scholarly journals Review on Analysis of Free Vibrational Horizontally Curved Bridges

2021 ◽  
Vol 9 (VII) ◽  
pp. 3463-3469
Author(s):  
Manish Mishra
Keyword(s):  
Finite Element ◽  
Concrete Bridges ◽  
Design Parameters ◽  
Horizontally Curved ◽  
Girder Bridges ◽  
Fundamental Frequencies ◽  
Girder Bridge ◽  
Vibration Parameters ◽  
Horizontally Curved Bridges ◽  
Composite Steel

Curved I-girder concrete bridges give an outstanding answer to urban congestion, traffic, and pollution concerns, but the combined flexibility and torque responses of the bridges make their behavior exceedingly complex. That is why structural design parameters for simplified design procedures are in high demand, as measured by empirical equations. To analyze the effect on the free vibrational reaction of curve composite steel-concreteI-girder bridge with varying vibration parameters, this research employs a sensitivity analysis. To learn the fundamental frequency and the geometric configuration of the model forms, a parametric investigation is performed. Finite element Modelling of composite steel/concrete frameworks, deformable shear model, fine element formula, finite element mounting, finite element calibration, and finite element modeling, etc. Modeling finite element. Sensitivity research to draw the fundamental frequencies for the evaluated bridges. The parametric research outcomes. The results. Curved I-girder bridges of composite steel with single span or multi-span lengths are presented.

Intermediate Diaphragms Arrangement in Horizontal Curved Composite Box-Girder Bridge with Corrugated Webs

2011 ◽  
Vol 94-96 ◽  
pp. 326-331
Author(s):  
Jun He ◽  
Bin Han ◽  
Yu Qing Liu ◽  
Ai Rong Chen
Keyword(s):  
Normal Stress ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Initial Curvature ◽  
Horizontally Curved ◽  
Girder Bridges ◽  
Torsion Effect ◽  
Corrugated Webs ◽  
Parametric Studies ◽  
Girder Bridge

Horizontally curved box girder bridges inherently exhibit complex torsional and distortional behavior as well as bending due to the initial curvature. As to the horizontal curved composite box-girder bridges with corrugated webs, diaphragms were arranged reasonably to reduce torsional and distortion effect for safety and stability due to the coupling of bending and torsion effect for initial curvature and reduced bending stiffness in horizontal direction for corrugated steel webs. Finite element models for a 3-spans continuous horizontal curved composite box girder bridges with corrugated webs were established. Comparing the ratio of warping normal stress to bending normal stress, the influence of the number and spacing for diaphragms on distortion control for curved bridges is investigated. Extensive parametric studies (including central angle, the aspect ratio of the box section, the spacing of the intermediate diaphragms)are performed and the design suggestions for the maximum spacing of the intermediate diaphragms are presented.

Study of a curved continuous composite box girder bridge

1993 ◽  
Vol 20 (1) ◽  
pp. 107-119 ◽  
Author(s):  
S. F. Ng ◽  
M. S. Cheung ◽  
H. M. Hachem
Keyword(s):  
Finite Element ◽  
Structural Response ◽  
Shell Element ◽  
Elastic Response ◽  
Box Girder ◽  
Girder Bridges ◽  
Bridge Model ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
Critical Sections

To better understand the behaviour of curved box girder bridges in resisting eccentric design truck loads, and the influence of plan curvature on the structural response, a model study was conducted at the University of Ottawa. In this study, the elastic response of a curved composite box girder bridge model was evaluated experimentally and confirmed analytically using the finite element method. Analytical predictions of both vertical displacements and normal stresses at critical sections compared fairly well with those evaluated experimentally. The isoparametric thin shell element employed in the analysis proved to be versatile and provided an accurate representation of the various structural components of a curved box girder bridge. Despite the eccentric nature of the applied OHBDC design truck loads and the bridge plan curvature, it was evident that in resisting the applied live loads, the girders at critical sections share equal proportions of the applied bending moments. Key words: bridge, curved, cellular, composite, eccentric loads, static, linear, experimental, finite element.

