This paper is published in Volume 2, Issue 3, 2019
Area
Civil Engineering
Author
Ravindra Bhagirath Joshi
Co-authors
Madan S. H., Dr. V. A. Patil, S. R. Takkalaki
Org/Univ
B R Harne College of Engineering and Technology, Mumbai, Maharashtra, India
Pub. Date
03 April, 2019
Paper ID
V2I3-1147
Publisher
Keywords
Skew Slab, Fem, Griilage, Comparison, Skew Angle, Obtuse Angle, Acute Angle

Citationsacebook

IEEE
Ravindra Bhagirath Joshi, Madan S. H., Dr. V. A. Patil, S. R. Takkalaki. Comparative study of skew slab bridges using Grillage analogy and Finite element method, International Journal of Advance Research, Ideas and Innovations in Technology, www.IJERnD.com.

APA
Ravindra Bhagirath Joshi, Madan S. H., Dr. V. A. Patil, S. R. Takkalaki (2019). Comparative study of skew slab bridges using Grillage analogy and Finite element method. International Journal of Advance Research, Ideas and Innovations in Technology, 2(3) www.IJERnD.com.

MLA
Ravindra Bhagirath Joshi, Madan S. H., Dr. V. A. Patil, S. R. Takkalaki. "Comparative study of skew slab bridges using Grillage analogy and Finite element method." International Journal of Advance Research, Ideas and Innovations in Technology 2.3 (2019). www.IJERnD.com.

Abstract

Presently constructed bridges are often skew. The configuration of such a structure is the result of natural or man-made obstacles such as complex intersections, space limitations, and/or mountainous terrains. Gravity loads in many skew bridges take a different path towards the support than right bridges. In skew bridges, this brings about significant torsion moments near the obtuse corner, changes in longitudinal as well as transverse bending moments and changes in support reactions. In this present study, a solid slab bridge deck studied using grillage and finite element method. The effect of different skew angles on same-span of reinforced concrete bridges using the finite-element method and the grillage analogy method is compared. Maximum and Minimum reactions forces, deflections, Bending moments in the central strip and edge strip calculated and compared for both analysis methods. A total of twenty different models prepared, five for each method on skew angles 00, 150, 300, 450 and 600 with rigid supports. The supports then changed to elastomeric bearing supports to compare the change in hogging bending moments. The prototype chosen for comparison is 11m long and 12m wide deck slab without footpath but with edge beam. The slab thickness chosen is 800mm. The longitudinal members aligned along a square direction so that reinforcement can be calculated directly without the need for resolution. The grillage properties are given as per book by E.C. Hambly and FEM elements modelled as per book by G. A. Rombach. It is observed that the finite element method (FEM) and Grillage method yield similar results and in a few cases FEM gives lesser results. Bending moments calculated by using grillage analogy method overestimates the results obtained by the FEM method.
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