Ultimate Strength Formula for Central-Arch-Girder Bridges

Experimental Study on the Out-of-Plane Buckling Strength of Steel Arches With Open Cross Section

“…(6) Effect of the type of bracing system Since the St. Venant torsional rigidity of thin-walled member with open cross section is much smaller than that of a member with closed cross section, there was a possibility that the contribution rate of the bracing system type-P which mainly resists torsion of the arch rib might come close or superior to that of the bracing system type-L for the arch model with open profile ribs. In order to examine the effect of bracing system on increase in ultimate strength, the experimental results of specimen No.…”

“…(5) The axial force of diagonal members induced by the axial shrinkage of the arch rib is quite significant for proportioning diagonal members as well as the axial force caused by the usual design lateral load. (6) The large lateral bending occurs in the end portions of arch ribs where no lateral bracing is located, while the lateral bending moment of the arch rib in the braced portion is fairly small. It is possible to increase the ultimate strength of twin arches having unbraced portion by strengthening the arch ribs in the unbraced portion.…”

Proposed residual stress model for roller bent steel wide flange sections

“…the stress value at the top of the web or bottom of the web is different from the stress value in the middle of the top flange or middle of the bottom flange, respectively). A stress jump is a stress change over an infinitesimal distance and can also be found in residual stress models for welded sections, [20] (Fig. 3(b)).…”

“…Studies on in-plane buckling have been presented by Pi and Trahair [17] and Pi et al [18]. Finite element analyses on inelastic out-of-plane buckling were carried out by Komatsu and Sakimoto [19], Sakimoto and Komatsu [20], Pi and Trahair [21], Pi and Bradford [22] and Pi and Bradford [23]. The finite element computations led to the development of design rules to obtain the resistance for steel arches.…”

Design rules for out-of-plane stability of roller bent steel arches with FEM

“…Research studies included experiments conducted on arches with square hollow sections by Sakimoto et al [7] and welded I-sections by Sakata and Sakimoto [8] supplemented with finite element analyses by Komatsu and Sakimoto [9], Sakimoto and Komatsu [10] and Sakimoto and Komatsu [11]. These Japanese research studies culminated in design rules.…”