The ongoing revision of Eurocode 6 is an occasion to reconsider the criteria for verifying the second-order effects in URM walls subjected to combined vertical and out-of-plane loading. The current method proposed in Eurocode 6 is based on an axial load capacity reduction factor (ϕm), the values of which are estimated with an approximate model, conservative for a significant wall stiffness range. Moreover, the fact that the safety verification of walls subjected to significant lateral loading (e.g. seismic action) should be carried out in terms of lateral flexural capacity, also accounting for second-order effects, is still not fully recognised. For this verification, a moment capacity reduction factor (ϕM) can be defined, similarly to ϕm. Therefore, this paper provides: a refined numerical evaluation of the ϕ factors; the demonstration of their one-to-one correspondence; new models for their prediction and the recalibration of a recently proposed model; comparisons with results from literature.

Second-order effects in URM walls subjected to combined vertical and lateral loading

Marco Dona
;
Massimiliano Minotto;Francesca da Porto;
2020

Abstract

The ongoing revision of Eurocode 6 is an occasion to reconsider the criteria for verifying the second-order effects in URM walls subjected to combined vertical and out-of-plane loading. The current method proposed in Eurocode 6 is based on an axial load capacity reduction factor (ϕm), the values of which are estimated with an approximate model, conservative for a significant wall stiffness range. Moreover, the fact that the safety verification of walls subjected to significant lateral loading (e.g. seismic action) should be carried out in terms of lateral flexural capacity, also accounting for second-order effects, is still not fully recognised. For this verification, a moment capacity reduction factor (ϕM) can be defined, similarly to ϕm. Therefore, this paper provides: a refined numerical evaluation of the ϕ factors; the demonstration of their one-to-one correspondence; new models for their prediction and the recalibration of a recently proposed model; comparisons with results from literature.
2020
Brick and Block Masonry - From Historical to Sustainable Masonry: Proceedings of the 17th International Brick/Block Masonry Conference (17thIB2MaC 2020), July 5-8, 2020, Kraków, Poland 1st Edition
17th International Brick and Block Masonry Conference (17th IB2MaC 2020)
978-0-367-56586-2
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3466282
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