Segmented arch structure

Abstract

Abstract An arch structure is prefabricated from compression segments, the structure generally comprising one or more arch arcs with end anchor elements. Each arch segment comprises a trapezoidal frame structure fabricated from short lengths of sawn lumber, and fastened at the corner junctions of the respective individual members to form the respective arch segment element. The arch radius is determined by segment geometry. The arch segments are assembled in combination with one or more elongated pre-stressing elements and the pre-stressing elements tensioned to a sufficient extent, relative to the geometry and applied load to be born by the arch, that, in combination with other inter-element mechanical fastening means such as nails or bolts the arch elements are maintained substantially under compression across the abutting segment end faces. The arch is generally pin jointed at its ends, and frequently at the center thereof, to preclude the development of local bending moments at the base and apex of the arch. Internal segment braces form a diamond-brace construction, having a lateral brace thereacross. An alternative X-brace construction, usually combining therewith a lateral pair of struts to the center points of the parallel frame members of the trapezoidal frame, can be used. Shifting of the axis of compression may also be readily effected with use of K-form bracing and single side or double sided sheath bracing.

Inventors

• 👤 Allan T. Quaile

Bibliographic Details