Investigation of in-plane stability in bending-active arches

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Symmetric instability generally supports a higher peak load than antisymmetric instability under similar conditions.
Larger span ratio arches may first show negative mid-span deflection under uniformly distributed loads.
Hinged arches with mid-span concentrated loads exhibit looping load-deflection behavior with varying span ratios.
Fixed supports result in unique behavior at certain span ratios, contrasting with standard instability patterns.

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Analysis reveals in-plane instability modes in bending-active arches, indicating crucial factors like span ratio and loading type.

Xie et al. (2025) studied this question.

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