Positioning of bearings for curved continuous spread-box girder bridges

2002 ◽  
Vol 29 (5) ◽  
pp. 641-652 ◽  
Author(s):  
Magdy Samaan ◽  
Khaled Sennah ◽  
John B Kennedy
Keyword(s):  
Finite Element ◽  
Natural Frequencies ◽  
Structural Response ◽  
Element Model ◽  
Extensive Study ◽  
Mode Shapes ◽  
Box Girder ◽  
Girder Bridges ◽  
Bridge Superstructure ◽  
Girder Bridge

The type and arrangement of bearings for a bridge superstructure are important considerations in bridge design. For a curved continuous spread-box girder bridge, the support conditions for the bridge superstructure may significantly influence the distribution factors for maximum stresses, reactions, and shear forces as well as the bridge natural frequencies and mode shapes. Current design practices in North America recommend very few guidelines for bearing arrangements and types. This paper describes an extensive study carried out using an experimentally calibrated finite element model, in which curved continuous prototype bridges were analyzed to determine their structural response. Six different types and arrangements of support bearings were studied to determine their effect on the maximum stress and reaction distributions as well as on the natural frequencies of such bridges. The results were used to suggest the most favourable bearing arrangement and type.Key words: bridge bearings, composite, continuous, curved bridges, design, distribution factors, finite element, spread-box.

scholarly journals Study on the Old Girders in the Widening Hollow Slab Girder Bridge

2018 ◽  
Vol 38 ◽  
pp. 03028
Author(s):  
Ying Wang ◽  
Li Fang Zhang ◽  
Hai Yan Ma
Keyword(s):  
Finite Element ◽  
Construction Project ◽  
Internal Force ◽  
Finite Element Models ◽  
Foundation Settlement ◽  
Bridge Structure ◽  
Girder Bridges ◽  
Vehicle Load ◽  
Girder Bridge

Taking the bridge widening project of Shanghai-Hangzhou-Ningbo expressway widening construction project (China) as the background in this paper, the variation law of the internal force of the old bridge in the widening hollow slab girder bridge under vehicle load is studied, which is under the condition of different span lengths and different widening widths. Three different span lengths of the pre-tensioned prestressed hollow slab girder bridges are selected, the spatial finite element models of both the old bridge and the whole structure of widening bridge are established and calculated respectively by Midas/Civil software. The influences of widening and load increasing on the old bridges under the vehicle load are compared and analyzed. In addition, the authors also analyze the influences of different widening widths on the force state of old bridges under the condition of widening the same number of lane. Moreover , the effects on the old bridges that are caused by the uneven foundation settlement of widening bridge structure are also studied in this paper. This paper can provide some references for widening design of hollow slab bridges.

scholarly journals Evaluating the Effectiveness of Continuous Composite Beams for Steel-Concrete Bridges and Control Concrete Cracks of the Supports at an Early Age

2019 ◽  
Vol 97 ◽  
pp. 03007
Author(s):  
Trong-Chuc Nguyen ◽  
Trong-Phuoc Huynh ◽  
Nguyen-Trong Ho ◽  
Al-Amin Abdun Noor
Keyword(s):  
Reinforced Concrete ◽  
Composite Beams ◽  
Concrete Bridges ◽  
Early Age ◽  
Expansion Joints ◽  
Reinforced Concrete Slabs ◽  
Steel Girder Bridge ◽  
Girder Bridge ◽  
And Control ◽  
Composite Steel

This study presents a solution to contextualized span bridges constructed with composite steel girders with reinforced concrete slabs by reinforced concrete. This kind of structure, in comparison with a simple span, has many advantages as overcoming internal forces, reducing large displacements and cutting the number of expansion joints. Also, numerical simulations were conducted to evaluate the effectiveness of continuous composite beams for steel-concrete bridges and control of cracking of concrete at the supports at an early age. The models and conclusions in this paper can provide safety guidance for construct composite steel girder bridge in Vietnam.

Free vibration behaviour of thin-walled concrete box-girder bridge using Perspex sheet experimental model

2021 ◽  
Vol 2 (106) ◽  
pp. 56-76
Author(s):  
V. Verma ◽  
K. Nallasivam
Keyword(s):  
Finite Element ◽  
Free Vibration ◽  
Curved Bridges ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Thin Walled ◽  
Concrete Box Girder ◽  
Box Girder Bridge ◽  
Girder Bridge

