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INTERNATIONAL JOURNAL OF CIVIL AND STRUCTURAL ENGINEERING Volume 1, No 3, 2010

Copyright 2010 All rights reserved Integrated Publishing services

Research article

ISSN 0976

4399

Grade of steel

Fe415

The max BM and SF obtained for 2D underpass RCC bridge model considering without soil stiffness are shown in Table 1. Shear force and bending moment diagram after

analysis is shown in Figure 4 (a) & (b)

(a)

(b)

Figure 4: (a) SF diagram for 2D Analysis

(b) BMD For 2D Analysis

3.1 Validation of results

The bending moment results obtained by slope deflection method and SAP2000 program for 2 dimensional model of underpass RCC bridge are approximately same. The slight variation of results may be due to the variation of moment of inertia values. Based on this validity of results further analysis of same 2D model for various combinations of loading cases was carried out. Also it was observed that was the same corners of the 3D model the bending moment results obtained were same and hence 3D analysis was carried out using SAP2000.

Max SF

456.33

BM ­ Mid Span

572.72

BM ­ Corner

339.94

Max SF

259.92

BM ­ Mid Span

372.73

BM ­ Corner

147.11

Max SF

79.68

BM ­ Mid Span

204.67

BM ­ Corner

339.94

Member

Top Slab

Bottom Slab

Side Walls

Table 1: Max BM and Max SF of 2D

Results

Max BM & Max SF of 2D model without soil stiffness (kN­m)

562

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