Analytical and experimental study of a skew bridge model

Meng, Junyi; Ghasemi, Hamid; Lui, Eric M.

doi:10.1016/j.engstruct.2004.03.013

Cited by 25 publications

(14 citation statements)

References 12 publications

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“…To simplify the calculation, it is assumed in some research projects [6][7][8][9][10] that the entrance and outlet section of the span have zero displacements with respect to the bridge. In this present study, to evaluate the effects of lateral spans, two additional side-spans are modeled before and after the considered span, as depicted in Fig.…”

Section: Boundary Conditionmentioning

confidence: 99%

“…Nevertheless, the interaction of the components of the superstructure was not taken into account in this model. Meng et al [7] performed comprehensive laboratory and numerical tests to study the response of a skewed steel bridge. The main aim of the project was to create a laboratory model of a skewed bridge for further laboratory tests, and calibration of a three dimensional finite element model.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Analysis of Two-lane Skewed Bridge and High-speed Train System

Jahangiri

Zakeri

2019

Period. Polytech. Civil Eng.

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Bridges are vital in the operation of railway networks since any hindrances to their operation could suspend the flow of traffic. An important characteristic of bridges highly affecting their behavior is the skew angle. In this paper, a sensitivity analysis is performed to identify the effects of skew angle on train-track interaction for single-and double-sided crossings of a high-speed train. Comprehensive three-dimensional finite element models of the bridge and vehicle are developed, which are then calibrated using dynamic field test results. Effects of skew angle on shape modes and modal frequencies, acceleration values, and bridge displacement in various crossing speeds are studied. The results showed that if the bridge skew angle is more than 15°, it will affect the modal shape and frequency of the bridge. When the skew angle is less than 15°, the results of the bridge displacement are similar to those of the bridge with skew angle of zero. However, with the increase of the skew angle, the deformation value of the bridge decreases and the speed corresponding to the maximum displacement value also varies. Finally, the results of acceleration due to the speed and skew angle of the bridge are not the same in one-way and two-way passing states. Keywordsbridge-train interaction, high-speed train, finite element model, single-and double-sided crossings, dynamic field test verification 696|

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Section: Boundary Conditionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of Two-lane Skewed Bridge and High-speed Train System

Jahangiri

Zakeri

2019

Period. Polytech. Civil Eng.

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“…The goal of this paper is to gather bridge frequencies quickly and accurately in situ, rather than expend valuable time and resources to complete inefficient and relatively inaccurate estimates. Other literature, such as Meng et al (2004), attempts to estimate dynamic properties for a class of bridges, but there is not yet a unified procedure for doing this for the variety of bridges that comprise our transportation network. To begin testing, the researchers collected frequency response from ambient vehicle traffic and periodic jumping data at midspan, approximately one meter south of the centerline using an iPhone 6 accelerometer with the frequency spectrum feature in the Vibration Analysis application.…”

Section: Modeling and Predictionsmentioning

confidence: 99%

Development of RDSETGO: A Rapidly Deployable Structural Evaluation Toolkit for Global Observation

Riley¹

2018

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“…Another contribution of this research is to examine the impact of NF ground motions on the fragility curves for skewed bridges in California. Extensive studies have been conducted to investigate the effect of skewness (Amjadian et al 2016;Dimitrakopoulos 2011;Huo and Zhang 2013;Maleki 2002;Mangalathu et al 2018;Meng et al 2004;Ramanathan et al 2015) on the bridge responses. However, studies on examining the effect of NF ground motions on structural responses are yet scarce.…”

Section: Introductionmentioning

confidence: 99%

Skew Adjustment Factors for Fragilities of California Box-Girder Bridges Subjected to near-Fault and Far-Field Ground Motions

2019

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Past reconnaissance studies revealed that bridges close to active faults are more susceptible to damage and more than 60% of the bridges in California are skewed. To assess the combined effect of near-fault ground motions and skewness, this paper evaluates the seismic vulnerability of skewed concrete box-girder bridges in California subjected to near-fault and far-field ground motions. The relative risk of skewness and fault-location on the bridges is evaluated by developing fragility curves of bridge components and system accounting for the material, geometric, and structural uncertainties. It is noted that the skewness and bridge site close to active faults make bridges more vulnerable, and the existing modification factor in HAZUS cannot capture the variation in the median value of the fragilities appropriately. A new set of fragility adjustment factors for skewness coupled with the effect of fault location is suggested in this paper.

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Analytical and experimental study of a skew bridge model

Cited by 25 publications

References 12 publications

Dynamic Analysis of Two-lane Skewed Bridge and High-speed Train System

Dynamic Analysis of Two-lane Skewed Bridge and High-speed Train System

Development of RDSETGO: A Rapidly Deployable Structural Evaluation Toolkit for Global Observation

Skew Adjustment Factors for Fragilities of California Box-Girder Bridges Subjected to near-Fault and Far-Field Ground Motions

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