What shape describes the locus of the reaction forces in a two-hinged semi-circular arch?

Theory of Structures MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Theory of Structurescivil-engineering-mcqs › theory-of-structures
Published
17 Jan 2019
Last updated
28 May 2026

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Explanation

The reaction forces in a two-hinged semi-circular arch lie along a straight line, making option A the correct choice. Other conic sections such as parabolas, circles, or hyperbolas do not represent this locus.

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