On the cyclic behaviour of new pier-to-deck connections for short-medium span composite I-girder bridges

Performance-Based Earthquake Engineering Analysis of Short-Medium Span Steel-Concrete Composite Bridges

“…For this reason, in the new configurations, the steel flanges are not inserted into the CCB and the height of the head plate is limited (Figure 2). A broad description of these typologies and of the experimental texts can be found in Abbiati et al, [6] and Paolacci et al, [7]. In what follows the vulnerability of the selected bridge with CCB3 (see Figure 2b) is analyzed in the framework of PBEE.…”

“…This model (Figure 3) was used to analytically reproduce the experimental texts executed on I-girder subassemblies of the bridge. In [7] the results of the test campaign are presented and discussed. The aim was the definition of a refined model that faithfully approximates the real behavior of the sample and that allows the extension of the model to several cases.…”

“…Nonlinearities in the CCB were considered by modeling shear studs and prestressing bars separately. Moreover, in order to reproduce the constraint in compression due to the presence of the concrete crossbeam, four compression gap elements have been used both at left and right sides of the CCB joints at two different levels, as shown in Figure 3, [12]. A simplified evaluation of the stiffness of the gap has been performed, assuming that the compressive force coming from the girder would act uniformly on a surface equal to the area of the vertical head-plate.…”

“…The selected case study is part of a group of bridges analysed within the SEQBRI project, [3]. In this respect, fragility and damage analysis of the selected bridge are performed based on a proper component-based numerical model and a wide experimental campaign, [6][7]. These outcomes are then integrated in the decision making analysis, where the selected decision variable is the repair cost ratio of the bridge.…”