International Research Journal of Engineering and Technology (IRJET) Volume: 05 Issue: 06 | June 2018
www.irjet.net
SKEW ANGLE V/S SHEAR FORCE
MAX SHEAR FORCE
125
2)
Poly. (MAX. SHEAR FORCE)
122.55425
120 113.41675
115
3)
109.47875
110
4)
105 0
10
20
30
40
50
SKEW ANGLE
5)
Chart -8: Ultimate Shear force v/s Skew angle The effect of skew angle on ultimate shear force due to the combined dead load and live load is represented in the chart-8. The plot shows that the ultimate shear force value shrinks as skew angle value expands. The obtained values are – 122.55 KN for 0° skew, 113.41 KN for 20° skew and 109.47 KN for 40° skew.
1) The study can be further studied for various girder
2)
SKEW V/S TORSION MAX TORSION
Linear (MAX TORSION)
MAX TORSION
10
3)
11.2205
4)
10.1040625
8 8.66945235
6
ultimate values of bending moment, shear force and torsion in bridges of varying skew angles at critical sections. The analysis results obtained have confirmed that the role of finite element model (FEM) in studying the effect due to skew angles in bridges and the design of I-Girder is an important process. In general, Bending moment & Shear force for dead & live loading conditions decreased with increasing skew angle. But the value of torsion increased with the increase in skew angle of the bridge. Hence, this is an important phenomena which cannot be neglected and it governs design. The accuracy of the analysis of skew bridges using finite element analysis may not be obtained from conventional methods. From the analysis results, it is found that the values are very accurate and the use of FEM analysis is justified.
8. SCOPE OF FURTHER STUDY
6.10 Ultimate Torsion v/s skew angle
12
p-ISSN: 2395-0072
1) This study primarily concentrated on appraisal of
6.9 Ultimate shear force v/s skew angle
MAX. SHEAR FORCE
e-ISSN: 2395-0056
sections such as – concrete box girder, precast concrete ‘I’ and ‘U’ girders, steel ‘U’ girder, concrete tee beam and concrete solid girder. Also for continuous bridges and cantilever portions of the bridge, the study can be taken up as a separate study. Design of sub-structure and foundation related to such bridges can also be taken up. The design procedure can also be studied for serviceability method including fatigue analysis.
9. REFERENCES
4 2
[1]
0 0
10
20
30
40
50
SKEW ANGLE
[2]
Chart -9: Ultimate Torsion v/s Skew angle The effect of skew angle on ultimate torsional moment due to the combined dead load and live load is represented in the chart-9. The plot shows that the ultimate torsional moment builds up linearly as skew angle value rises. The obtained values are – 8.66 KN-m for 0° skew, 10.10 KN-m for 20° skew and 11.22 KN-m for 40° skew.
[3] [4]
7. CONCLUSION
[5]
The main conclusions drawn from this study of the effect of skew angle on bending moment, shear force & torsion with various loading condition as per IRC: 6-2016 are explained below:
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Impact Factor value: 7.211
[6] |
Wodzinowski R (2018), “Free vibration analysis of horizontally curved composite concrete-steel Igirder bridges” Journal of constructional steel research, pp.0143-974X. Viet Vu Q (2018), “Effect of intermediate diaphragms on the load-carrying capacity of steelconcrete composite box girder bridges”, Journal of thin-walled structures, pp.0263-8231. Ebeido T and Kennedy J B (2017), “Shear and Reaction distribution in continuous skew composite bridges”, Journal of Bridge Engineering, pp.155-165. Deshmukh N and Dr.U.P.Waghe (2015), “Analysis and Design of Skew Bridges” International Journal of Science and Research, ISSN 2319-7064. Theoret P (2012), “Analysis and design of straight and skewed slab bridges”, Journal of Bridge Engineering, pp. 289-301. Nouri G and Ahmadi Z (2012), “Influence of Skew Angle on Continuous Composite Girder Bridge”
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