The concept of floating submerged tunnels becomes increasingly attractive idea to cross the straits. The structural solution in these bridges includes buoyancy force on tunnel body plus tension in mooring tethers. This paper investigates the effect of submergence on the dynamic response of submerged floating tunnels due to Moving load. The inertial effect of the fluid on the submerged structure is accounted for by evaluating the added mass in deep and shallow waters. Then the effect of Moving load velocity on the dynamic amplification factor for mid span displacement is evaluated. The results show that while the inertial effect of fluid reduces the critical velocity, closely spaced tethers provides a means to increase this velocity and could be used to control the Moving load effect. Although increasing the tether stiffness increases the critical velocity, at the same time it results in the escalation of the impact factor.

A prismatic beam made of a behaviorally nonlinear material is analyzed under a harmonic load Moving with a known velocity. The vibration equation of motion is derived using Hamilton principle and Euler-Lagrange Equation. The amplitude of vibration, circular frequency, bending moment, stress and deflection of the beam can be calculated by the presented solution. Considering the response of the beam, in the sense of its resonance, it is found that there is no critical velocity when the behavior of the beam material is assumed to be physically nonlinear.

A numerical method for processing and correction of pavement deflection measurements recorded by Moving load deflect meters is presented. The method takes into account some peculiarities inherent to this kind of device, such as multiple load system, displacement of the reference plane and initial deflection at the beginning of measurements. Results of the method evaluation are drawn from validation tests, using known theoretical solutions and absolute deflection measurements. Application of the method to different pavement structures and measuring devices demonstrates an improvement of measurement results through processing the required corrections. 

The structural analysis of an infinite unsymmetric laminated composite Timoshenko beam over Pasternak viscoelastic foundation under Moving load is studied. The beam is subjected to a travelling concentrated load. Closed form steady state solutions, based on the first-order shear deformation theory (FSDT) are developed. In this analysis, the effect of bend-twist coupling is also evaluated. Selecting of an appropriate displacement field for deflection of the composite beam and using the principle of total minimum potential energy, the governing differential equations of motion are obtained and solved using complex infinite Fourier transformation method. The dynamic response of unsymmetric angle-ply laminated beam under Moving load has been compared with existing results in the literature and a very good agreement is observed. The results for variation of the deflection, bending moment, shear force and bending stress are presented. In addition, the influences of the stiffness, shear layer viscosity of foundation, velocity of the Moving load and also different thicknesses of the beam on the structural response are studied.