Nonlinear Analysis of RC Box Culverts Resting on a Linear Elastic Soil

Abstract

In the analyses presented, the soil-structure interaction is accounted for by means of a FE-BIE approach, in which the structure is modelled with displacement-based beam finite elements, whereas the boundary between structure and substrate is described in terms of surface tractions by means of a boundary integral equation incorporating a suitable Green's function. This mixed formulation ensures full continuity between structure and substrate in terms of displacements and rotations. To take account of structural nonlinearities, potential plastic hinges are defined at the end sections of the beam elements in the form of semi-rigid connections characterized by a rigidplastic moment-rotation relationship. The incremental analyses carried out emphasize the effectiveness of the model in reproducing collapse mechanisms and stiffness loss of the structure for increasing loads. Moreover, the adopted formulation is able to capture both interfacial shear tractions and vertical normal tractions which develop along the substrate boundary under a variety of loading conditions.

Dynamic analysis of soil structure interaction by the spectral element method

“…To obtain significant responses using this method, the entire system must be discretized to a large number of finite and infinite elements which complicate the computational task [8]. The FEM is employed as a device to describe the behavior both of the beam and soil medium having various profiles [9,10].…”

Volume 2: …and SGAMR Goes!

“…A summary of selected papers from highly ranked, international scientists can be found in (Bedon et al, 2018a). Among the submitted contributors, the covered topics are various and equally important for the science and knowledge development and include an insight on innovative reinforcement techniques for masonry walls (Akhoundi et al, 2018) the design of a multifunctional hybrid steel-glass structure (Froli and Laccone, 2018); the application of diagnostic surveying to existing buildings (Concu et al, 2018) the nonlinear behaviour of RC culverts on elastic soil (Baraldi et al, 2018). The application of infrared thermography approaches for the characterization of painted masonry vaults in historical buildings is proposed by (Casapulla et al, 2018).…”

Special Issue on Current Challenges in Materials Design

“…Zucca et al (2018) discussed the structural design of an important complex building in Milan. Baraldi et al (2018) presented a significant numerical approach for non linear problems of soil-structure interaction.…”