After the experimental samples were produced, they were subjected to three-point
bending moment in the universal tensile testing device at a compression speed of 1 mm/min at a room temperature of 24 [degrees]C and in a humid environment of 35% (Fig.
By increasing the ratio [zeta] of the flexural rigidity of the cable and girder from 0.1 to 5.0, the maximum
bending moment of the stiffening girder decreases by 77%, 79% and 81% under the ratio of short-term to permanent loading [gamma] = 1, 2 and 3 respectively.
The thrust and
bending moment contours of lining obtained by numerical 2D and 3D analysis are respectively shown in Figures 9, 10.
Such attempts are made by (Bazi, Hajj, and Itani 2005; Gheitasi and Harris 2015), (Kim, Kim, and Park 2013), and (Sennah and Kennedy 1999; Seo, Phares, and Wipf 2014) who have used the loading configuration recommended by (American Association of State Highway and Transportation Officials 2010), AASHTO, to determine the design equations for distribution factors of
bending moment and shear force of composite box girder bridges.
Comparing the deflection, rotation angle, normalized
bending moment, and shear force of the existing tunnel with constant stiffness based on the three models, the new method is verified.
The
bending moment M and shear force Q along the beam are given as
and the
bending moment [M.sub.b](x) = [q.sub.t]/2 [x.sup.2] - [q.sub.t]L/2 (5/4 + 3[[tau].supo.2])x + [q.sub.t][L.sup.2]/2 (3[[tau].sup.2] + 1/4).
In Tables 4-6, the
bending moment resulting in the tensile stress in the inner element of the structure is positive.
The magnitude and unsteadiness of the tower out-of-plane displacement, as well as the primary
bending moment of the base of the tower reveals differences in the fatigue-inducing loads to the tower.