Wu, Jing-Ren;
Di Sarno, Luigi;
Freddi, Fabio;
D'Aniello, Mario;
(2022)
Modelling of masonry infills in existing steel moment-resisting frames: Nonlinear force-displacement relationship.
Engineering Structures
, 267
, Article 114699. 10.1016/j.engstruct.2022.114699.
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Wu et al 2022_Modelling of Masonry Infills in Existing Steel MRFs Nonlinear Force-Displacement Behaviour - Autors Version.pdf - Accepted Version Download (3MB) | Preview |
Abstract
The study described and summarised in this paper was aimed at developing a framework for the definition of force-displacement relationships for single-strut models for masonry infill walls within steel moment-resisting frames. The methodology is based on a genetic algorithm optimisation and can be used for the calibration of force–displacement curves based on databases from either experiments or numerical simulation. A case study is also tested to demonstrate the framework in detail. Due to limited available experimental data on the seismic response of existing steel frames with masonry infills, a set of comprehensive finite element micro-models developed in Abaqus are used to generate a database. The optimal values of the parameters to feed a force–displacement relationship of the single-strut model of the masonry infills are obtained for each micro-model by solving optimisation problems with a genetic algorithm. The optimisation problem involves the minimisation of the discrepancies between the global responses from the database and their corresponding single-strut models through least square minimisation. With the optimal values as the input variables, a generalised quadrilinear model of the masonry strut is obtained through regression analysis and is validated against additional micro-models of infilled steel frames.
| Type: | Article |
|---|---|
| Title: | Modelling of masonry infills in existing steel moment-resisting frames: Nonlinear force-displacement relationship |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.engstruct.2022.114699 |
| Publisher version: | https://doi.org/10.1016/j.engstruct.2022.114699 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Moment Resisting Frames, Steel Structures, Masonry Infills, Equivalent strut models, Genetic Algorithm |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10152919 |
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