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doi:10.3850/978-981-08-7920-4_S2-A17-cd
Structural Behavior of Double-Layer Braced Barrel Vaults
Mehdi Setareh1 and Li Ma2
1School of Architecture and Design, Virginia Tech, Blacksburg, USA.
2Department of Civil Engineering, Virginia Tech, Blacksburg, USA.
ABSTRACT
Barrel vaults have been used since ancient times as an architectural form. The brick and stone
barrel vaults were used by the Romans for monumental buildings in temples and audience halls
spanning large distances. Steel double-layer braced barrel vaults (DLBBV) consisting of top and
bottom grid layers interconnected by web members have been used as the roofing system in a
number of buildings since the last century. This paper presents a study of the structural behavior
of square-on-square offset DLBBV subjected to different environmental conditions. It discusses
various issues as related to the analysis and design of these systems such as number and stiffness
of supports and different member end conditions. It also investigates the effects of rise/span
and span/depth ratios, number of modules, and the lateral stiffness of the supports on the
structural efficiency, and recommends optimum rise/span and span/depth ratios as a function
of the number of modules. Based on the results of these studies, conclusions are presented on
the design of efficient DLBBV systems in terms of the rise/span and span/depth ratios, number
of modules, number of supports and member end conditions.
Keywords: Double-layer braced barrel vaults, Square-on-square configuration, Structural efficiency, Optimum weight, Span/depth ratio, Member end condition, Number of modules, Rise/span ratio, Unbalanced snow load.
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