Stability of a pretensioned latticed three-dimensional arch structure with cross cable-strut arrangement

An innovative pretensioned latticed three-dimensional (3D) arch structure with cross cable-strut arrangement is proposed based on the concept of beam string structure with consideration of the indoor headroom. Three cable-strut arrangement schemes of the cable latticed 3D arch are analyzed and the in-plane stabilities of the arches with different cable-strut schemes are compared. Also, the influence of cable anchorage position on the in-plane stability of the pretensioned latticed 3D arch is investigated. The configuration and stability of the parallel cable-arch integral structure with the optimal cable-strut arrangement are studied. The effect of both the transverse diagonal cross bracings and the amount of the longitudinal latticed 3D beams on the buckling mode and stability capacity of the integral structure is studied. Additionally, the relationship between the structural stability capacity and the amount of parallel cable arches is discussed. Two simplified models for stability analysis of the integral structure are presented, and the corresponding calculation accuracies are also discussed. All this work will provide theoretical guidance to the actual engineering application of this structure.