Life-cycle driven structures

Earthquake-resistant structures using repairable connections with increased lifetime and sustainability

Dr. Kanyilmaz coordinated the research project DISSIPABLE “Fully Dissipative and Easily Repairable Devices for Resilient Buildings with Composite Steel-Concrete Structures”, funded by EU-RFCS with contract n. RFCS-PDP 800699, 2018-2021.  DISSIPABLE team performed large scale demonstration of the steel-concrete composite structures with anti-seismic reparable systems. In the project, systematic post-earthquake repair and reassembly procedures have been developed which have been provided as “instructions for use” in the end. The life cycle economic and environmental benefits of the tested systems have been also quantified.

Video showing the construction of a shaking table specimen (using dissipative and repairalbe components) within EU-RFCS DISSIPABLE project

More details can be read in the following articles:

Racking systems (pallet racks and automated warehouses) in earthquake regions

Dr. Kanyilmaz has worked in advancing Automated Rack Supported Warehouses (ARSW), the cutting-edge in storage technology, offering significant reductions in cost, space, and energy compared to conventional warehouses. The goal is to introduce innovative strategies to enhance the safety, reliability, and cost-efficiency of ARSW. More details can be read in the following articles:

Seismic design of concentrically braced frames under low-to-moderate seismicity

Within MEAKADO research project, he proposed an adjusted design approach for the low-to-moderate seismicity design of Concentrically Braced Frame (CBF) structures. With the new approach, the aim was to satisfy both economy and safety criteria, based on the exploitation of the three features of CBFs, which had not been deeply examined before: “frame action provided by gusset plates”, “contribution of compression diagonal and its post-buckling strength and stiffness”, and “energy dissipation capacity of non-ductile bracing joint connections”.

3
Full scale tests performed within MEAKADO project

His team investigated these aspects by means of incremental dynamic analysis of case studies, based on the numerical models calibrated on full-scale experimental tests published elsewhere by us.

Fig. 1
Some highlights from the experimental results

Based on the results of full-scale experiments, his team quantified the ductility provided by the bolt hole ovalization and the slippage of preloaded bolts of standard bracing joints of concentrically braced frames that are not fulfilling the current over-strength design criteria.

Fig. 13
Stresses around bolts indicated by thermal immage classification

More details can be read in these articles:

Related news

EU-RFCS DISSIPABLE final workshop

23 February 2022

EU-RFCS DISSIPABLE final workshop: Alper coordinated this 4 year research project composed of pilot-scale shaking table tests, hybrid numerical/ physical simulations, life cycle economic and environmental analysis of #earthquake-resistant & dissipative #steel structures: In this workshop, the results will be presented to the worlwide engineering community, putting “#sustainability” on the table of seismic design.

Automated warehouses, and massive racking structures

26 October 2021

The MSc thesis of Aleksei Kondratenko resulted in an elegant journal article (4 rounds of review in Bulletin of Earthquake Engineering). It is about Automated warehouses, which keep the goods arriving us from Amazon and more. Massive racking structures, reaching 40 m height + 100 m in plan, using often cold formed steel.