H2020Индивидуална стипендия2020–2023

ASPIRE · Assessing Seismic Performance of Integral bridges for improved Resilience and lifecycle in Earthquake-prone areas

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

Период: 2020-10-01 → 2023-05-13
Финансиране от ЕС: 224 934 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Интегралните мостове, които нямат разширителни фуги и опори, се анализират чрез симулации и тестове за устойчивост при земетресения. Това помага за създаването на по-безопасни конструкции с по-ниски разходи за поддръжка и по-малки въглеродни емисии.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

Assessing Seismic Performance of Integral bridges for improved Resilience and lifecycle in Earthquake-prone areas

Integral abutment bridges (or integral bridges) have no expansion joints and bearings. For this reason the maintenance and construction costs are reduced, and they result in having less carbon emissions and less costs during the life-cycle. Integral bridges represent a valid alternative to conventional bridges, especially for short spans. Because of their particular design, the forces exerted on one abutment by the backfill soil and those acting on the deck are transmitted to the opposite abutment and embankment, thus generating a complex interaction between the bridge structure and the soil. Soil-Structure Interaction (SSI) is a key aspect to understand their response under earthquake. Due to their increased structural redundancy, integral bridges can provide higher structural safety against seismic actions. Despite the increasingly high number of studies regarding their response under earthquake, there is still uncertainty about the dynamic response of IABs including SSI and a lack of standard procedures to evaluate their seismic performance. The new version of the Eurocode 8 Part 2 on bridges (in the approval process) contains important novelties and a new section specifically dedicated to the design of integral bridges. Project ASPIRE had the main goal to investigate the seismic response of integral abutment bridges, to shade light on the feasibility and performance of this bridge typology in earthquake-prone areas, and to study their life-cycle behaviour. In particular, Specific objectives were the definition of the site-specific seismic hazard; the definition of a numerical simulation strategy to investigate the seismic response of integral bridges including Soil-Structure Interaction; the development of experimental tests to investigate the life-cycle and seismic behaviour; the investigation of the impact of earth pressures on the abutments and find suitable mitigation strategies; the assessment of vulnerability and improved lifecycle performances of integral bridges. The main conclusion are that: 1) Integral Bridges can be suitable for extensive use in earthquake-prone areas, soil-structure interaction should be investigated accurately; 2) attention should be paid to the maximum span length, for longer spans the damage level in the abutment/backfill system can be higher; 3) The comparison with Eurocode 8 provisions can help with the preparation of guidelines for structural design.

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

Цел на проекта

The ASPIRE project aims at assessing the feasibility to construct Integral Abutment Bridges in earthquake-prone areas. In the last years in Europe there was an increasing interest on this particular class of structures, characterized by the absence of bearing supports and expansion joints, elements commonly used in bridges which are subjected to deterioration due to ageing and thermal effects, thus requiring expensive periodic maintenance. Integral Abutment Bridges have very low costs of maintenance and improved durability while their increased redundancy can result to superior behavior during an earthquake. Still, there are high uncertainties and a lack of standard procedures to systematically evaluate their seismic performance. As a consequence, no indication is given in Structural Eurocodes as well as in other major seismic codes worldwide. The project proposes an innovative multi-disciplinary procedure including: (a) the evaluation of structure-specific seismic hazard; (b) experimental investigation on the shaking table of the University of Bristol Earthquake Lab (c) the calibration of numerical models including their complex Soil-Structure Interaction; (d) the development of novel fragility curves tailored to the salient features of integral bridges, and (e) the development of Risk and Resilience metrics for the estimation of the improved lifecycle associated with the better durability and lower damage of integral bridges due to earthquakes. The project will be implemented at the University of Bristol, integrating and extending the experimental and numerical capabilities of the Earthquake Laboratory on Integral Abutment Bridges, improving at the same time the skills and competences of the researcher. The results of the project will provide a robust scientific basis to justify the use of Integral Abutment Bridges in seismic areas, with a special attention to European countries and Road Networks.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITY OF BRISTOL · BRISTOLКоординаторОбединеното кралство