SC-HYBWalls · Self-Centring Earthquake-Resilient Hybrid Steel-Concrete Shear Walls with Rocking Beams
Horizon 2020 — Marie Skłodowska-Curie Actions
- Duration
- 2022-02-01 → 2024-03-26
- EU contribution
- €212,934
- Participants
- 1
- Scheme
- MSCA-IF
Lines connect the coordinator with its partners.
Results in brief
Self-Centring Earthquake-Resilient Hybrid Steel-Concrete Shear Walls with Rocking Beams
Conventional seismic-resistant structures are designed to experience significant inelastic deformations under moderate to strong earthquakes. Inelastic deformations due to damage to structural members, and residual story drifts and deformations that cannot be retrieved after earthquakes. 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. In addition, residual deformations make often buildings more expensive to repair than to rebuild. Hence, the main objective defined for the SC-HYBWalls project was the development of minimal-damage/high-resilient structural systems that couple the advantages of self-centring and hybrid steel-concrete structural systems responding to the safety and socio-economical needs of modern societies. The project aims to: • address the disadvantages of conventional self-centering solutions; • experience minimal damage that can be rapidly and easily repaired (i.e., achieve high resilience) during moderate ground motions controlling both structural and non-structural components; • minimize the probability of collapse (i.e., protection of human life) under very strong and rare earthquakes; • allow the immediate occupation of the building after ground motions (i.e., avoid downtime); • facilitate and expedite the construction. The project's objectives were achieved through the development, design, and testing of a novel self-centering device equipped with friction dampers. The friction-damped self-centring (FDSC) device was integrated into steel coupling beams that connect reinforced concrete walls to each other or to steel columns at their sides, forming an innovative seismic-resilient structural system named SC-HYBWalls. The comprehensive investigations conducted in this project demonstrated the enhanced seismic performance and resilience of buildings taking advantage of SC-HYBWalls. Simulation of the response of buildings featuring SC-HYBWalls to a number of earthquakes highlighted the proposed system's efficiency in providing effective self-centring capabilities and significantly reducing earthquake-induced residual deformations.
Data: CORDIS, © European Union
Project objective
Control of both structural and non-structural damage is of utmost importance in Performance-Based Earthquake Engineering. Alleviation of the structural damage and reducing collapse risk under sever ground motions has been a general research focus in earthquake engineering. However, earthquake reconnaissance reports also foreground the significance of injuries, fatalities and economical losses due to failure of non-structural components. Furthermore, the functionality of some critical buildings carrying acceleration-sensitive equipment such as hospitals can be interrupted due to non-structural damage after a seismic event. Therefore, it is vital to urgently meet an inevitable social demand for truly resilient construction. In target resilient buildings, both structural and non-structural damage should be minimized simultaneously in order to mitigate direct and indirect losses such as repair costs and costly downtime during which the building cannot be used or occupied. Different strategies have been implemented by researchers to mitigate the structural and non-structural damage. As an instance, self-centering frames have been developed with the aim of avoiding residual drifts after a seismic event. Meanwhile, hybrid steel-concrete frames consisting of coupled walls with controlled energy dissipation mechanism have recently grabbed a lot of attentions since they take the advantage of both stiffness of RC walls and the ductility and energy dissipation capacity of steel components. The aim of this project is to develop and investigate a novel resilient structural system in which a self-centering mechanism is coupled with hybrid steel-concrete structural systems. Hence, the new system will be capable of resisting moderate to high intensity ground motions while both structural and non-structural damages are kept minimum simultaneously. Employment of this novel earthquake resilient structural system also leads to sustainable, fast and simple construction.
Original text from CORDIS.
Participants
- UNIVERSITY COLLEGE LONDON · LondonCoordinatorUnited Kingdom
Links
Data: CORDIS, © European Union