Abstract
The lack of in-depth understanding of the seismic behavior and ductility of precast concrete structures makes it difficult to reach to ductility demand which could be exhibited during an earthquake. The limitations are mainly related to the beam-to-column connections as the main load transfer paths. Two distinct exterior beam-column connections made of normal-strength concrete are investigated experimentally. Both dry and wet type installment techniques are used in the industrial type joints while the residential type joints are wet connections. The specimens are subjected cyclic displacement reversals in order to obtain information on strength, stiffness and ductility characteristics of the connection details. The preliminary design of the joints has been updated during the tests based on the damages observed, thus a set of improved specimens have also been built and tested, and a relatively better performance is obtained expectedly. The industrial and residential types of connections showed stable load-displacement cycles with high energy dissipation up to structural drift of 2%, though a significant level of pinching and deterioration of the critical section have occurred at around 3% drift level. The tested specimens have been numerically modeled to calibrate the analytical tools, and a satisfactory approximation has been obtained between experimental and numerical results.
Original language | English |
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Pages (from-to) | 157-172 |
Number of pages | 16 |
Journal | Engineering Structures |
Volume | 99 |
DOIs | |
Publication status | Published - 5 Sept 2015 |
Bibliographical note
Publisher Copyright:© 2015 Elsevier Ltd.
Funding
The research presented herein was conducted in the framework of the FP7 project “SAFECAST: Performance of innovative mechanical connections in precast building structures under seismic conditions”, Research for SME Associations, Grant Agreement number 218417, which was coordinated by Dr. Antonella Colombo from ASSOBETON, Italy. The financial support provided by the Commission of the European Communities through this project is greatly appreciated. The study was conducted at the Structural and Earthquake Engineering Laboratory of Istanbul Technical University. The supports of the Laboratory staff and graduate students and the contributions of M.Sc. Günkut Barka, M.Sc. Hakan Ataköy, Dr. Murat Şener and M.Sc. Ümit Özkan are gratefully acknowledged.
Funders | Funder number |
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European Commission |
Keywords
- Beam-column connection
- Cyclic behavior of connection
- Exterior connection
- Joint
- Precast construction