Nonlinear fatigue damage assessment of existing bridges considering progressively deteriorated road conditions

Zhang, Wei; Cai, C.S.; Fang, Pan

doi:10.1016/j.engstruct.2013.06.027

Cited by 34 publications

(15 citation statements)

References 24 publications

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“…Secondly, since an overloaded truck is the most significant factor leading to fatigue damage, reasonable traffic control with respect to truck overloading will impact the stress spectrum (Cohen et al 2003). Finally, since the fatigue is a time-relevant issue, the time-variant factors should also be considered, including the RRCs and the traffic growth (Wang et al 2016b;Zhang et al 2013).…”

Section: Stress Spectrum Simulationmentioning

confidence: 99%

Fatigue Stress Spectra and Reliability Evaluation of Short- to Medium-Span Bridges under Stochastic and Dynamic Traffic Loads

Yan

Luo

et al. 2017

J. Bridge Eng.

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This study presents a novel approach to simulating the fatigue stress spectra of short-to medium-span bridges under stochastic and dynamic traffic loads. The stochastic traffic load is simulated based on the weigh-in-motion (WIM) measurements of a heavy-duty highway bridge in China, and the dynamic effects are modeled using a vehicle-bridge coupled vibration system. An interpolation response surface method (RSM) is used to approximate the effective stress ranges of a bridge with respect to road roughness conditions, gross vehicle weights, vehicle configurations, and driving speeds. The RSM provides a platform for an efficient spectrum simulation of bridges under stochastic and dynamic traffic loads. A case study of a simply supported T-girder bridge demonstrates the effectiveness and efficiency of the proposed approach. The proposed computational framework provides an effective approach for simulating the fatigue stress spectra for short-to medium-span bridges with WIM data.

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Section: Stress Spectrum Simulationmentioning

confidence: 99%

Fatigue Stress Spectra and Reliability Evaluation of Short- to Medium-Span Bridges under Stochastic and Dynamic Traffic Loads

Yan

Luo

et al. 2017

J. Bridge Eng.

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“…Consider a pile of depth L , which is subjected to a restraining force H 0 and an external moment M 0 in the Y–Z plane, where Y axis is along the force direction and Z axis is along the pile length. Let the pile is divided into N number of segments (Figure 10) depending on the number of soil layers having individual subgrade reactions 34 then

L = l_{1} + l_{2} + l_{3} + \dots + l_{i} + \dots + l_{N} .

…”

Section: Description Of the Fib Model Usedmentioning

confidence: 99%

Temperature‐driven fatigue life of reinforced concrete integral bridge pile considering nonlinear soil–structure interaction

Verma

Mishra

2020

Structural Concrete

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In this study, a five‐span fully integral reinforced concrete (RC) bridge has been investigated for fatigue life assessment of its RC piles considering the effects of environmental temperature variation and nonlinear soil characteristics. The effect of daily temperature variation on the abutment wall and pile foundation has been estimated. Multilayers of soil along the abutment pile depth have been considered in the formulations. The soil has been represented as 3D nonlinear springs. A new fatigue model has been used for crack initiation and propagation in the RC piles. In this model, a crack has been assumed to progress successively in three stages from the tension side of the pile. Finite element (FE)‐based modeling and analyses have been carried out to determine the longitudinal displacements and bending moment in piles, abutments, and piers. Furthermore, taking the bending moment as input crack mouth opening distance, crack propagation and fatigue life of pile have been assessed using the FE method‐based software. It is seen that the abutment piles suffer fatigue damage earlier as compared to the pier‐piles as a result of thermal and vehicular loads effects. Also, thermal fluctuation has shown little or no fluctuations in the longitudinal displacements of abutment and piles in the multispan fully integral bridge (FIB). It is expected that the proposed method will be helpful for the bridge engineers in designing the pile foundation passing through multiple soil layers against fatigue damage of a FIB in particular subjected to thermal and vehicular loading.

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“…The independent overlaid pavement is a rigid structural layer with both bending resistance and shearing resistance. Most of existing studies on overlaid pavement mainly have focused on the mechanical analysis, design theory, material properties, and disease prevention [9][10][11][12][13][14][15], but only few have analyzed the stresses shared by the overlaid pavement and girder. The reinforcement of bridge structures with small and medium spans by overlaid pavement was introduced from the perspective of applicable conditions, material requirements, mechanical characteristics, design calculation, construction measures, and process quality control [7].…”

Section: State Of the Artmentioning

confidence: 99%

Effect of Overlaid Pave ment on Transverse Load Distribution in Existing Assembly Slab Bridges

Wang¹,

Liu²,

Wei³

et al. 2017

JESTR

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The bearing capacity of old assembly slab bridges is reduced by component cracking, material aging, and structural damage. To avoid excessive dismantling of bridges with inadequate bearing capacity, the influence mechanism of overlaid pavement on existing assembly slab bridges was analyzed by theoretical analysis and numerical simulation in this study. The basic equation for assembly slab bridges was established by considering the bending resistance and shearing resistance of the overlaid pavement and based on the fundamental principle of force method. The formula for the vertical coordinate of the influence line of the transverse load distribution (TLD) was constructed using a half-sine unit load. On this basis, the variations in the vertical coordinate with rigidity, slab width, and bridge span were analyzed. Moreover, the influences of the overlaid layer thickness on assembly slab bridges with different spans (13, 16, and 20 m) were analyzed. Results show that the overlaid pavement can significantly affect the influence line of the TLD. The influence of the overlaid pavement on the TLD factor should be taken into account for assembly slab bridges with spans of 16 m or smaller. However, such influence is negligible for bridges with spans of 20 m or larger. The overlaid pavement can increase structural integrity and reduce the TLD factor to some extent. But an overlaid pavement thickness of more than 20 cm only slightly influences the TLD factor. The study can meet the demand of reconstruction of old bridges based on overlaid pavement. The proposed method solves issues related to the low bearing capacity of these old assembly slab bridges.

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Nonlinear fatigue damage assessment of existing bridges considering progressively deteriorated road conditions

Cited by 34 publications

References 24 publications

Fatigue Stress Spectra and Reliability Evaluation of Short- to Medium-Span Bridges under Stochastic and Dynamic Traffic Loads

Fatigue Stress Spectra and Reliability Evaluation of Short- to Medium-Span Bridges under Stochastic and Dynamic Traffic Loads

Temperature‐driven fatigue life of reinforced concrete integral bridge pile considering nonlinear soil–structure interaction

Effect of Overlaid Pave ment on Transverse Load Distribution in Existing Assembly Slab Bridges

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