H2020Индивидуална стипендия2015–2017

EQRESFRAME · Earthquake-resilient self-centering steel frame

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2015-08-31 → 2017-08-30
Финансиране от ЕС: 183 455 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Стоманени рамки със самоцентриращи се механизми и специални абсорбатори на енергия се тестват за по-добра устойчивост при земетресения. Това помага за създаване на сгради с минимални повреди, които могат да бъдат бързо възстановени след силно трусене.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Earthquake-resilient self-centering steel frame

An important challenge of future building and construction design is to combine the objectives of further structural design optimization with aspects related to structural seismic safety and resilience leading to smart minimal-damage seismic-resistant and sustainable structures. Resilience can be achieved with structures that can be easily repaired, if damaged, so that building service can be restored within an acceptable short, if not immediate, time after extreme loading conditions. There is an urgent societal need for minimal-damage structures that can truly achieve seismic resilience. For example, researchers have developed self-centering moment resisting frames (SC-MRFs) with the goal of avoiding residual drifts, while others have focused on increasing the energy dissipation capacity of structures by adding dampers, such as Buckling Restrained Braces (BRBs) with the goal of reducing story drifts and story accelerations. This project aims to investigate the seismic behaviour of minimal-damage SC_MRFs equipped with BRBs with the goal of achieving a structural system, which has the inherent mechanical properties (i.e. high stiffness, modest strength, re-centering force) to simultaneously control peak story drifts, residual story drifts, and peak floor velocities and accelerations. The project pays particular attention in the critical regions of this structural system, i.e. the beam-column-gusset plate connections and the column bases, for which both experimental and numerical assessment have been conducted. Insights into the performance and residual capacity of dual systems made of BRB frames coupled with self-centering moment-resisting frames are provided through a simplified single-degree-of-freedom model. A non-dimensional formulation of the equation of motion is introduced, the statistic of the normalized peak, residual displacements and cumulated ductility of the system is evaluated for a set of ground motion records. Different values of the BRB target maximum ductility and coupled frame properties are considered.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

An important requirement of performance-based earthquake engineering is the simultaneous control of structural and non-structural damage. Structural damage measures are related to story drifts, inelastic deformations and residual drifts. Non-structural damage measures are related to story drifts and storey accelerations. Earthquake reconnaissance reports highlight that injuries, fatalities and economical losses related to failure of non-structural components far exceed those related to structural failures. Moreover, explicit consideration of non-structural damage becomes vital in the design of critical facilities such as hospitals carrying acceleration-sensitive medical equipment, which have to remain functional in the aftermath of an earthquake. Structural and non-structural damage results in direct and indirect losses such as repair costs and costly downtime during which the building is repaired and cannot be used or occupied. Therefore, there is an urgent need for minimal-damage structures that can truly achieve seismic resilience. Researchers have developed self-centering frames with the goal of avoiding residual drifts. Other studies focused on increasing the energy dissipation capacity of structures by adding dampers with the goal of reducing storey drifts and storey accelerations. This project aims to couple, for the first time, self-centring systems and modern seismic energy dissipation systems with the goal of developing a novel earthquake-resilient steel frame. The optimal combined design of the self-centering and energy dissipation mechanisms will lead to a steel frame with superior minimal-damage seismic performance.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITY OF WARWICK · COVENTRYКоординаторОбединеното кралство