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Motion‐based design of vibrating civil engineering structures under uncertainty conditions
Author(s) -
JiménezAlonso Javier Fernando,
NaranjoPerez Javier,
Díaz Iván M.,
Sáez Andrés
Publication year - 2020
Publication title -
structural concrete
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.912
H-Index - 34
eISSN - 1751-7648
pISSN - 1464-4177
DOI - 10.1002/suco.201900537
Subject(s) - structural engineering , conceptual design , engineering , engineering design process , reliability (semiconductor) , vibration , tuned mass damper , design process , deck , optimal design , process (computing) , computer science , damper , mechanical engineering , work in process , power (physics) , physics , operations management , quantum mechanics , machine learning , operating system
Improvements in the strength of construction materials, together with the esthetic requirements demanded by current societies, have led to a continuous increase in the slenderness of modern civil engineering structures. This fact results into lightweight designs that, unfortunately, must cope with two key problems: (a) slender structures are not only prone to vibrate under external actions; but (b) their dynamic behavior becomes also more sensitive to the intrinsic variability of the operational and environmental service conditions. These two circumstances must be faced from the early conceptual design phase of the structure. With the aim to assist in this process, a motion‐based design method, under a stochastic approach, is proposed, implemented and validated in this paper. In our proposal, the conceptual design problem is transformed into the combination of two coupled subproblems, involving an optimization subproblem plus a reliability analysis subproblem. The performance of the proposed method is illustrated via its application to a numerical case study involving the optimal design of two tuned mass dampers, installed to control the pedestrian‐induced vibrations in a cable‐stayed footbridge with prestressed concrete deck.