Seismic Evaluation and Innovative Strengthening Solutions for Existing RC Frame Structures with Infills Project

by Ramazan Özgür İridere | Dec 12, 2024

Project Title:  Seismic Evaluation and Innovative Strengthening Solutions for Existing RC Frame Structures with Infills

Funding Agency: 2566 TUBITAK - Bilateral Cooperation with National Natural Science Foundation of China (NSFC) - 123N803

Project Coordinator: Prof. Dr. Alper İlki (İTÜ) – Prof. Dr. Xiang-Lin Gu (Tongji Üniv.)

Investigators: Assoc. Prof. Dr. Umut Hasgül (Balikesir Üniv.)
Assoc. Prof. Dr. Altuğ Yavaş (Balikesir Üniv.)
Assist. Prof. Dr. Tamer Birol (Balıkesir Üniv.)
Assist. Prof. Dr. Erkan Töre (Balıkesir Üniv.)

Reinforced concrete (RC) frame structures with infills are commonly adopted in China and Turkey. These structures are witnessed serious damage in earthquakes due to irregularities in strength and stiffness which is due to the flexible layout of infilled walls. The frame-infill interaction effects, as well as interaction behavior between orthogonal infilled frames, make the precise analysis of highly-nonlinear seismic responses of such structures more complex and difficult. The structure exhibits various disaster mechanisms such as damage evolution, local failure, and overall collapse under earthquake actions. At the same time, the existing structures, which are intact, seismic damaged, or strengthened, resulted in significant uncertainties in prediction of the collapse mode and failure process. Adjusting the structural irregularity on the system level and strengthening the columns and infilled walls on the component level, are expected to effectively optimize the structural failure process and to improve the structural seismic behavior. This project is coordinately applied Tongji University (China), Istanbul Technical University (Turkey), and Balikesir University, which are all strong in the field of seismic evaluation and strengthening. The exploratory research proposed will be conducted by using combined case study, experimental, numerical and theoretical investigations. Five working packages are intended to solve three key scientificproblems, i.e., frame-infill interaction effects, damage evolution and collapse mechanism of RC frame structures with infills, and seismic strengthening mechanism of RC frame structures with infills. This proposal aims to develop seismic evaluation methods of RC frame structures with infills, covering different scenarios, and to propose seismic strengthening strategy by using advanced material technologies.

 

İTÜ Faculty of Civil Engineering

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It can be accepted that the history of ITU Civil Engineering Faculty was commenced in 1727 by the establishment of Humbarahane during the era of Damat İbrahim Paşa. However, this attempt was to no avail due to the martyrization of the studwents of this school by the Janissaries.


In 1734, during the grand viziership of Topal Osman Paşa, classes related to Civil Engineering was being taught in Hendesehane, which was founded in Üsküdar. Similarly, this school was also closed after three years due to the opposition of the Janissaries. The reasons of the tragedy that occured in Battle of Chesma, 1770 were inadequacy of the ships and the ignorance of the Ottoman Navy.


Although the Atlantic Map (1513) and the Map of Europe and the Mediterranean Sea (1523) by Piri Reis were the leading pieces of the era, Ottoman viziers were so ignorant that they claimed it was impossible for the Russian Baltic Fleet to reach the Mediterranean Sea assuming that there were no sea connection. With the proposal from Gazi Hasan Paşa and Baron de Tott, Mühendishane-i Bahri-i Humayun was established during the time of Sultan Mustafa III, aiming to train naval construction engineers. Since Ottoman Empire did not have any engineering schools at the time, military engineering classes were taught by French engineers beginning from 1784. French lecturers had to return to their country in 1788 with the increasing suppression from Austria and Russia, which were unwilling for the development and thriving of Ottoman Empire. In 1759, during the Grand Viziership of Koca Ragıp Paşa, Humbarahane was reopened in Karaağaç, Haliç (Golden Horn) and continued to teach even though it was incompetent. In 1792, Lağımcı Ocağı and Humbaracı Ocağı (Guild of Sappers) were established.