Purpose: Curved box-girder bridges offers an excellent solution to the problems associated with traffic congestion. However, owing to their complex geometry, they are subjected to shear lag, torsional warping and cross-sectional distortion, which must be assessed in their study and design. Furthermore, the dynamic behaviour of curved bridges adds to the complexity of the issue, emphasizing the importance of studying free vibration. The purpose of this study is to numerically model the concrete curved box-girder bridge considering torsional warping, distortion and distortional warping effects and to identify key parameters that influence the free vibration response of the box-girder bridge by validating it with experimental and analytical studies. Design/methodology/approach: The concrete bridge is numerically modelled by means of computationally effective thin-walled box-beam finite elements that consider torsional warping, distortion and distortional warping, which are prominent features of thinwalled box-girders. The free vibration analysis of the concrete curved box-girder bridge is performed by developing a finite element based MATLAB program. Findings: The identification of critical parameters that influence the free vibration behaviour of curved thin-walled concrete box-girder bridges is one of the main findings of the study. Each parameter and its effect has been extensively discussed. Research limitations/implications: The study limits for the preliminary design phase of thin-walled box-girder bridge decks, where a complete three-dimensional finite element analysis is unnecessary. The current approach can be extended to future research using a different method, such as finite element grilling technique on multi-span curved bridges having unequal span.

ACCURATE MODELING OF CURVED STEEL I-GIRDER BRIDGE

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Yifan Zhu ◽  
Chaoran Xu ◽  
Chung C. Fu
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Vertical Shear ◽  
Finite Element Models ◽  
Refined Model ◽  
Shell Elements ◽  
Curvature Effects ◽  
Girder Bridges ◽  
Girder Bridge ◽  
Curved Steel

A curved and/or skewed steel I-girder bridge, in addition to the basic vertical shear and bending effects, will be subjected to torsional and warping effects. Thus, simplified hand calculation and line girder methods, might not be enough when bridges are to be analyzed. Refined methods, termed by AASHTO, have to be adopted. This paper has investigated the closeness and difference between curved bridge finite element models using 2-D gird and 3-D shell elements of I-girders, both are part of AASHTO refined method. Moreover, the results are calibrated by comparing analysis result with various two-dimensional and three-dimensional computations with varied curvature effects. It is concluded that when introducing torsional effects to finite element models, the modified torsional constant J with consideration of warping effect should be taken into the 2-D grid model as a refined model. When using 3-D shell elements as the refined model, stiffeners and connection plates play an important role of global model stiffness and should not be ignored, especially for sharp curved steel I-girder bridges.

Analysis of Continuous Girder Bridge Based on Different Codes

2013 ◽  
Vol 361-363 ◽  
pp. 1311-1314
Author(s):  
Meng Ying Liu ◽  
Bang Zhe Liu
Keyword(s):  
Finite Element ◽  
Comparative Analysis ◽  
Girder Bridges ◽  
Calculation Results ◽  
Continuous Girder Bridge ◽  
The Difference ◽  
Girder Bridge

As the object to continuous girder bridges of movable formwork construction,for the same real bridge according to the new code and old code respectively establish finite element mode and for the corresponding calculation and checked, through the comparative analysis about construct materials, calculation conditions and the calculation results, etc,to discuss the difference of the design results between the new standard and the old standard, in order to accumulated useful experience about designing new bridge and reinforcing and reforming old bridge.

scholarly journals Free Vibration Analysis Of Horizontally Curved Composite Concrete Deck Over Steel I-Girder Bridges

2021 ◽  
Author(s):  
Radek A. Wodzinowski
Keyword(s):  
Free Vibration ◽  
Fundamental Frequency ◽  
Parametric Study ◽  
Free Vibration Analysis ◽  
Sensitivity Study ◽  
Design Parameters ◽  
Curved Bridges ◽  
Horizontally Curved ◽  
Girder Bridges ◽  
Free Vibration Response

Curved composite I-girder bridges provide an excellent solution to problems of urban congestion, traffic and pollution, but their behavior is quite complex due to the coupled bending and torsion response of the bridges. Moreover, dynamic behavior of curved bridges further complicates the problem. The majority of curved bridges today are designed using complex analytical methods; therefore, a clear need exists for simplified design methods in the form of empirical equations for the structural design parameters. In this thesis paper, a sensitivity study is conducted to examine the effect of various design parameters on the free-vibration response of curved composite I-girder bridges. To determine their fundamental frequency and corresponding mode shape an extensive parametric study is conducted on 336 straight and curved bridges. From the results of the parametric study, simple-to-use equations are developed to predict the fundamental frequency of curved composite I-girder bridges. It is shown that the developed equations are equally applicable to curved simply supported and composite multi-span bridges with equal span lengths.

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