Static and stability analyses of pretensioned latticed arch frame with integrated cable-strut arrangement

Abstract

Abstract For the latticed arch frame, a new type of integrated cable-strut arrangement is proposed. The comparison analysis on the static property and stability of the new-type pretensioned latticed arch frame with the traditional ones is conducted. The rational values of the arrangement parameters of the integrated cable-strut system, such as the strut location, cable sag, intersection position of the oblique cables, and the cable pretension ratio, are obtained by optimization analysis. Also, the analysis on configuration parameters of the pretensioned latticed arch frame, such as the ratio of rise to span, latticed column height, and the cross-sectional height of the latticed arch, is investigated. Moreover, the stability of the integral structure consisting of multiple parallel pretensioned latticed arch frames with integrated cable-strut system is studied in detail. The results indicate that the vertical and lateral stiffness of the latticed arch frame can be enhanced effectively by adopting the integrated cable-strut arrangement, and thus the static property and stability can be improved significantly. The effect of the pretensioned cable-strut system on improving the structural performance increases with increase of the latticed column height gradually, but it declines with increase of the cross-sectional height of latticed arch. The buckling mode of the integral structure depends on the number of the middle longitudinal latticed 3D beams.