Irjet V7i4357 PDF
Irjet V7i4357 PDF
Irjet V7i4357 PDF
© 2020, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1866
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 07 Issue: 04 | Apr 2020 www.irjet.net p-ISSN: 2395-0072
a = -R (1 – Cosφ ) EQ-1.2.6
b = R Sin φ EQ-1.2.7
2
Mx = dMx = ( b ) (w dl ) = R w ( 1- cosθ ) EQ-1.2.7
1.2 Analysis of curved girder 0 0
L L
2
A curved girder with a horizontal radius of curvature of is My = dMy = ( a ) (w dl ) = R w (θ - sinθ ) EQ-1.2.7
taken into account. The girder is assumed to possess a hard 0 0
and fast support at one end and a free support at the The moment Mx is that the bending moment of the curved
opposite end. This assumption for the boundary conditions girder at the support and therefore the moment My is that
doesn't hurt the generality of the matter. Also, it's assumed the torsional moment developed within the cross section of
that the girder is under the uniform gravity load of. The the girder at support. The noticeable fact is creation of
length of the girder is and therefore the angle subtended by torsional moment because of just gravity load, like self
the girder is Ѳ. weight, which is unheard within the case of straight girders.
To verify the above equations, the values of Mx and My are
evaluated for a special case of R=∞ which could be a straight
girder,
© 2020, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1867
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 07 Issue: 04 | Apr 2020 www.irjet.net p-ISSN: 2395-0072
2) Pragya Soni and Dr. P.S. Bokare Many studies have more initial torsional modes but whereas for
are available on suitability of box beam bridges for straight bridge the initial modes were transverse
various spans and effect of stresses for skewed box and longitudinal. The amplifications in torsion were
beam bridge. The curvilinear nature of box beam large compared to other parameters for curved and
bridges together with their complex deformation skewed bridges compared to straight bridge.
patterns and stress fields have led designer adopt
approximate and conservative methods for his or 5) Vraj J. Shah - This paper present a literature review
her analyses and style. Recent literature on straight associated with Curved span PSC beam. The
and curved box beam bridges has prohibited curvilinear nature of beam bridges with their
analytical formulations to raised understand the complex deformation patterns and stress fields
behavior of those complex structural systems. It had have led designers adopt conservative methods for
been found that researchers have used finite analysis & design. Recent literature on curved
element method for the analysis of box Beam girder bridges to know the complex behavior.
Bridge. However, not much studies are available for Within the present study a trial has been made to
the look of box beam bridge. Hence, this study review the importance of PSC Box Girders & Type,
emphasized on the look and analysis of box beam Curvature effect of span, superload effect, wrapping
structure. The literature also indicates that the stress in curved beam, Shear Lag & Torsion effect
assorted researchers have used ANSYS, MIDAS and thanks to curvature. Comparative study of study &
Stadd-Pro for the analysis of Pre-stressed Concrete design of PSC T-girder with PSC beam using
Structures using FEM. software Staad - pro, Normal & Skew beam with
3) Ashish B Sarode, G R Vesmawala - The different geometrical combination has been
horizontally curved alignments for the urban included.
interchanges or highway bridges are getting more
common and it's necessary to construct the 6) M K Harish, V R Chethan and B T Ashwini – The
structures curved in plan. Because of the effect of design of a Highway bridge is critically conditional
horizontal curvature of the box girders, torsional standards and criteria for the protection, quality
moments are predominant. Also the support and overall cost of the project. beam bridges are
reactions on the outer supports increase whereas terribly unremarkably used. The box girder
on inner support decreases, which can leads the ordinarily includes of pre-stressed concrete, steel or
instability of the box beam. The outer web is longer steel concrete. Various software's is used for the
than the inner web because of which the mid-span Analysis and style of bridges which is able to be far
deflections are more at the outer web than the inner better and fewer time consuming compared to
web. During this paper, the many models for curved manual calculations. This project discusses the
box girders are analysed using LUSAS FEA software Analysis of beam bridges under AASHTO loading of
for various parameters like span lengths, radii and two differing types Single1cell and Multi cell with
loadings and also the flexural and trosional AASHTO standard codes followed superstructures
behavior, stability and mid-span deflections of the subjected to load of heavy vehicles to grasp its
curved box girders of assorted parameters are structural behaviour and to come to a decision
discussed. which section is healthier when comparing the ends
up in determining the economical section all told
4) Syed Habibunnisa, Komma Hemanth Kumar aspects for the assumed problem statement. Also to
Reddy and Mukkala Priyanka - In this paper a grasp about the modelling pattern using CSi bridge
parametric comparison was made between straight and to grasp the structural behaviour1considering
bridge and different curved bridges and skew the bridge object responses and horizontal
bridges. Then these bridges were analyzed for dead, moments of both single cell and multi cell box
modal and moving load cases. This was tired order girders under AASHTO loading conditions.
to review difference within the results obtained
between straight, curved and skewed bridges for 7) Rishabh Jain and Mr. Ajit Singh - This paper
dead and moving load cases. The modeling a part of presents a literature review on the duration Curved
the both bridges was done by using SAP 2000 Box PSC beam. The curvilinear nature of beam
within which there's an option named bridge bridges with their complex patterns of deformation
wizard by which modeling of the bridge can tired a and stress fields have led designers to adopt
sequential order. After analyzing for burden case conservative methods for analysis and style. Recent
unlike straight bridge there's torsion within the literature on curved girder bridges to know the
curved and skew bridges along the length of the complex behavior. during this study, an endeavor
bridge as there's unsymmetrical mass distribution was made to review the importance of the PSC Box
in curved bridge about horizontal axis. Modal Girders & Type, the wide curvature effect, the effect
analysis showed the curved and skewed bridges of the payload, packaging stress in curved girder
© 2020, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1868
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 07 Issue: 04 | Apr 2020 www.irjet.net p-ISSN: 2395-0072
Box, Shear Lag & Torsion effect because of the and pushover results were tabulated and compared
curvature. Comparative Study of the analysis and with other bridge models. The software used for the
style of the PSC T-beam with the PSC beam with the study is CSI Bridge 2016 v18 subjected to seismic
Staad software - pro, Normal and Skew beam with
load subjected to code of 1893 2002 and IRC 6 for
different geometrical combinations has been
included. vehicle loading.
© 2020, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1869
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 07 Issue: 04 | Apr 2020 www.irjet.net p-ISSN: 2395-0072
© 2020, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1870