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Experimental Stress Analysis by U. C. Jindal

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4

Continuous Beams

4.1 INTRODUCTION

A beam carried over more than two supports is known as a continuous beam. Railway bridges are common examples of continuous beams. But the beams in railway bridges are subjected to travelling loads in addition to static loads. In this chapter, we will only consider the effect of static, concentrated, and distributed loads for the analysis of reactions and support moments. Figure 4.1 shows a beam ABCD, carried over three spans of lengths L1, L2, and L3, respectively. End A of the beam is fixed, while end D is simply supported. A the end D support moment will be zero, but at end A, supports B and C there will be support moments in the beam, to be determined. Prof. Clapeyron has provided a theorem showing the ...

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