐span suspension bridge through metamodel‐based model updating considering thermal effect

Xia

Wan

et al. 2020

Struct Control Health Monit

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Summary Expansion joints of bridges are vulnerable to damage due to the thermal expansion and contraction, vehicle traffic, and so forth. Currently, the temperature–displacement relationship model may be the only qualitative method for condition evaluation of bridge expansion joints using the field monitoring data. The quantitative assessment based on the finite element model updating techniques is heavy computational burden and time consuming. Therefore, a Gaussian process (GP) metamodel‐based model updating method is proposed in this study and performed for the quantitative identification on the boundary condition of the expansion joints of Jiangyin Suspension Bridge using the long‐term displacement and temperature monitoring data. At first, the relationship between the longitudinal boundary stiffness (LBS) and structural temperature is formulated on the basis of thermal effects of the bridge deck. The range of LBS is approximately estimated by the regression coefficients from 1‐year monitoring data and is used as initial bounds for the subsequent model updating procedure. The GP metamodel is formulated to map the relationship between the LBS and the longitudinal displacements under the thermal effects. The LBS identification of the Jiangyin Suspension Bridge is performed within the fast‐running GP metamodel. The results show that the longitudinal displacements using the updated LBS are in good agreement with the measurements, which verifies the effectiveness of GP metamodel‐based model updating method in identifying the LBS of the long‐span suspension bridge.

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Section: Lbs Formula Derivation and Calculationmentioning

confidence: 99%

Section: Lbs Formula Derivation and Calculationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Condition analysis of expansion joints of a long‐span suspension bridge through metamodel‐based model updating considering thermal effect

Xia

Wan

et al. 2020

Struct Control Health Monit

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“…e huge accumulative displacement caused by traffic or wind loads during the operational stage is an important reason for the damage of the end attached facilities [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Girder Longitudinal Movement and Its Factors of Suspension Bridge under Vehicle Load

Huang

Li³

et al. 2021

Advances in Civil Engineering

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Vehicle load may not only cause vertical deformation and vibration of suspension bridge but also lead to longitudinal deformation and vibration. And the longitudinal behavior is closely related to the durability of the girder end devices and the bending fatigue failure of suspenders. In this study, the longitudinal deformation behavior and longitudinal vibration of suspension bridge under vehicles, as well as the related influencing factors, are investigated. The underlying mechanism of girder longitudinal movement under the moving vehicles is revealed. Based on the simplified vehicle model of vertical concentrated force, the characteristics of main cable deformation and girder longitudinal displacement under vertical loads are analyzed first. Then, the longitudinal motion equation of the girder under vertical moving loads is derived. Finally, a single long-span suspension bridge is employed in the case study, and the girder longitudinal response and influencing factors are investigated based on both numerical simulation and field monitoring. Results indicate that the asymmetric vertical load leads to cable longitudinal deflection owing to the geometrically nonlinear characteristic of the main cable, leading to longitudinal movement of the girder. The results of field monitoring and numerical simulation indicate that the girder moves quasi-statically and reciprocates longitudinally with centimeter amplitude under normal operational loads.

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“…In the design of bridge structures, the function of expansion joints is to provide a good connection between the bridge deck and pavement or bridge deck and bridge deck during free expansion [1,2]. The expansion joint is the weak part of a bridge structure [3].…”

Section: Introductionmentioning

confidence: 99%

Shear Load-Displacement Curves of PVA Fiber-Reinforced Engineered Cementitious Composite Expansion Joints in Steel Bridges

Yin

Yan

et al. 2019

Applied Sciences

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The concrete in the transition strips of expansion joints can become damaged prematurely during the service period. Polyvinyl alcohol (PVA) fiber-reinforced engineered cementitious composite (ECC) is a kind of high ductility concrete material, and its ultimate uniaxial tensile strain is more than 3%. It can be used to improve the damage status of expansion joints. Based on previous research results, ECCs were used in the pilot project of bridge expansion joints. Under this engineering background, the shear load-displacement curves of ECC expansion joints were studied through 27 groups of compression-shear tests of ECC/steel composite structures. The shear failure characteristics of ECC expansion joints were analyzed by the digital image correlation method. A shear load-displacement curve model of the composite structures was proposed based on the equivalent strain assumption and Weibull distribution theory. The results show that the failure mode of the composite structure specimens was ECC shear cracking. Stress and strain field nephograms were used to explain the failure characteristics of the composite structure specimens. The calculated curves of the shear load-displacement model of the composite structures were in good agreement with the experimental curves. The work is of great importance to the shear design of ECC expansion joints and their further engineering applications.

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Damage Mechanism of Control Springs in Modular Expansion Joints of Long-Span Bridges

Cited by 23 publications

References 13 publications

Condition analysis of expansion joints of a long‐span suspension bridge through metamodel‐based model updating considering thermal effect

Condition analysis of expansion joints of a long‐span suspension bridge through metamodel‐based model updating considering thermal effect

Girder Longitudinal Movement and Its Factors of Suspension Bridge under Vehicle Load

Shear Load-Displacement Curves of PVA Fiber-Reinforced Engineered Cementitious Composite Expansion Joints in Steel Bridges

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