Experimental and numerical approaches for structural assessment in new footbridge designs (SFRSCC–GFPR hybrid structure)

Abstract

Experimental and numerical approaches for structural assesment in new footbridge desings (SFRSCC-GFPR hybrid structure), Composite Structures (2015), doi: http://dx. AbstractWithin the civil engineering field, the use of the Finite Element Method has acquired a significant importance, since numerical simulations have been employed in a broad field, which encloses the design, analysis and prediction of the structural behaviour of constructions and infrastructures. Nevertheless, these mathematical simulations can only be useful if all the mechanical properties of the materials, boundary conditions and damages are properly modelled. Therefore, it is required not only experimental data (static and/or dynamic tests) to provide references parameters, but also robust calibration methods able to model damage or other special structural conditions. The present paper addresses the model calibration of a footbridge bridge tested with static loads and ambient vibrations. Damage assessment was also carried out based on a hybrid numerical procedure, which combines discrete damage functions with sets of piecewise linear damage functions. Results from the model calibration shows that the model reproduces with good accuracy the experimental behaviour of the bridge.

Experimental investigation of cracking behaviour of concrete beams reinforced with steel fibres produced in Lithuania

“…For particular fibre volume ratios and compressive strengths, the formation of several cracks in the pure bending zone complicates measurement of the crack opening and hampers assessment of the deflections (Gopalaratnam 1995). Both approaches, nevertheless, are capable of predicting post-cracking behaviour of SFRC (Blesak et al 2016;Groli, Caldentey 2016;Iqbal et al 2015); however, addition of bar reinforcement complicates assessment of the residual effect of the fibres (Gribniak et al 2012;Sanchez-Aparicio et al 2015). The moment-curvature relationships of the full-scale beams are shown in Fig.…”

On the use minor and non-destructive methods for the safety evaluation of an historic RC bridge: the Bôco Bridge

“…Showing a mean error of 6.23% in frequencies and an average MAC value of 0.93. [21], was used to find the minimum of the cost function previously defined [2]. After 14 iterations, the cost function converges in a minimum, throwing the following results (Table 4).…”

Experimental and analytical studies on shear behaviors of FRP-concrete composite sections

“…Substituting Eqs. ( 8), ( 9), (11), and ( 12) into ( 13), 𝑠 ′ (𝑥) = 𝜙(𝑥)ℎ 𝑜 − 𝑁 𝐶 (𝑥) 𝐸 𝐶 𝐴 𝐶 − 𝑁 𝐹 (𝑥) 𝐸 𝐹𝑥 𝐴 𝐹 (14) where ℎ 0 is the distance between the neutral axis of concrete and FRP, given by ℎ 0 = ℎ C +ℎ 𝐹 2…”