In this paper a model is developed for steel links. The theoretical development of the model is based onthe approach proposed by Ramadan and Ghobarah although some modifications are introduced. Themodel consists of five elements connected in series. The central element has the same length andmoment of inertia as the link and simulates the elastic flexural behaviour of links (the shear stiffnessof this element is fixed at infinity). The two elements on each end are zero-length. They connect the beamsegments outside the link to the flexural element of the link and reproduce the behaviour of the links inshear (in both the elastic and inelastic ranges) and the inelastic behaviour of the links in flexure. Theforce–displacement relationship of the shear spring and the bending moment–rotation relationship ofthe flexural spring are schematized by means of the uniaxial material model recently proposed by Zonaand Dall’Asta for steel buckling restrained braces. The parameters that characterise the response of theshear and flexural springs are adjusted on the basis of laboratory tests on short and long links. The effectivenessof the model with the average values of the calibrated parameters is proved for short, intermediateand long links and compared with that of other models often used in non-linear dynamic analysis ofeccentrically braced frames.

Modelling of steel link beams of short, intermediate or long length

BOSCO, MELINA;MARINO, EDOARDO MICHELE;ROSSI, PIER PAOLO
2015-01-01

Abstract

In this paper a model is developed for steel links. The theoretical development of the model is based onthe approach proposed by Ramadan and Ghobarah although some modifications are introduced. Themodel consists of five elements connected in series. The central element has the same length andmoment of inertia as the link and simulates the elastic flexural behaviour of links (the shear stiffnessof this element is fixed at infinity). The two elements on each end are zero-length. They connect the beamsegments outside the link to the flexural element of the link and reproduce the behaviour of the links inshear (in both the elastic and inelastic ranges) and the inelastic behaviour of the links in flexure. Theforce–displacement relationship of the shear spring and the bending moment–rotation relationship ofthe flexural spring are schematized by means of the uniaxial material model recently proposed by Zonaand Dall’Asta for steel buckling restrained braces. The parameters that characterise the response of theshear and flexural springs are adjusted on the basis of laboratory tests on short and long links. The effectivenessof the model with the average values of the calibrated parameters is proved for short, intermediateand long links and compared with that of other models often used in non-linear dynamic analysis ofeccentrically braced frames.
2015
Link ; Steel; Modelling
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/33448
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