Prediction of vertical deflections for a long-span prestressed concrete bridge structure

Robertson, Ian

doi:10.1016/j.engstruct.2005.05.013

Cited by 92 publications

(45 citation statements)

References 1 publication

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“…e creep and drying shrinkage predictions presented in ACI 209R-92 [3] were used to calculate the rate of creep and shrinkage over time, r t . For creep and shrinkage under standard condition, the relationship between at any time and at final is given by (13) and (14), respectively. v t � t 0.…”

Section: Advances In Civil Engineeringmentioning

confidence: 99%

“…However, the reliability of such predictions has not been sufficiently verified, and these methods are difficult and complicated for designers to understand and use. In addition, due to recent advances in computer technology, many researchers are trying to predict and evaluate the long-term behavior of PSC bridges by numerical analysis using the finite difference method or finite element method [12][13][14][15][16][17], but for designers, a simple and clear prediction method is more preferable.…”

Section: Introductionmentioning

confidence: 99%

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Modified PCI Multipliers for Time-Dependent Deformation of PSC Bridges

Lee

Kwangmo

Park

2018

Advances in Civil Engineering

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Nowadays prestressed concrete (PSC) bridges have become very common, but there are still many difficulties in predicting their longterm behavior. In order to predict the long-term behavior of PSC bridges, it is possible to use very complex formulas developed by various researchers or numerical analysis through computer, but many engineers are having difficulty in using such methods. Moreover, the accuracy of the prediction result is not satisfactory compared to the effort. On the contrary, the PCI Bridge Design Manual proposes a method that can easily predict the long-term behavior using multipliers. However, this method does not take into account various construction schedules and has some assumptions that are inadequate for the current situation in various girder sections and topping thicknesses. erefore, in this study, new long-time factors were developed by modifying the multipliers of the PCI Bridge Design Manual by a rational manner. is allows prediction of long-term behavior of bridges taking into account various construction schedules and the characteristics of modern girder sections. e prediction results of the long-term camber and deflection of PSC bridges using the proposed multipliers were compared with those using the basic PCI Bridge Design Manual, the improved PCI Bridge Design Manual, KR C-08090 (same as ACI 318-14), and numerical analysis. As a result, the newly proposed method makes possible to predict the long-term behavior at any time after casting, and the accuracy of the prediction is also improved.

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Section: Advances In Civil Engineeringmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modified PCI Multipliers for Time-Dependent Deformation of PSC Bridges

Lee

Kwangmo

Park

2018

Advances in Civil Engineering

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“…The size of the vertical displacement can be predicted or interpolated in advance. [2] The problem and the subject of this research refer to two realistic stochastic researches with the following objectives: exceptional transports and deformation analysis of bridges in Slovenia.…”

Section: Introductionmentioning

confidence: 99%

Deformation Analysis of Bridges in Exceptional Transports in Slovenia

Kamnik¹,

Kovačić²,

Štrukelj³

2012

PROMET

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“…Methods based on visual inspection are expensive and may not provide reliable results so there is a trend of increasing use of bridge instrumentation. Bridge instrumentation involving a power source, data acquisition electronics and many sensors is already common practice for bridge damage detection in larger bridges [10,[14][15][16]. This approach is known as direct monitoring [17,18].…”

Section: Introductionmentioning

confidence: 99%

Damage detection using curvatures obtained from vehicle measurements

O’Brien

Martínez

Malekjafarian

et al. 2017

J Civil Struct Health Monit

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This paper describes a new procedure for bridge damage identification through drive-by monitoring. Instantaneous Curvature (IC) is presented as a means to determine a local loss of stiffness in a bridge through measurements collected from a passing instrumented vehicle. Moving Reference Curvature (MRC) is compared with IC as a damage detection tool. It is assumed that absolute displacements on the bridge can be measured by the vehicle. The bridge is represented by a finite element (FE) model. A Half-car model is used to represent the passing vehicle. Damage is represented as a local loss of stiffness in different parts of the bridge. 1% random noise and no noise environments are considered to evaluate the effectiveness of the method. A generic road surface profile is also assumed. Numerical simulations show that the local damage can be detected using IC if the deflection responses can be measured with sufficient accuracy. Damage quantification can be obtained from MRC.

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Prediction of vertical deflections for a long-span prestressed concrete bridge structure

Cited by 92 publications

References 1 publication

Modified PCI Multipliers for Time-Dependent Deformation of PSC Bridges

Modified PCI Multipliers for Time-Dependent Deformation of PSC Bridges

Deformation Analysis of Bridges in Exceptional Transports in Slovenia

Damage detection using curvatures obtained from vehicle measurements

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