Effect of soil–bridge interaction on the magnitude of internal forces in integral abutment bridge components due to live load effects

Dicleli, Murat; Erhan, Semih

doi:10.1016/j.engstruct.2009.09.001

Cited by 22 publications

(11 citation statements)

References 12 publications

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“…Earlier, it was also found in Ref. [23] that the pile properties and foundation soil stiffness do not alter the location of the maximum live load effects, which shows that it may be reasonable to extend the findings in this study to bridges with different substructure properties (such as very stiff piles) as well.…”

Section: Evaluation Of the Most Critical Loading Pattern For Various mentioning

confidence: 65%

Critical Truck Loading Pattern to Maximize Live Load Effects in Skewed Integral Bridges

Dicleli

Yalçin

2014

Structural Engineering International

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An integral bridge (IB) is one in which the abutments are cast monolithically with the deck to form a rigid frame structure. When the geometry and conditions do not allow for designing straight IBs, skewed IBs (SIBs) are designed. Current bridge design specifications are mainly developed for regular jointed bridges. Thus, provisions for SIBs have not been included in these specifications yet. Consequently, to determine live load effects in SIB components, many practicing engineers built a three-dimensional (3D) finite element model (FEM). In this study, various multiple design truck loading patterns are investigated to determine the most critical loading pattern producing the maximum live load effects in SIB components. The results of the analyses reveal that in the case of SIBs, different truck loading patterns arise when compared to bridges with no skew. Trucks that are placed diagonally across the width of the bridge are observed to produce the most unfavorable live load effects in bridge components.Keywords: skewed integral bridges; live loads; truck loading pattern; girder; abutment; pile.centerline of the bridge deck is defined as skew angle (q ) as shown in Fig. 1b. Currently, two-thirds of the bridge inventory in the USA is skewed. 5 Although skew generally decreases extreme force effects due to live load, it produces negative moments at the deck corners and torsional moments within the end zones and redistributes reaction forces at the supports. 6 Therefore, for estimating live load effects in skewed bridge components, design specifications such as AASHTO LRFD 5 (American Association State Highway Transportation Officials Load and Resistance Factor Design, 2010) require the application of skew correction factors (SCFs) to the live load distribution factors (LLDFs) obtained for straight bridges when the bridge is skewed. The LLDFs and SCFs available in AASHTO and in similar bridge design specifications are developed solely for regular jointed bridges as standard design methods for IBs have not been fully established yet. 7 Thus, many practicing engineers either incorrectly use the provisions for regular jointed skewed bridges in current bridge design specifications or build a three-dimensional (3D) finite element model (FEM) to estimate the live load effects in SIB components (girders, abutments, and piles). In the 3D FEM, accurate positioning of the design trucks in the transverse and longitudinal directions of the bridge is very important in estimating the maximum live load effect in SIB components. This is also equally important for future research studies related to the development of LLDFs for SIBs, where the LLDFs are obtained by dividing the results of 3D FEM of the bridge subjected to single or multiple truck loading (Fig. 2a) by the results of corresponding idealized two-dimensional (2D) frame model of the same bridge (Fig. 2b) under a single truck loading. 8 For straight IBs, the longitudinal position of the design trucks in a 3D FEM to create the maximum live load effect in the IB components ma...

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Section: Evaluation Of the Most Critical Loading Pattern For Various mentioning

confidence: 65%

Critical Truck Loading Pattern to Maximize Live Load Effects in Skewed Integral Bridges

Dicleli

Yalçin

2014

Structural Engineering International

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“…In spite of a lot of numerical and experimental works in passive pressure evaluation, the behaviour of this type of bridges has not already been well defined (Dicleli, Erhan 2010;Erhan, Dicleli 2009;Fang et al 1994Fang et al , 2002Fang, Ishibashi 1986;James, Bransby 1970;Kim, Laman 2010b;Noorzaei et al 2010).…”

Section: Fig 2 a Schematic View Of Integral Bridges Abutmentmentioning

confidence: 96%

An Investigation on the Effect of Cyclic Displacement on the Integral Bridge Abutment

Movahedifar

Bolouri-Bazaz

2014

Journal of Civil Engineering and Management

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The integral bridge abutment, as a special type of retaining wall, is subject to cyclic displacement, which is due to the daily and seasonal temperature variations. The frame of this type of bridges is rigid and jointless. This requires that the slab of the bridge to be longitudinally continuous without expansion joints. This causes cyclic displacement to be imposed to the backfill material of integral bridge abutment. It should be pointed out that the omission of expansion joints helps to provide a fluent traffic and a reduction in maintenance and repair of the bridges. To investigate the impact of cyclic displacement on the loose backfill soil behaviour, an innovative laboratory retaining wall model has been designed and constructed to imitate the cyclic behaviour of backfill granular material. In addition, a numerical model, based on finite element method, has been developed to interpret the experimental results. This model was calibrated using the laboratory test data. The results indicate that the passive pressure, except for low amplitude displacement, escalates with progressive number of cycles and its distribution is not linear, which is due to the forming arch.

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“…A relatively new signal processing technique, Hilbert-Huang transformation (HHT), has been developed for processing nonlinear and non-stationary signals [15,16]. This method does not have linearity limit as the Fourier transform-based methods [17]. HHT-based method consists of two main elements: empirical mode decomposition (EMD) and Hilbert spectral analysis [15].…”

Section: Vibration Interpretationmentioning

confidence: 99%

Detection of soil-abutment interaction by monitoring bridge response using vehicle excitation

Huffman

Xiao

Chen

et al. 2015

J Civil Struct Health Monit

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This paper aims to explore fundamental characteristics of bridge vibration spectra to potentially evaluate soil-abutment interactions and changes in abutment earth pressures. To this aim, the bridge response to the excitation of an approaching vehicle on road is utilized to evaluate the transmissibility of the road-soil-abutmentbridge (r-s-a-b) path. By comparing the FFT spectrums of bridge acceleration responses before and upon a vehicle traversing over an abutment, we found that the response spectrum consists of specific frequency of vehicle excitation, even though the bridge response before vehicle traversed over the abutment has a much smaller magnitude. This suggests that the bridge response before the vehicle traversed over the abutment is sensitive enough to be used to characterize the dynamic features of r-s-a-b transmissibility. Hilbert-Huang Transform method is used to extract the non-stationary information of the moving vehicle excitation from the bridge responses to characterize the r-s-ab transmissibility. It is found that specific signature associated with the specific frequency of vehicle excitation can be extracted from the Hilbert spectrum of empirical modal decomposition signals, and this signature could be readily quantified as a monitoring index which exhibits time-varying property.

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Effect of soil–bridge interaction on the magnitude of internal forces in integral abutment bridge components due to live load effects

Cited by 22 publications

References 12 publications

Critical Truck Loading Pattern to Maximize Live Load Effects in Skewed Integral Bridges

Critical Truck Loading Pattern to Maximize Live Load Effects in Skewed Integral Bridges

An Investigation on the Effect of Cyclic Displacement on the Integral Bridge Abutment

Detection of soil-abutment interaction by monitoring bridge response using vehicle excitation

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