Modeling for Assessment of Long-Term Behavior of Prestressed Concrete Box-Girder Bridges

Huang, Haidong; Huang, Shanglian; Pilakoutas, Kypros

doi:10.1061/(asce)be.1943-5592.0001210

Cited by 49 publications

(22 citation statements)

References 25 publications

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“…For a statically indeterminate bridge structure, which will experience the process of system transformation during construction, the influence of creep and shrinkage on the structural behavior is more complicated. Of the many analysis methods, the method of step‐by‐step recurrence can easily handle this complex process and can be combined with the existing general finite element method (FEM) software; thus, this method has been widely used in practical engineering . Equation indicates that the creep strain at t n and t n + 1 can be expressed as

C ((),,, t_{n + 1}, t_{j}, σ_{t_{j}}) - C ((),,, t_{n}, t_{j}, σ_{t_{j}}) = \frac{1}{(1 - d (t_{j}))} \sum_{i = 1}^{m} a_{i} ((), t_{j}) e^{- λ_{i} ((), t_{n} - t_{j})} ([], 1 - e^{- λ_{i} normalΔ t_{n + 1}}) .

…”

Section: D Creep and Shrinkage Calculation Model Based On Materials Nmentioning

confidence: 99%

“…Owing to their merits in construction, maintenance, and cost, long‐span prestressed concrete (PC) box girder bridges with the balanced cantilever method are widely used around the world. However, such bridges have generally suffered excessive deflection, cracking, and other diseases during their service lives . Bazant et al collected the excessive deflection histories of 56 PC box girder bridges around the world and found that the deflection of the bridges would last for a long time; thus, it was inferred that many other bridges suffer the same issue.…”

Section: Introductionmentioning

confidence: 99%

“…Even worse, the increased deflection will further promote the expansion of existing cracks and the emergence of new cracks. The unexpected deflection and cracking have profound impacts on the serviceability and safety of PC box girder bridges, and many researchers agree that the creep and shrinkage effects of concrete are the main causes of this phenomenon …”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is necessary to consider the influence of the shear lag effect on the creep law . Using linear creep theory, Huang analyzed the long‐term deflection of the Jiangyin Yangtze River Bridge and found that the long‐term creep deformation value increased by 24.5% if the shear lag effect in box girders is considered.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Three‐dimensional nonlinear creep and shrinkage effects of a long‐span prestressed concrete box girder bridge

Yang

et al. 2018

Structural Concrete

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To analyze the impacts of creep and shrinkage effects on the behaviors of long‐span prestressed concrete box girder bridges, a new nonlinear analysis model of creep and shrinkage effects that comprehensively considered three‐dimensional (3D) characteristics and girder damage evolution was presented. A corresponding numerical analysis method was implemented into the ABAQUS user‐supplied subroutine; this method was verified by comparing the analytical results to the classical experimental results. Finally, a continuous rigid frame bridge with a main span of 220 m was taken as an engineering example, and the analysis results and in situ measured data of long‐term deflection were compared. The results show that the 3D characteristic and the nonlinear property of creep have significant impacts on the prediction of long‐term deflection.

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C ((),,, t_{n + 1}, t_{j}, σ_{t_{j}}) - C ((),,, t_{n}, t_{j}, σ_{t_{j}}) = \frac{1}{(1 - d (t_{j}))} \sum_{i = 1}^{m} a_{i} ((), t_{j}) e^{- λ_{i} ((), t_{n} - t_{j})} ([], 1 - e^{- λ_{i} normalΔ t_{n + 1}}) .

…”

Section: D Creep and Shrinkage Calculation Model Based On Materials Nmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Three‐dimensional nonlinear creep and shrinkage effects of a long‐span prestressed concrete box girder bridge

Yang

et al. 2018

Structural Concrete

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show abstract

“…During the 1980s and 1990s, researchers focused on the structural analysis [4][5][6][7], since the box girder presented a complex problem. Later, other research topics arose, such as, the structural behavior at different construction stages [3,8], the durability conditions and their effect on the strength conditions [9,10], deflections during construction [11], long-term behavior [12], life-cycle assessment [13,14] and multi-criteria decision making methods applied to the sustainable bridge design [15].…”

Section: Introductionmentioning

confidence: 99%

Parametric study of concrete box-girder footbridges

Yepes¹,

Pérez-López²,

Alcalà³

et al. 2018

JCEMI

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This paper presents a study of the parametric variability of post-tensioned concrete box-girder pedestrian bridges. SAMO2 algorithm is used for the parametric study. This algorithm combines SA with a mutation operator, to find the economic solutions. A span-length parametric study analyzes the characteristics for the best design of a three-span deck in which the main span ranges from 30 to 60 m. The depth and the number of strands were adjusted according to span length, while the thickness of the slabs presented the same optimum values in all cases. Results show that the amount of steel and volume of concrete per square meter of deck shows a good correlation with the main span length. This study demonstrates that by increasing the main span length by one meter, the total cost per square meter of the deck increases by 6.38 euros on average. Thus, this paper shows the relationship between the span length and geometrical and steel variables to produce and build a cost-efficient pedestrian bridge.

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Creep and shrinkage in prestressed concrete beams: An experimental study

Williams,

Menon,

Prasad

2024

Structural Concrete

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The existing creep and shrinkage models used for predicting long‐term behavior of prestressed concrete (PSC) beams are originally developed for cylinders under axial compression. This experimental study investigates the creep behavior in axial and flexural compression and attempts to verify the suitability of the standard models for application in PSC beams. The study is carried out by monitoring the strains and the prestress losses in four PSC beams having the same cross‐section, subject to prestress loading alone, and the strains in two axially loaded cylinders, under ambient environmental conditions for a duration of 365 days. The effects of drying, stress gradient across the depth, bonding of prestressing steel, and high reinforcement have been considered. The experimental results have been compared with the predictions by six standard models (AASHTO, ACI 209R‐92, GL 2000, B3, MC2010, and Eurocode model). For the PSC beams, the predictions from standard models are based on a numerical three‐dimensional finite element model that accounts for the stress variation with time due to prestress loss and the effect of reinforcement. The results show that creep behavior in flexural compression is different from that in axial compression and most of the standard models over‐estimate the strains in PSC beams considered in the present study. The study also provides an overview of the relative accuracies of the standard models and has practical relevance in the design of PSC bridges and estimation of prestress loss.

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Modeling for Assessment of Long-Term Behavior of Prestressed Concrete Box-Girder Bridges

Cited by 49 publications

References 25 publications

Three‐dimensional nonlinear creep and shrinkage effects of a long‐span prestressed concrete box girder bridge

Three‐dimensional nonlinear creep and shrinkage effects of a long‐span prestressed concrete box girder bridge

Parametric study of concrete box-girder footbridges

Creep and shrinkage in prestressed concrete beams: An experimental study

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