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Numerical modelling of innovative DST steel joint under cyclic loading

Lemos A., Da Silva L. S., Latour M., Rizzano G.

Archives of Civil and Mechanical Engineering

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2018

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Vol. 18, no. 3

687--701

EN

This paper addresses the numerical simulation of an innovative double split Tee beam-to-column joint fitted with a dissipative friction damper, recently proposed at the University of Salerno. The innovative connection prevents damage to all other structural components with the exception of one component of the connection that is specially designed to dissipate the input energy of a seismic hazard by means of the slippage of a friction material. The main topics herein presented are the development of a strategy for the numerical modelling of complex friction problems and a detailed numerical model of the overall beam-to-column joint equipped with the friction device. The joint is subjected to both monotonic and cyclic loading conditions. The numerical modelling was developed using the Finite Elements Method (FEM) with Abaqus Software. Sliding force–displacement curves are obtained for two damper materials and an estimation of their wearing is presented. To evaluate the accuracy of the numerical model, moment–rotation curves of the joint are compared with the experimental curves. The FE results show good correlations and confirm the potential interest of this novel joint typology to achieve easily replaceable details in case of a seismic event.

2

Structural behaviour of prestressed stayed columns with single and double cross-arms using normal and high strength steel

Martins J. P., Shahbazian A., Da Silva L. S., Rebelo C., Simoes R.

Archives of Civil and Mechanical Engineering

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2016

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Vol. 16, no. 4

618--633

EN

One solution to improve load carrying capacity of slender columns is to add prestressed cables and cross-arms as they provide additional restraints along the length. Such columns are called prestressed stayed columns (PSSC). This solution is very effective, but there are no experimental results on long columns which is a practical case for such columns. This paper presents the results of an experimental study on 18 m PSSC with single and double cross-arms along the length and using normal and high strength steel. In total, 77 tests were carried out to investigate the structural behaviour of such systems and improvements made by using high strength steel and stay systems. The results in this paper provide detailed data on the behaviour of realistic PSSC which was not available before and highlight the advantages of the using high strength steel in such systems.

3

Experimental behaviour of end plate i-beam to concrete-filled rectangular hollow section column joints

Neves L. C., Da Silva L. S., Vellasco P. C. G.

International Journal of Applied Mechanics and Engineering

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2004

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Vol. 9, no 1

63-80

EN

The behaviour of joints in steel rectangular hollow sections filled with concrete is frequently governed by the deformability of the column face loaded in bending. A good estimate of the joint moment-rotation response relies on the knowledge of the behaviour of this component, yet to be fully characterized. With the objective of providing design procedures for this type of joints within the framework of the component method, already adopted by Eurocode 3 to assess the moment-rotation behaviour of joints, an experimental study on test specimens loaded under monotonic loading is presented. Test setup, tested geometries, instrumentation and a description of the behaviour are described in detail, focusing on the column face stress distribution and deformation pattern. The moment-rotation curves and the resulting models to establish the force-displacement curves are presented. Finally, the paper closes with a discussion of the influence of the main geometrical parameters on the joint behaviour.